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Bleeding cooling AQ125 Do you need to

J

jamie392

Contributing Member
"I am having non stop overheat

"I am having non stop overheating problems. I've checked everything. I'm wondering if you need to bleed the cooling system when you reinstall a water pump. I changed a seal and reinstalled it and now can't seem to get it to stop overheating.

Raw water flow and suction is great. I have verified it all now. The water pump was in great shape when I took it out. The thermostat is new. Timing belt was changed and I just verified it is aligned well. Timing is set to -6 BTDC. Carb was rebuild but I don't believe it should be the cause of it running hot... Maybe it is too lean.. But would that make 20 degree + difference...

Anyways, do you or can you bleed the cooling system?

Thanks a lot
Jamie"
 
"Was the engine overheating be

"Was the engine overheating before you changed the seal on the water pump?

Air pockets can become trapped in the block when you drain / add fluid. Run the engine with the cap removed from the heat exchanger. When the tstat opens you may see a drop in the level of coolant within. Top off the system and allow the tstat to open / close a few times before replacing the cap.

If the engine previously overheated I would look elsewhere, primarily at the exhaust manifold."
 
"I have a volvo 5.7gxi, boat a

"I have a volvo 5.7gxi, boat and motor have only 85 hours,at idol it heats up to 200f+ once on the plain it drops to 175f.Can some one tell me if this is ok or to hot at idol.THANKS."
 
"Dean,

Your engine should r

"Dean,

Your engine should run at a consistent temp over all operating ranges, within five degrees. A freshwater cooled engine, of your type, should be between 180-190F. How old are your exhaust risers?

For the most responses I advise starting a new thread from the main forum page."
 
"Just to answer my own questio

"Just to answer my own question for future readers, you do not need to bleed the system as is expected. The system will work the air out overtime.

I was looking for any possibly reasons my engine could be overheating after checking every part of the system. Turns out it was a simple cracked fin on the strainer housing allowing water to bypass the heat exchanger
"
 
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