low compression
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Cross-Country
Joined: Aug 2003
Posts: 70
Likes: 0
low compression
Hello I have a 1988 351 in my motorhome. the compression is getting a bit low because of valves. does anyone know of a oil additive that might help this problem until I save enough money to fix it right?
Thanks
Thanks
Cargo Master
Joined: Aug 2000
Posts: 2,931
Likes: 12
From: SW Michigan
compression
panel, what makes you think it is the valves that are the cause of the problem ? Low compression on engines with alotof wear is usually the rings, from my experience. Try some 20-50 oil and see if it improves any. DF, @ his dad's house
Elder User
Joined: Sep 2003
Posts: 908
Likes: 4
Carbon shouldn't be a problem on valves if the engine is running correctly and you drive it properly. Properly means trips that allow the engine to heat up. The only driving pattern that encourages carbon build up is repeated short trips while never driving the engine enough to come up to full operating temperature.
A carboned valve is going to become a burned valve very quickly.
Your mechanic sounds like he doesn't know much. Or, he wants to do you a valve job.
How do you know the compression is low?
A carboned valve is going to become a burned valve very quickly.
Your mechanic sounds like he doesn't know much. Or, he wants to do you a valve job.
How do you know the compression is low?
