|1967 Lamborghini Miura P400 (Topo)
|Restoration log by Dan Mooney
Lamborghini Miura bonnets (and rear engine covers) are extremely susceptible to galvanic corrosion because of the way the aluminum outer skin is fitted over the top of a lightweight steel subframe. The following sequence of photographs show the removal of the bonnet outer skin revealing significant corrosion in the outer flanges of the aluminum panel.
|Preparing to de-skin the Miura bonnet
|Rivets are first drilled out
|Folding back the alloy out flanges reveals
|Galvanic corrosion is present wherever
|Lifting away the outer alloy skin
|Extremely lightweight steel bonnet skeleton
||The alloy bonnet skin weighs 32 lbs
|Interesting to note that the chassis black
applied AFTER the subframe and outer skin
were assembled together
|The front wheel arches must have been
prior to any black paint being applied
De-skinning the engine cover has revealed a fair amount of galvanic corrosion everywhere that the aluminum skin came into contact with the steel frame.
|Rarely seen steel structure that supports
aluminum outer skin
|The rear cover skin weighs a mere 21 lbs
|Removing the steel wire from the bottom
the allow panel
Removing the aluminum boot floor assembly and corresponding inner wheel arch panels. The boot floor was held in place with 132 rivets.
Yesterday we were delighted to receive a visit from Topo's owners. Rob and Jan visited the Team CJ Workshop to deliver a van load of spare parts and to check in on progress with the Miura. Among the many boxes of parts were Topo's original seats which had been restored and re-trimmed in Michigan in 1984. Interestingly, there was also a spare (third) Miura seat still in its original hide cover, so we were able to compare the untouched original seat with the restored seats. The Michigan trimmer did an outstanding job and replicated the original factory padding and stitching extremely well indeed. Thankfully, Rob and Jan also did a great job of protecting and storing the restored seats in the ensuing 35 years, so they remain in perfect condition to this day!
The first few photographs in the sequence below show Francis stripping the bonnet back to bare aluminum. The fourth image shows galvanic corrosion at the right/rear edge of the bonnet.
|Francis stripping the paint and primer from
|The green layer is an etching primer that
extremely well to the aluminum
|Typical galvanic corrosion where aluminum
|Bonnet is now stripped to bare aluminum
||Rob and Jan checking in on Topo
|An original factory Miura bucket street
||Interesting to observe the original factory
|Note how the factory finished the trimming
the seat base
|Topo's seats were restored in 1984
|Comparing Topo's restored seats with the
||I'd say the trimmer did a superb job back
The following sequence of photos show Francis stripping the paint, primer and filler from the rear clip. The rear wings and boot compartment are aluminum, whereas the transverse braces running across the body are steel.
|Francis using 'aircraft stripper' to remove
and primer by hand
|It looks very much like factory primer and
coat of paint
|The aluminum panels that form the rear clip
suffered only very minor damage
|Note magnet attached to the steel brace
|The panel behind the rear window is also
||Time to strip the bonnet!
|Rear bumper grille appears to be in its
||Interesting that it does not have the
noted in chassis # 3186 (also a 1967 P400)
|Comparing the original 'satin' finish to a
traditional 'chassis black'
|Fuel tank is not in great condition and
Off the road since 1980, this 1967 Lamborghini Miura P400, affectionately known as 'Topo', is about to undergo a total restoration in the Team CJ Works.
The first owner of this special car was legendary racer, collector, raconteur, author and car guy extraordinaire, Toly Arutunoff. Mr. Arutunoff bought the car new in 1967 and immediately took it racing - because that's the type of thing he did!
|Toly Arutunoff with Topo in 1967
||Only Toly Arutunoff would buy a brand new
and take it straight to the track!
|Toly racing in Montgomery, Alabama in 1968|
|In the owner's garage, awaiting restoration
|Loaded up and bound for the Team CJ Works
||Bye for now!
|Safely in the Team CJ Works