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| P60 overheating after valve job |
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Message |
    
David Blakey
Member
Username: catboater
Post Number: 23
Registered: 07-2007
| | Posted on Friday, September 30, 2011 - 09:04 pm: | 
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Just completed a valve job on my P60 to address a compression problem in two of the cylinders. The valve job went fine; engine now starts easily and runs fine, with good compression in all cylinders. But now the engine overheats, where it didn't before. It has a heat exchanger. Plenty of flow through the raw water side, with good discharge through the exhaust. The exhaust water never warms up, though, even
when the engine is hot. I've looked at all the common
problems that cause overheating - checked all the hoses for
kinks, replaced the water pump impeller (even though the old one looked perfectly fine), double checked to make sure I
didn't hook the hoses going to/from the heat exchanger
wrong, made sure the bleed line to the cylinder head wasn't
blocked, etc. My basic question is, is there some common mistake that DIY'ers like me commonly make in the course of
a valve job that would lead to overheating? Can you get vapor lock when refilling the heat exchanger that would prevent circulation of coolant? I suppose the cylinder head gasket might be faulty - holes for coolant passage in the wrong places or something similar, but I got it from a reputable tractor parts house and it looked just like the old one.
I'm out of ideas and would appreciate the insight of anyone who might have encountered this before. |
kevin stone
Advanced Member
Username: kdstone
Post Number: 43
Registered: 01-2009
| | Posted on Tuesday, October 04, 2011 - 04:51 pm: |
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I had a similar problem after a recent complete rebuild. It can sometimes be a challenge to get the air out of the coolant passages, I usually take of the temp sending unit and fill the block from there then replace the sending unit and start the engine with the bleed line off and watch for air or coolant there adding coolant in the heat exchanger as it runs |
tim walker
Member
Username: i_fix_it
Post Number: 6
Registered: 11-2008
| | Posted on Monday, October 10, 2011 - 01:40 pm: |
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Hi David, the most common mistake is flipping the head gasket end for end . O most head gaskets the cooling passages get larger the farther away from the incoming water port you get. This is true on most engines so it's probly the same on our P60's. Hope this helps, Tim |
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