low compression

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low compression

Postby Steve Butram » Sat Jan 01, 2005 10:51 pm

The engine had low compression on all cylinders can you guess why?
Image

and check out the #4 piston
Image

And I found the PO replaced the head gasket upside down.
Image

Sorry fot the fuzzy pix I will work on that in the future.

Steve
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Postby beaconlight » Sat Jan 01, 2005 11:25 pm

Valves stuck open will give low compression every time.
What was in # 4 Was something in it or so much carbon there was detonation.

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Ouch!

Postby Eugene » Sat Jan 01, 2005 11:38 pm

Looks like the tractor has been running with something was loose in the #4 piston for a while. That's got to be the most beat up piston head I have ever seen. Hopefull the cylinder walls didn't take the same beating.

Ah. What the heck. Just think of the fun you can have overhauling the engine.

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Postby Steve Butram » Sun Jan 02, 2005 10:33 am

Eugene. the cylinder wall appeaers to be fine but the piston will have to be replaced.What ever was in the cylinder was gone when I took off the head. Must have been done by the PO.It started and ran fine.but was really down on power it would barely carry the load of the mower when engaged.
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628 2 wheel Trailer
1950 Demo
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Postby Jim Becker » Sun Jan 02, 2005 11:39 am

If the pock marks on the top of the piston are all that is wrong with it, it isn't ruined. I've seen worse reused.
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Postby John *.?-!.* cub owner » Sun Jan 02, 2005 4:32 pm

Are there similiar marks on the head?
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