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Old 05-13-2003, 04:23 AM
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Post over heating

I'm having an over heating problem in my 29 Ford w/350. I suspect it is a air lock because only the top end is hot while the radiator is cold. I took the thermostat out and found it was faulty so I reassembled it without the thermostat
, left the cap off to watch the flow and within 30 seconds it started boiling.This is a new engine with a high flow Stewart water pump. What's the best way to remedy this problem?

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Old 05-13-2003, 06:05 AM
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Don't want to question your observation, but I really find it hard to think it would 'boil' after 30 seconds- w/the high flow pump is what you're seeing just water rushing through the radiator? Also without a thermostat an engine will run hotter. Replace the thermostat and run the engine without the cap to dispel any air. Then replace the cap and get it up to temp. If you then see a hotter than normal reading and the radiator is cold, check your gauge. If you still have an overheating problem, it would be time to check radiator air flow, fan, and maybe block restriction if it is newly built... Just my opinion and good luck jim!
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Old 05-13-2003, 06:21 AM
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Impossible to boil an engine in 30 seconds from a cold start. Something else is going on. If by 'boilong' you mean a froth is coming out of your radiator, then you likely have a blown head gasket and that is combustion gasses mixed with radiator water that is foaming out.
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Old 05-13-2003, 10:03 AM
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CK your oil for a baby **** froth, an indication of water in the oil. I agree, reinstall a thermostat and run the engine with the cap off for a while, that high volume water pump may make the water look like its boiling, but steam is the best indication of boiling water. What temp does your gage tell you your engines running at?


Todd


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Old 05-13-2003, 11:23 AM
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The engin was hot(top end, heads, intake manifold ,return hose). I drained the coolant out the pit**** and the liquid was cool. I then removed the thermostate reinstalled the hose and refilled with a 50/50 mix. By this time I could touch the heads and hose and they were just worm. I left the cap off to see if the coolant was flowing, fired it up, looked and saw no movement of coolant, looked at gauge and it was almost pegged, saw a puff of steam and coolant gushing out like a gyser and shut it off.This took place in under 30 seconds.The oil looks fine and the coolant I lost looked normal. This suckers got me beat and I have four aces. Every thing is new on the engine.This sucks.
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Old 05-13-2003, 05:12 PM
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Sounds to me like you are getting an air pocket in there. Do you have a heater in the car? If you do, make sure that you have the heat control in the hot position to allow coolant to flow thru the heater core. What I usually do is>> don't completely fill the radiator, and leave the cap off. Start the engine and allow it to run for a few minutes, then shut it off. The block will heat up the coolant inside and open the thermostat, and usually allow the air to escape thru the radiator. After it has burped, you can fill the radiator to the proper level. That usually works for me. It does work easier if you have a recovery tank that it can burp into.
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Old 05-14-2003, 04:11 AM
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Thanks guys, it was an air pocket. She burped lowder than a three day beer binge. She's up and running at 195 degrees.
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Old 05-14-2003, 04:55 AM
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I was fearful of a block restriction since you had no thermostat... glad to hear it was simple!!! Now enjoy that new engine!!!
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Old 05-14-2003, 06:10 AM
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[quote]Originally posted by jimhummel:
<strong> She burped lowder than a three day beer binge. She's up and running at 195 degrees.</strong><hr></blockquote>


Had a girl friend who did that once. She never got up to 195F though.
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