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Old 08-29-2021, 08:40 AM   #1
Randy Lausch
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Default Where did my compression go

I have a motor that ran very good, we have let it sit for several years now there is no compression in any of the cylinders. Is there any thing I can add to the cylinders I assume it has to be the rings. Thanks
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Old 08-29-2021, 08:44 AM   #2
burner31
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Default Re: Where did my compression go

Put some MMO into the cylinders and let it soak for a day...try again
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Old 08-29-2021, 09:36 AM   #3
Kurt in NJ
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Default Re: Where did my compression go

Take plugs out and look to see if valves are all moving
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Old 08-29-2021, 09:38 AM   #4
Ruth
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Default Re: Where did my compression go

I agree with Kurt, stuck valves. We had one with two dead cylinders just the other day. Exhaust valves stuck open.
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Old 08-29-2021, 10:53 AM   #5
Patrick L.
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Default Re: Where did my compression go

There is recent thread regarding this that wa started by Grampy.
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Old 08-29-2021, 12:39 PM   #6
jayvee34
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Smile Re: Where did my compression go

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Quote:
Originally Posted by Patrick L. View Post

There is recent thread regarding this that was started by Grampy.
The thread is titled "It ran well when I parked it" is toward the bottom of this page.
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Old 08-29-2021, 11:22 PM   #7
Tom Wesenberg
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Default Re: Where did my compression go

When I bought my 31 Town Sedan it had no compression also. It sat in a garage for several years, and I found the teeth were stripped off part of the cam gear, so it didn't rotate.

Watch the distributor rotor to make sure the cam is turning.
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