i would like to know what solutions you guys have for overheating. ive got a truck with a rebuilt motor thats slowly overheating. takes about a hour of driving to do it. i just replaced the radeater cap and the thermostat. i whent from 192f to 180f. still doing it.
A little info on the truck/engine/trans combo would help. If it's an SBC you can probably find the answer in the tech section of the HAMB. Other brands, other problems . . . maybe....
More info needed. What speeds? In traffic or on the highway? Radiator condition? Same size engine as before? Is there a "spring" in the lower radiator hose? Is there coolant loss ? Is the timing correct and the mechanical and vacuum advances working as they should?
Radiator the right size? Cooling fins in good shape on the radiator? (not brittle and corroded) Fan shroud? Fan working right? (If electric or clutch type) Hoses in good shape? (Lower not getting sucked closed) Right mix of coolant/water? (Water actually cools better than antifreeze, adjust according to weather) Just a few ideas to get you started. I had a daily beater that didn't leak a drop of coolant, but it started running hotter and hotter...when I looked at the radiator, over HALF the cooling fins were GONE! They just rotted and fell out! Also, had a Monte Carlo that would overheat unless the heater control valve was opened...even in the summer! Made for a hot ride, but it was just a beater so I never looked into the problem!
Blocked passage in radiator and/or block. Blown head gasket. Cracked block or head. Waterpump bad. Thermostat bad. Fan too far back to pull air thru radiator. Not enough fan CFM. Not enough venting for engine compartment to get rid of hot air.
i was being sneeky. this is a for a late model shop truck. 80's toyota uuhhgg.. BUT if my work truck blows up, it will set my 29' project back a county mile.
The odds are if this is a new problem to an original cool running truck with no changes or modifications that you have a clogging issue with the block or radiator. Check your electric fan to see if its working too.
[ QUOTE ] Just a few ideas to get you started. I had a daily beater that didn't leak a drop of coolant, but it started running hotter and hotter...when I looked at the radiator, over HALF the cooling fins were GONE! They just rotted and fell out! [/ QUOTE ] Hey man, I had this happen to me too. I check for this all the time now. It was on a "newer" truck as well...'91 S-10....also been like 3 years ago. What I mean is that it happens and not to just old radiators either. Make sure them fins are attached and in good condition. I also had a radiator on another S-10 that was partly plugged. Simple test to see if it is... Warm the truck up to operating temps and then place your hand against the ratiator. Try the middle, try the corner, try another corner....move your hand all around and if you feel any cold spots then its plugged. You probably know how to do all that already, but I find that it never hurts to give or recieve MORE than enough info. Good luck.
To check the fins on your radiator...just run your finger over them applying a little bit of pressue. The fins shouldn't flake off or bend super easily. Apply about as much pressure as you would use when casually scratching an itch...if the fins fold over or fly out...you need a new radiator!
if it is the stock toyota cooling system,look for a high point in the cooling system,you should see a bleed port there(looks similar to a zerk fitting),crack it open whilst filling system,and after it is up to temp. BE CAREFUL,don't burn yourself,crack it open slowly and bleed all the air out. hope that helps ya' later
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