I got the bucket polished on my stiff tappet and got it to slide easily, now im back to checking my clearances again, still got just the one excessive one, .018, book calls for .012- .014, existing shim is a v so being as shims go up a letter for every .001 i will need a z just to get it to top of the tolerance range correct? is there anything past z? i dont think the shims are stackable..

Also, there's quite a bit of upper cam bearing wear, to the point of the center being a totally diff colour. will that be enough to cause an excessive valve clearance?, i thought about swapping top and bottom bearings around and rechecking but my back is aching for now!!!

Thanks

Darren

 

I have located a tappet that is .015 thicker than standard, that being the case, what size shim would i need? its hard to find the sizes of the shims!
keep in mind i have a v shim now and .018 clearance. I would like to see it at .013. Also a vendor to buy just the shims i need would be good too!

 

I'd talk to the guys at Coventry West....Dick Maury if possible. They do tons of Jag cylinder head work. I reckon they can fix you up with whatever you need

Cheers
DD

 

I'll forward this thread over to Dick so that I know he sees it.

 

The shims come in all sizes. We do not use the letters as most are worn off and the replacement shims do not use them. If your cam bearings are worn, they need replacement before you can accurately measure clearance. Check your clearance, mic the shim you have and do the math to determine which size shim you need. You do not mention which size you currently are using so no idea which size you need. Not sure where you found a thicker tappet. Most tappets are stock or machined undersize. We stock a wide variety of shims and can custom cut sizes if needed.

 

The shims do wear where they are in contact with the valve head, and one trick, if you can't get a new one, is to turn them round so the wear side is against the tappet. I once got a really rattly tappet, and it was a bent valve due to it being a bit lazy coming back up after the engine had stood a while, so the piston kissed it.

 

when i get home i will mic the existing v shim and see what it is, but until then, do you guys have the cam bearings? i did a search on your site but it said no matches found.
Here is the link to the oversized tappets i found.
83 1983 Jaguar XJ6 Cam Follower - Engine Mechanical - Original Equipment - PartsGeek im guessing these are a bad idea!

Thanks

Darren

 

We stock the bearings. Our website was just updated and we are still loading the store. We have approx. 250,000 part numbers with 40,000 part numbers usually in stock. Out of that, there are probably about 2000 on the online store at this point. Always best to give us a call if you have a question on parts availability. Thanks for the link to the oversize tappets. Not a bad idea for high lift cams and the like. It should not create any problems unless it is covering up another problem.

 

How about Plastiguage for a far way to check cam bearing to journal clearance.


Probably a better way with proper machinsits tools, but works.


Carl

 

i have plastigage, but im low on it, so i will use whats left when new bearings are installed, i am in this far, no point in messing about, new bearings should increase oil pressure a wee bit too!, then i can measure and order the new shim i need!!, get motor running quietly then back to chasing the damned machine gun sound! im convinced its the flex plate, however i cannot seem to find any loose rivets!!! of course now that cam is out i cannot rotate engine, but i can fix my power steering leak!!! all this while remodeling a condo as a side job and redoing my daughters room too!! im plum wore out!!!

 

Thanks!


Makes my bewilderment with tasks look simple!!!


Back under the Jag later to finish the starter install. More complex than expected. but, I seem to do things the hard way always!!


A fence section to fix amongst other things.


Carl

 

I done went and got sick!!!! i am now well enough to be understood on teh phone so i have ordered my cam bearings and hopefully i am well enough to install and measure valve clearances when they show up!!! wish me luck!!

 

why did cam bearings wear, possibly lack of oil?
maybe restricted oil flow to that area of engine!

how many miles on engine?

 

my guess is the water mixed with the oil from the blown head gasket, The ticking that showed up is what made me check the oil! motor has 85k on it!

Oil pressure is good still!