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 Valve stem seals
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melle
V4 Guru

United Kingdom
2563 Posts

Posted - 03 Mar 2013 :  15:48:17 Show Profile Visit melle's Homepage Reply with Quote
Has anyone ever tried something modern like these or any other contemporary valve stem seal variant on a V4?

http://www.skf.com/files/867381.pdf

The standard seals on our engines get brittle with the years and the design is, ehh, not very sophisticated.

1970 96V4 "The Devil's Own V4"
1977 95V4 van conversion project
1988 900i 8V

mettersl
V4 Fan

United Kingdom
103 Posts

Posted - 03 Mar 2013 :  19:10:12 Show Profile Reply with Quote
"Silver" open deck engines have a rigid plastic cap, nor unlike the ones in your picture, its the later black engines that have the fall apart rubber ones. I guess the new type were cost down.I have head heads off to cure that more than once, there was even a special tool to allow replacement without removing the heads.
The more modern types might be worth a try, its back to the future like the silver engines, cant do too much harm?
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pchristy
V4 Guru

United Kingdom
1768 Posts

Posted - 04 Mar 2013 :  09:52:38 Show Profile Reply with Quote
quote:
Originally posted by mettersl
...there was even a special tool to allow replacement without removing the heads.


Take the plug out, shove some rope down the hole, then turn the engine over (by hand!) until the piston pushes the rope up into the head!

You can then change the seals without removing the head!





--
Pete
"Duct tape is like the Force: It has a light side and a dark side, and it binds the Universe together!"
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melle
V4 Guru

United Kingdom
2563 Posts

Posted - 04 Mar 2013 :  10:18:37 Show Profile Visit melle's Homepage Reply with Quote
Compressed air also does the job, you can make an adaptor for the air hose from an old spark plug.

1970 96V4 "The Devil's Own V4"
1977 95V4 van conversion project
1988 900i 8V
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