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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Valve Noise Diagnosis Help in 1991 245 200

posted by  MrNabisco on  Mon Mar 28 11:22 CST 2011
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Oct 22 12:36 CST 2014
[RELATED]


Hi Folks,

I need some assistance diagnosing the noise coming from the top of my engine. I think it is chattering valves and need a valve job...

The brick in question is a 1991 245 B230F M47 with about 197k miles. I have been running a high lift profile came from Unitek in the engine for about 80k miles (stock springs, advanced 6 degrees). I have revved the motor pretty hard at times and probably put wear on the head that way.

The noise:
A distinct valve clatter at different RPM and load settings. Not very loud at idle. Louder under acceleration. Pronounced when the throttle is lifted after gradual acceleration or say if I accelerate from 60 mph up to 70 mph on the highway. That is, at higher revs and under load the knocking is louder. Clatter is there with engine hot or cold.

The valves were super loud and clanky but I put in new rubber valve cushions and adjusted the valve clearance with shims and it quieted down a lot. There is still clatter there though as described above.

I don't think it is piston slap but I'm no expert and don't know exactly what piston slap sounds like.

I do have a spare head which I am preparing to send to a machine shop for a valve job and then swap it in but I'd like to confirm what the valve clatter noise is before I go any further.

Thanks for any help.

Bert






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.