1967 Lamborghini Miura P400 (RG)
Restoration Log by Dan Mooney



We are delighted to have been entrusted with the care and servicing of this beautiful Lamborghini Miura P400.

Current project - full engine rebuild, rear frame repairs and concours restoration of engine bay.


Update report - May 21, 2021

Update report - May 13, 2021

Update report - May 11, 2021

Update report - May 6, 2021
The outer sills and wheels have now been repaired and refinished.

Update report - April 30, 2021

Update report - April 26, 2021

Update report - April 12, 2021

Update report - April 8, 2021
Repairing both outer sill panels and fabricating rear firewall cover panels.

Both outer sill panels have some corrosion damage
which needs attention
Doesn't look too bad at first glance...

But several holes were lurking beneath the filler

The worst damage has now been cut out and a
repair panel welded in place
In primer, almost ready for repainting

Fabricating the new rear bulkhead cover panels

New panels being trial fitted with clekos

Update report - March 29, 2020

Update report - January 25, 2021
Align honing in progress.

Update report - January 15, 2021

Update report - January 13, 2021
It is now time to start going back together with the Miura.

Update report - November 11, 2020
We have now wrapped up the sheet metal repairs to the engine cradle, rear main frame and the bonnet hinge frame. The body will be removed from the chassis table later today.

Repaired bonnet hinge frame tack welded in place

After confirming bonnet fit, the hinge frame is now
TIG welded in place
New bonnet frame braces welded in place

Trial fitting the bonnet

Time to remove the body from the chassis table

Update report - November 6, 2020
A beautiful new high performance radiator, complete with replica FIM tags, and continuing repairs to the engine cradle and rear bonnet hinge frame.

Stunning quality replacement radiator

Starting to tack weld the new lower frame rails to the
rear bulkhead and floor

Seams and joints are now all TIG welded

Rear bonnet hinge frame had corrosion issues and
had been poorly repaired in the past

TIG welding repair panels and new tubing at the
hinge points

The first brace panel now welded in place

Ready for primer and paint!

Update report - November 3, 2020
Rear frame and engine cradle construction progressing well!

Update report - October 28, 2020
Andy has been making excellent progress with the frame repairs and fabrication.

Quite a lot of corrosion behind the corner sections

Original corner sections will be remade

Fabricating the upper cross bar

Starting to come together!

Update report - October 23, 2020
Lots of progress fabricating and welding the lower/rear chassis rails and engine cradle.

Trial fitting the engine mounts on the new lower
frame rails

Trial fitting the bare block to finalize engine mount

Main lower structure now mostly welded together

Fabricating the close out panels for the bottom
side of the lower chassis rails
Machining strengthening gusset beading on the new
lower panels

Beading replicates factory panel
TIG welding the lower closing panels together
while attached to frame rails with clekos

Almost ready to weld up to the rear bulkhead

Update report - October 14, 2020

Andy has begun trial fitting the newly fabricated rear frame rails having welded the new vertical frame struts in place on the bulkhead.

Update report - October 8, 2020

Update report - October 8, 2020

Andy has been making great progress with the rear bulkhead repairs/reconstruction.

Lower portion of the rear bulkhead is rusty and
will be replaced

The box section where chassis side rails mount
will also be reconstructed

Corroded metal cut away
Trial fitting replacement panel

Fabricating the vertical side frame struts

Trial fitting the vertical side frame struts

Welding the vertical frame struts together

Ready to install

Update report - October 1, 2020

Both cylinder heads now fully assembled.

Corey has now completed the machine work to both cylinder heads.

Update report - September 24, 2020
The follow sequence of photographs show Andy fabricating your new rear chassis rails.

Holes have now been dimpled, as original
Area around the engine mount is reinforced

Spot welding the support braces in place

Comparing the old and new chassis rail sections

Update report - September 22, 2020

Cylinder head rebuilds underway in the engine shop as the front frames are being prepared for refinishing in the Coachworks.

Overall the heads are in very good condition

Several of the original valve stems were scored

Pressure testing heads - both OK

Heads now cleaned and media blasted

Exclusive Team CJ valve guides

Original bronze seats will be replaced with
hardened steel

Machining out the old bronze seats

Sizing seat pocket counter bores for new seats

No major repairs required at the front end of the car

Update report - September 11, 2020

Lots of progress at both ends of the Miura on the chassis table.

Update report - August 6, 2020
We have now disassembled the front end as we prepare to refinish all the black areas. At some point in the past the front end was painted gloss black, although the Miura frames and bulkheads were painted more of a satin black when they were new. Interestingly, when we removed the data plate from the right bulkhead area, the original satin black finish was clearly visible beneath the plate. Gently rubbing the satin black paint with lacquer thinner revealed what is presumably some of the original orange paint that would have been applied by Bertone.

We understand
that the frames came from Marchesi finished in satin black. The frames were then united with the body by Bertone, who also painted the cars for the Lamborghini factory. Once the cars were assembled, the factory sometimes touched up certain areas with more satin black. The last three photos in the sequence below show the area beneath the data plate.

Front end has now been stripped

A little lacquer thinner aided detective work!

Update report - July 27, 2020

The Miura body has now been secured to the chassis table in preparation for repairs to the rear engine cradle and chassis rails.

Update report - July 17, 2020

Darien has now completed the tear down of this Miura engine.

Update report - July 15, 2020
Engine tear down underway..

Update report - June 8, 2020
Removing the engine for rebuild and inspecting the rear frame and bulkhead, both of which will be repaired and refinished before the engine is reinstalled.

Rear subframes appear to be generally sound


Update report - May 2020
Our next task will be to rebuild the engine and restore the engine bay to concours appearance.

Update report - August 25, 2019

Last week we started going back together with the restored and rebuilt suspension. We also refinished the air cleaner boxes and painted the newly fabricated front suspension cross-member.

Starting to reassemble the front suspension

Nuts are temporary and will be replaced with yellow
Nyloks once suspension geometry has been set up

Rear shocks and springs have been restored and
repainted to original specs

New cross-member has been painted along with the
new sway bar links

Gratuitous photo bomb by the Bull Award from last
weekend's Concorso Italiano

Jake has fabricated a new front suspension cross-member to replace the damaged original.

Repainting the Koni shocks, springs and rear half shafts.

Springs were media blasted back to bare metal,
Konis sanded down
Half shafts and springs repainted in correct 'Miura'

Shocks are painted to match springs, except for
upper mounts which are left Koni orange

Josh has now removed and disassembled the Miura's distributors. Both units show significant wear and it is obviously a long time since they were serviced.

Jake has been busy fabricating a pair of rear license plate lights for the Miura. Thanks to Andrew Romanowski of Lamborghini Club America for the loan of a pair of original lamp housings for us to replicate.

Once painted, the new lamp housings are virtually
indistinguishable from the originals
New housing on left, original on right

Thanks to Andrew Romanowski of Lamborghini Club America who loaned us a pair of fuse box covers to copy, as our Miura was missing its 'leather' cover. Although often referred to as 'leather' fuse covers, they are actually made of heavy grained black vinyl. The P400 and P400S covers are very slightly different so we created templates for both, for future reference.

We also machined new Delrin escutcheons that sit behind the window cranks as we were missing the one for the driver's door.

Noting slight differences between 400 and
400S covers

New cover sewn and ready to rivet to the side panel
Installed on car

Plug wire conduits have been moved beneath
the rain shields

Corey machined new Delrin escutcheons for
the window cranks
New escutcheon sits beneath the window crank

We were honored to receive a visit from the maestro himself, Valentino Balboni, earlier this week. He was kind enough to spend some time going over the Miura and making some suggestions and recommendations to the Team CJ crew. Needless to say, he also test drove the car and gave it his official seal of approval!

Today the Miura was one of three cars in our care that we took to COTA to support the Drive and Give charity event.
I am happy to report that the car drove and performed flawlessly, even in Austin's infamous traffic!

Valentino Balboni inspecting the Miura
Time for a test drive!

Headed out to COTA just after dawn today
Keeping good company in the pit lane at COTA

Attending to a few more items on the Miura ahead of our visit from Lamborghini legend Valentino Balboni next week.

New Miura badge installed, minus the screws which
held the old one in place
Fuel pump cap painted 'Flash Red' per original, new
braided fuel line installed

Tires changed from Michelin XWX to original spec
Pirelli Cinturato CN12 215/70 R15
Chassis stamping painted 'Flame Red'

We have been spending some quality time with the Miura correcting a few originality issues and fabricating some previously missing components.

Corey machining new bronze bushings for the
cable stays for the bonnet and engine cover

The first of the bushings attached to the new cable

Incorrect headlamp lenses

Correct lenses now installed Previously missing BP plate

Braided fuel line for fuel pump
Installing correct style Kangol seat belts

Incorrect 'square' indicator switch previously
Correct 'round' Lucas indicator switch now installed

Fabricating a heat shield for the oil sending unit

Powder coated semi-gloss black (second shield
is for another Miura owing friend)
Fabricating the previously missing passenger footrest

An original footrest kindly loaned by Andrew
Romanowski of Lamborghini Club America
New foot rest now installed

The paintwork repairs to the lower valance have now been completed.

Performing some minor body repairs beneath the nose of the car. Prior to replacing the old shock absorbers, the front end had been bottoming out and causing damage to the lower valance. Our repairs are now virtually complete and we expect to be painting the valance early next week.

Prior to replacing the front Koni shocks the car had
been bottoming out, damaging the lower valance
This was the worst of the damaged areas

Panel is cracked around the hinge

A small hole was lurking beneath this previously
repaired area
Metal to Metal aluminum based filler

Repaired panels now ready for priming

Damaged areas now primed
Repaired areas will be painted early next week

Using the Spies Hecker color match camera
Glad to see I am not the only person working
at the weekend (Valentino Balboni video)

Today's update outlines the correction of a couple of issues related to the Miura plug wires. The first problem was that the conduit brackets were held to the cam covers by extremely flimsy little wire clips, all of which had been repaired (soldered) several times in the past. The next issue was that the conduit clips were installed 180 degrees out, meaning the plug wires ran down the center line of the engine, rather than sitting beneath the shields.

Chris fabricated new conduit clips from stainless steel stock. They look almost identical to the originals, but a far sturdier. He then installed the new clips so that the plug wires are now protected and hidden by the shields.

Next task (already underway) is the repair and paintwork of the damaged bodywork beneath the nose of the car.

The plug wires had been sitting along the
center line of the engine
Original clips were extremely flimsy and were
constantly breaking

Chris decided to fabricate new clips

Installing the new clips

Plug wires and clips now hidden beneath shields
Job done!

The headlamps on the Miura had recently stopped working and they were also suffering from decades of grime and condensation stains behind the lenses. Chris has now removed and disassembled both headlamp assemblies, cleaned all the internals and corrected the electrical issues.

Both headlamps were a little grimy behind
the glass lenses
Disassembling the lamps for a thorough cleaning

Inner edge of glass lenses were stained following
many years of condensation

Reassembling headlamps after cleaning
Looking a lot better!

Electrical issues resolved, headlamps fully
functional once more

I am pleased to report that we have completed our upgrade of the clutch hydraulic system and the clutch is working perfectly, with a noticeable improvement in pedal feel. Thanks to Valentino Balboni for the recommendation and advice!

Rocker panel removed, exposing the fire
extinguisher line
Comparing old (L) and new fitting bore ID

Old fitting
New fitting approximately .035" larger

Time to address the clutch master cylinder

Before modification
Almost .050" greater ID after modification

Fabricating and installing the new hydraulic
hard line
Our new hydraulic line is the straight line
in this picture!

Showing where the new hard line meets up with the
new flex line (using original mounting holes)
Showing the new flex line terminating at the slave

We took the opportunity to tidy up the routing of
the fire extinguisher and brake lines
Rocker cover replaced, clutch upgrade now

We have already rebuilt the rear brake calipers and installed the new Quick Silver headers and exhaust. Having investigated the clutch hydraulics, we believe the biggest restriction is in the aftermarket braided clutch line, not the ports of the master and slave cylinders. That being the case, we are going to replace the small bore braided line with larger steel line to see if that provides a lighter clutch pedal feel.

Caliper pistons are rusty and will be upgraded to
new stainless pistons

New seals and pistons installed

Rebuilt calipers now reinstalled
Investigating the bore size of the clutch slave

Hydraulic line makes a 90 degree turn immediately
after leaving the clutch master cylinder

Braided clutch line has very restrictive bore
Time to remove and replace the old headers
and exhaust

Removing the left hand header

New Quick Silver system fits beautifully

Update report - October 14, 2017
Earlier today legendary Lamborghini factory test driver Valentino Balboni piloted this beautiful Miura for three "aggressive laps" around MSR in Houston. Mr. Balboni had driven the car previously and I am proud to report that he declared our recently completed mechanical work a complete success. He told the owner of the car, who was a passenger for the laps around MSR, "It is like a different car...better than expected."

Click on the photo below for a short video clip of the legend behind the wheel.

Update report - October 10, 2017
I am pleased to report that we have now completed the transmission rebuild and been busy tuning the rebuilt Webers on the Dyno. Earlier today I took the car out for some initial road testing, which went very well.

Click on the image above to watch a short video of the car going through the gears on the Dyno

Road test video # 1
Road test video # 2

Installing the engine and transmission after
the rebuild
Preparing to reinstall rear clip/engine cover

Time to run the car through its paces on the Dyno
Tuning the rebuilt Webers on the Dyno

We have now completely rebuilt the Weber carbs and will be wrapping up the transmission rebuild in the next couple of days. We are on schedule to reinstall the engine and transmission on Wednesday of next week.

Carb prior to disassembly

Air corrector jets were very sooty

Measuring float height

Cleaning carb bodies

Carbs now fully rebuilt

Comparing old (L) and new (R) synchros

Assembling the main shaft with
new synchros

This is the shifter box
New gaskets used as we go back together with
the transmission

Installing the diff spacer (bearing retainer)

Assembling the shifter box

Removing and disassembling the transmission for rebuild.

8mm wrench has apparently been wedged in
place for many years...
Removing the clutch cover

Differential is in good condition

2nd gear synchro is in very bad shape

Comparing new 2nd gear with original (on right)
Comparing old and new synchros

Plenty of evidence this is not the first time the
transmission has been apart

When the time comes to go back together with this project, we will upgrade the headers and exhaust with a superb quality replacement system from Quick Silver in England.

Headers are no longer serviceable
New 304 stainless steel Quick Silver system

I am pleased to report that we now have this project underway. Interesting to note that the engine is date stamped July 27, 1967, meaning we removed it on its 50th birthday!

Work underway
Rear clip will add a little Italian flair to my office
for a few weeks

Webers will be rebuilt

Engine and transmission removed
Interesting that the engine was removed on
its 50th birthday!

Cylinder heads are also date stamped

The following photographs cover the relocation of the driver's seat belt shoulder anchor, and the installation of new front brake rotors.

Installing a seat belt anchor point over the
driver's left shoulder
Cutting an access panel behind the seat belt
mounting point

Fabricating and installing a panel so back side
of seat belt anchor can be accessed
Belt now positioned over driver's shoulder, rather
than across his neck

Horns replace, now working

Installing new front brake rotors

Lock tabs folded over
Rear tabs had not been previously folded, which
has now been corrected

Today we have been fabricating and installing new brake lines and balancing the road wheels. Previous balance weights had been glued in position where they contacted the calipers when the wheels rotated. There is so little clearance between the top of the calipers and the inner surface of the wheel rim, that you really have to use clip on weights attached to the inner bead. Several of the old balance weights were missing altogether and others were barely attached.

Hard lines to rear calipers were strained and
actually cracked open when removed
New lines were fabricated and installed

New line fabricated and installed much tighter
around top of front right caliper
After cleaning FR inner rim, damage caused by old
brake line contacting inner rim clearly visible

Balance weights had been glued where there
was insufficient clearance for calipers
Cleaning inner rims prior to re-balancing wheels

Bead clip balance weights are a simple fix
to caliper clearance problems
All 4 door hinge pins are now secured with
cotter pins and E clips

Another productive day working our way through several issues. Unfortunately we discovered a few new issues, such as brake lines rubbing inside wheels, and defective air horns, etc, but we were still able to check off several items today.

Brake line rubbing against inner rim of
front right wheel
Witness marks show where brake line has been
contacting inner rim

Engine cover release handles were missing
grommets on both sides
Missing rubber grommets caused handles to rattle
and clunk around

A little shrink wrap and a custom elliptical rubber
washer was a cheap and cheerful fix
Lock nut was missing from the back of the driver's
side handle - now installed

Door hinge pins need securing
Upper passenger side pin literally about to fall out

#3 fuse was vacant and keyed, so we decided
to use it for the new fan relay
Fan relay now wired in

Fan relay positioned by battery
New circuit breaker

We are happy to get this new project underway. Our first task will be to address several electrical issues. We have already rebuilt the right hand headlamp mechanism, installing a new bronze crank gear, rewired the headlamp motor and rebuilt and rewired the fog lamp switch. You now have fully operational headlamps and fog lamps.

RH exhaust tip has been pushed up into the rear
valance, causing slight damage to the valance

Slightly damaged chassis tube extension
Brake rotors will be replaced

Damage under front right corner

Small dent at front left corner
Inoperative fog lamps are loose on their mounts

New bronze gear will be installed in RH
headlamp mechanism

Headlamp motor was wired incorrectly

Auxiliary (switch operated) fan was inoperative
Clock is inoperative. Good power and ground, so
almost certainly internals bad.

Both headlamps now operational

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