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+--- Thread: Cam Follower Question ??? (/showthread.php?tid=9769)
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Cam Follower Question ??? - Bluebird7 - 18-12-2024
Cam Follower Question ???
Can a cam follower be replaced without separating the block from the crankcase ?
Guess the valve would need to come out though ??
RE: Cam Follower Question ??? - Ruairidh Dunford - 18-12-2024
You will need to remove the valve, spring, collets, cup and the guide - you may be able to pull the guide up to allow enough room to remove the follower, unless the cam follower guides have been cut down.
Do you have a split follower?
RE: Cam Follower Question ??? - Bluebird7 - 18-12-2024
(18-12-2024, 05:08 PM)Ruairidh Dunford Wrote: You will need to remove the valve, spring, collets, cup and the guide - you may be able to pull the guide up to allow enough room to remove the follower, unless the cam follower guides have been cut down.
Do you have a split follower?
I'm beginning to suspect that's the issue, the 'noise' seems to be coming from the valve train area ???
I'll get a chance to check after Xmas, when I've more time, but I've just been made aware that the cam follower guides 'may' need to be cut down a fraction if running reground followers and camshaft.
RE: Cam Follower Question ??? - Chris KC - 18-12-2024
Is it perhaps possible to withdraw the followers downwards into the crankcase if the camshaft is first removed?
RE: Cam Follower Question ??? - Bluebird7 - 18-12-2024
(18-12-2024, 05:52 PM)Chris KC Wrote: Is it perhaps possible to withdraw the followers downwards into the crankcase if the camshaft is first removed?
If it is a Cam Follower issue, and they can't be removed by Ruairidhs method, I'd rather lift the block upwards.
RE: Cam Follower Question ??? - Ruairidh Dunford - 18-12-2024
I have swapped out a number of can followers over the years, using the method above.
You don’t normally need to remove the block.
RE: Cam Follower Question ??? - Bluebird7 - 18-12-2024
(18-12-2024, 06:31 PM)Ruairidh Dunford Wrote: I have swapped out a number of can followers over the years, using the method above.
You don’t normally need to remove the block.
What's the best way to draw up the valve guides , I'm guessing draw them upwards with studding and nuts ???
RE: Cam Follower Question ??? - Ruairidh Dunford - 18-12-2024
You can also drift it down the way, I presume it is parallel guide, and replace it that way too.
RE: Cam Follower Question ??? - Austin in the Shed - 19-12-2024
(18-12-2024, 05:47 PM)Bluebird7 Wrote:If you have reprofiled followers you probably will have to shorten the bronze guides,and certainly if running a reprofiled cam too.The tappet locking nuts foul them before the follower reaches the cam lobe.I did make and loan a tool to cut them down in situ many years ago.(18-12-2024, 05:08 PM)Ruairidh Dunford Wrote: You will need to remove the valve, spring, collets, cup and the guide - you may be able to pull the guide up to allow enough room to remove the follower, unless the cam follower guides have been cut down.
Do you have a split follower?
I'm beginning to suspect that's the issue, the 'noise' seems to be coming from the valve train area ???
I'll get a chance to check after Xmas, when I've more time, but I've just been made aware that the cam follower guides 'may' need to be cut down a fraction if running reground followers and camshaft.
RE: Cam Follower Question ??? - Bluebird7 - 19-12-2024
Cheers Ruairidh & Austin , looking at the 'Build Sheet' it definitely states the cam was "re-profiled" & I'm sure , but can't find any reference to the cam followers either being re-ground/replaced ???
Also, when checking the noise from the valve area I found at least one valve with a gap in excess of 0.030". It was also fitted with a Silicon block/crankcase gasket, which I guess is much thicker than the paper gasket used in the past. Currently the car is not accessible, but early in the New Year I will rearrange the workshop and check , and report my findings.
Austin inthe Shed, what did this tool look like ? as I may be able to replicate, if ??? the bronze guides are too high . Cheers.