Job # 1533 (PS) Team CJ cylinder head rebuild  4.2 E Type - stock specs

 
I am pleased to report that your cylinder head rebuild has now been completed. We spent a little extra time sanding and polishing the damaged area on the front of the head - and you can see the results in the photographs below.

Warning! Do not lay the cylinder head flat when you remove it from the crate as doing so will bend a valve!

Technical specs (blueprint) for your cylinder head as follows:

Combustion chamber size - 97cc
All new intake and exhaust seats installed (0.005" interference fit)
All new silicon bronze guides
All new valves
All new cam studs
All new serrated cam stud lock washers
All new valve springs
Intake valves have had new seals fitted
Later style keepers, split collets and spring retainers on intake side
Valve lash (0.004" intake, 0.006" exhaust)
Tappets are new
Camshafts - Stock 4.2 E (OEM) with tach drive in inlet side

Valve stem to guide clearance:

Intake: 0.0010 to 0.0011
Exhaust: 0.0011 to 0.0012

Spring pressure:

Closed = 90 lbs
Open (0.40 lift) = 160 lbs

Shim allocation as follows:

(Intake) #1 .095" #2 .098" #3 .098" #4 .103" #5 .105" #6 .102"
(Exhaust) #1 .111" #2 .110" #3 .110" #4 .108" #5 .109" #6 .109"

Any questions, please feel free to contact me at Classic Jaguar on (512) 288 8800 or by email at techsupport@classicjaguar.com

Here you can see the head being surfaced and the installation of the valve guides and seats, etc. Notice how the water jackets have been re-shaped after the weld repairs.

The following photographs show the various weld repairs in progress. Over the next couple of days I will post photographs of the machine work and re-assembly. We are on schedule to ship the head back to you this week.

Any questions, please feel free to contact me at Classic Jaguar on (512) 288 8800 or by email at techsupport@classicjaguar.com
 

 
I am pleased to report that we now have your cylinder head rebuild underway. The front of the head has been quite badly scored/damaged at some time and is going to take some extra sanding and polishing. Other than that, we don't see any significant issues. I hope you enjoy watching the rebuild unfold!

Any questions, please feel free to contact me at Classic Jaguar on (512) 288 8800 or by email at techsupport@classicjaguar.com