Jump to content

Valve Stem Seals


Recommended Posts

After some recent head work I decided not to refit the valve stem seals fitted by PO. He had bronze guides with the recess to fit the seals.  All back together and working well but a little rattly. Sounds like the valve clearances are out but I have checked them 3 times. Accepting there is probably more clearance between stems and guides, could the rattle noise relate to the stem seals? If so, is it possible to refit without removing the head? Is there a ‘lever’ tool available to facilitate the spring and collar removal with head in situ?

 Thanks 

Link to post
Share on other sites
9 hours ago, colin3511 said:

After some recent head work I decided not to refit the valve stem seals fitted by PO. He had bronze guides with the recess to fit the seals.  All back together and working well but a little rattly. Sounds like the valve clearances are out but I have checked them 3 times. Accepting there is probably more clearance between stems and guides, could the rattle noise relate to the stem seals? If so, is it possible to refit without removing the head? Is there a ‘lever’ tool available to facilitate the spring and collar removal with head in situ?

 Thanks 

Colin

You can make a simple tool to do what you want I will try to post a picture later 

Link to post
Share on other sites

Hi Colin,

I doubt the small valve stem seal could act as a damper/stabilizer. The forces from rockers are very high, and the fragile seals will simply follow any movement, if the would be excessive clearance between stem and guide.

Waldi

Link to post
Share on other sites

Appreciate that Neil. Do you have any experience of noise related to removing the seals?

Thanks Waldi. Just seems strange that the only real difference is the stem seal removal. Not specific to TR's but having googled it there does seem to be a little correlation if they are removed, or if they have failed. I have fitted a slightly higher lift cam, so perhaps it is down to the valve springs maybe? Retained the standard double spring set up.

Thanks,

Colin

Link to post
Share on other sites

Hi Colin, if you’ve got a non standard cam the tappet clearance may well be different than the standard clearances. You probably need to check with the cam supplier.

Link to post
Share on other sites

Did I miss something?

No one has mentioned how the valves are kept up in the head.

'Rope Trick'

Rope in the plug hole that is compressed to hold the valves up with a rising piston

 

Link to post
Share on other sites
11 minutes ago, BlueTR3A-5EKT said:

Did I miss something?

No one has mentioned how the valves are kept up in the head.

'Rope Trick'

Rope in the plug hole that is compressed to hold the valves up with a rising piston

 

Or compressed air 

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Please familiarise yourself with our Terms and Conditions. By using this site, you agree to the following: Terms of Use.