The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

I Lash... 120-130 1967

posted by  Phil S. on  Fri Feb 3 10:52 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 24 13:18 CST 2014
[RELATED]

The valve train will tighten up as much as .002" going from cold to normal operating temp, which is why I always suggest setting lash fully hot. It's also why I don't make much sense out of the "hot or cold" in the Green Book specs.

I don't understand how seat pressure is affected by thermal expansion, as long as there is some lash. Surely you don't mean heating ate up anywhere near .018"?

There is a related problem with seat recession, though... once the seat starts receeding at all, you lose spring pressure. Reduced spring pressure accelerates the rate of recession (reduced heat transfer? Valve bounce?). You can lose all the lash in that vicious cycle.

This also seems to relate to wiped cam lobes -- I often see bad lobes and receeded seats match in any particular motor. Not sure end is the chicken and which is the egg.






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.