cam change - oil change?
Discussion
After changing the cam or- in my case- only the lifters, is it important to change back to mineral oil for some time- a new TVR recommendation,as i've been told? Or can I go on with my Castrol. If a change is necessary, why, how long, and which oil? 10W 40?
How can I avoid early damage of a new cam at the first start? Dos it help to use some kind of - word by word translated from german - "run-in-paste" on the lobes?
Thanks for information
Hamlet500
How can I avoid early damage of a new cam at the first start? Dos it help to use some kind of - word by word translated from german - "run-in-paste" on the lobes?
Thanks for information
Hamlet500
You might also want to check out this warning against replacing the tappets without replacing the cam:
www.rpiv8.com/engine-4.htm#worncams
www.rpiv8.com/engine-4.htm#worncams
hamlet500 said:
After changing the cam or- in my case- only the lifters, is it important to change back to mineral oil for some time- a new TVR recommendation,as i've been told? Or can I go on with my Castrol. If a change is necessary, why, how long, and which oil? 10W 40?
How can I avoid early damage of a new cam at the first start? Dos it help to use some kind of - word by word translated from german - "run-in-paste" on the lobes?
Thanks for information
Hamlet500
You can buy special cam lube which supposedly protects it from damage at first start-up after a cam change - spread it all over the lobes and tappets. You can get it from cam suppliers, and no doubt Demon Tweaks do it as well.The tappets should also be soaked in engine oil (obviously not solid versions) for a while prior to installation, preferably several hours.
v8 racing said:
to be totaly honest you may as well just put water in the engine instead of oil, just changing the tappets will scrap the cam within a day of running it, i would seriously change the cam!
So the damage is already done, because I had to drive home some hundred km from the garage after tappet changing.And if I remember the wear of only the worst tappet, a figure looking like an hour glass, I'm sure now, it didn't even rotate. So I can imagine, what happens to the new parts. Kind of learning by paying.
Sorry new cam new tappets, as a rule of thumb new to new on stressed contact parts, its a bit like putting your old main bearings on a new crank etc 
always use a camshaft lube oil this in most cases does not come with a camshaft, however in the past i have used STP mixed with 10% of engine oil.
steve...
always use a camshaft lube oil this in most cases does not come with a camshaft, however in the past i have used STP mixed with 10% of engine oil. steve...
v8 racing said:
hey dont worry mate there are plenty of so called experts that still make those kind of mistakes!! my advise now would be to run it untill it sounds a bit tappety then change the lot in one go.
You are right, but it won't last too long, because I'm also looking for some more than just 266 lb/ft.
Hamlet
, last I heard you'd stuck with the TVR51 and NoS hamlet500 said:
hey dont worry mate there are plenty of so called experts that still make those kind of mistakes!! my advise now would be to run it untill it sounds a bit tappety then change the lot in one go.
You are right, but it won't last too long, because I'm also looking for some more than just 266 lb/ft.
Hamlet
Hamlet, you really need some forced induction, me thinks
If you can get it through tuv that is. Boosted.
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