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valve train
DIY Si - 12/1/09 at 09:19 PM

Evening all.
Just a quick question. When stripping an engine you try and keep all the valve gear in sets, ie valve, springs, collets etc. Does this include the hydraulic tappets too? Just so I don't go and lose them, or bugger anything up.

bigrich - 12/1/09 at 09:39 PM

its good practice to keep all components in order to refit in their original positions

big_wasa - 12/1/09 at 09:41 PM

They should be put back in the same order as they come out in. Each tappet to each lobe of the cam that they where on.

DIY Si - 12/1/09 at 09:46 PM

I only ask, as I have read that with hydraulic tappets it's not so important, as it's ok, apparently, to change the cam without the buckets and vice versa.

blakep82 - 12/1/09 at 10:08 PM

it probably will be ok, but i'd say its best to refit in the same places

MikeRJ - 12/1/09 at 11:06 PM

Cam followers MUST always be kept with their original cam lobe.

Springs, collets etc. are less important, but it;s good practice to keep mating parts together.

[Edited on 12/1/09 by MikeRJ]

02GF74 - 13/1/09 at 09:43 AM

quote:
Originally posted by DIY Si
I only ask, as I have read that with hydraulic tappets it's not so important, as it's ok, apparently, to change the cam without the buckets and vice versa.


the underlying principle of hydraulic followers and solid followers isthe same.

both have a surfcae that spins (or should spin) on top of a cam lobe.

if you remove cam, to refit later with original followers, you should refit the followers, regardless if hydraulic or not, to the same lobe or else use new followers.

It is bad practise to use old followers on a new cam - I am not 100% convince this is the case as long as the followers show next to no wear - but then wheare does one draw the line as to measuing "next to no wear"?

Followers are usually much cheaper than a cam so it is not worth the risk using worn ones to bu**er up a new cam.