Camshaft identification support

E Typ Driver · Post by **E Typ Driver** » Sun Sep 18, 2011 2:13 pm

Dear all,
I am new to this forum and I am currently restoring an E Type Series 1.
As the cylinder has been distorted, I just got hold of a new one with a pair of camshafts.
Now, I would appreciate if you could help me in identifying the camshaft. the following numbers are stamped on it:

P 31818 A
BM4
23GO
for which car have the camshaft been used, etc.?

many thanks
E Type Driver

christopher storey · Post by **christopher storey** » Sun Sep 18, 2011 6:55 pm

I don't think that any of those are identifying numbers ( although the 31818 rings some bells as possibly a late XK camshaft from the 80s) . The Jaguar number will begin with a C followed by 5 digits, and will be engraved on a ground flat area on each shaft . As a matter of interest, how many holes does the front flange of the shaft itself - not the sprocket - have ? If it is 2, it is an original style shaft , with clearances of .004 / .006, and if it has 4 holes it is the later parabolic cam for which the clearances are .012/.014

E Typ Driver · Post by **E Typ Driver** » Mon Sep 19, 2011 6:34 am

Hello,
many thanks - I have been confused by the number starting with a "P..." as I knew that the original Jaguar number starting with a "C..."

The front flange has 4 holes - I need to check the clearances in the next days.
best regards

PeterCrespin · Post by **PeterCrespin** » Mon Sep 19, 2011 2:14 pm

E Typ Driver wrote:The front flange has 4 holes - I need to check the clearances in the next days.
best regards

Hi. What is your name please? We're friendly here :-)

No need to check your clearances, with four psrocket holes they are later cams. The setting for all parabolic cams are 12-14 thou for each side. Note that this is a range, not an inlet/exhaust difference like the original 0.004" and 0.006" figures were.

Pete

ada5 · Post by **ada5** » Tue Oct 18, 2011 7:32 pm

I have a 4.2 65/66 series 1 and am in the process of adjusting the tappets. My car has 2 hole camshafts for both inlet and exhaust, but the exhaust has a groove in the outer edge of the front flange. Does this mean I have an early cam on the inlet and a later one on the exhaust and if so should I adjust the inlet to 0.004" and the exhaust to 0.012/0.014".
I notice in Chris Rooke's book page 94-95 it appears his engine has the same arrangement and he set his to the wider gap.
Thanks for any comments/advice.
David

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Camshaft identification support

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