Dear,

we are ready fixing of cylinder heads and have to assemble the engine. This is V12, 1976, pre-HE engine.
Now the question. During dismounting found out one of the pins between camshafts and sprockets was missing. What is the purpose of this pin?
We can not find it as spare part, how important is this pin? You can find this pin at the scheme as number 11. Best Regards, Stan

 

Stan,

That is an oil plug, goes in the hole in the snout of the camshaft, stops the oil flowing straight through the shaft.

C33244 is the Part Number. Listed as NLA, but maybe Google etc will find you one.

You WILL need something in that hole.

 

This would seem to be it:

https://www.ebay.ca/itm/155315505333...mis&media=COPY

 

Thanks for explanation,
I believe is not a problem to make it
on lathe from steel. We have one to make measurement.

 

Stan,

Well done! The block and heads look great!

Silly question, but is there a reason why that timing chain sprocket isn't square to the camshaft? Is it not bolted up properly yet?

Paul

 

Yes, it is not bolted, waiting decision about pins.
Are they 2 pins ( for each camshaft)?
If they are plugs maybe aluminum will be the better material to make it?
BR
Stan

 

Hello,

We found out that only driver side (EU car) camshaft has hole at the end.
The passenger side don't.
So, it has sense that one pin/plug (passenger side bank) is missing.
Please confirm.

Best regards
Stan

 

Never noticed in all the engines I have been inside of.

BUT

If one is plugged, and the other is blank, as cast, move on, all is well in Jaguar Land.

 

Hi Francis,

Your experience shows plugs in all camshafts?
Strange, maybe one of our shafts has changed
…
BR Stan

 

That is a mighty long hole the factory had to drill through the camshaft for an oil passage if it was a forging.
Easiest to drill from both ends, so you need a plug in each end.

For a camshaft that is cast you can probably make the hole in the casting pattern. However such a long small hole might not end up being totally clear, so you might run a drill through it from both ends to be sure. You still need to plug both ends.

It is a low pressure oil gallery, easy to make a plug out of anything. In the factory they would use an interference fit. I would make an undersize plug and use bearing grade Loctite.

 

Stan,

This has bugged me all night.

Went to the shed, found an OLD, like me, Part Book, the printed type, not this online rubbish, and there are 4 plugs per engine, from carby to late 5.3. It does not cover the 6ltr.

My original thoughts were that the A Bank shaft "MAY" have an oil bleed hole to lubricate the "wet side" of the chain, and that plastic Boomerang, but it appears NO.

Have fun.