Cronic Overheater
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Joined: Sep 2003
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From: Texas
Cronic Overheater
I've got an '88 F-150 SWB 351W auto that cronically overheats. It's been a great truck, always started and run like a scalded dog, but unpredictably overheats. I've changed cooling components at vaious times, and then finally all at once. That was the water pump, thermostat, radiator, and fan clutch.
Thread Starter
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New User
Joined: Sep 2003
Posts: 23
Likes: 0
From: Texas
Cronic Overheater
Wait! I wasn't finished! Radiator cap too. Anyway, that seemed to have fixed it, but then out of the blue, it got hot going down the road. I know it's not the gage because the hoses swell and it boils over. I pulled over, popped the hood, gave it a desperate look, and by the time I got back in, it was cool. Sometimes it's fine, sometimes it's not.
At the times that it overheats, it seems to get moe powerful. Is it possible that there is a computer flaw that causes the spark to advance sparatically, in turn causing added power and overheating? The mechanic who replaced all of the cooling components checked everythng he knew to check and was baffled.
Also, there is no oil in the water, and no water loss other than to the boil over reservoir, no water out the exhaust. But, the water always turns a rusty brown green after running for a while. Maybe there is a cracked head that only under certain conditions introduced exhaust pressure into the water without allowing it to escape. I had one head machined but it could be the other.
This truck is out of service for these reasons. I love it and plan to restore back to it's prime again one day, and I'm seriously thinking about chucking the 351 and going to a 302. But still, I have to figure this out. I can't let it beat me!
Anybody else ever experience this?
W/S
At the times that it overheats, it seems to get moe powerful. Is it possible that there is a computer flaw that causes the spark to advance sparatically, in turn causing added power and overheating? The mechanic who replaced all of the cooling components checked everythng he knew to check and was baffled.
Also, there is no oil in the water, and no water loss other than to the boil over reservoir, no water out the exhaust. But, the water always turns a rusty brown green after running for a while. Maybe there is a cracked head that only under certain conditions introduced exhaust pressure into the water without allowing it to escape. I had one head machined but it could be the other.
This truck is out of service for these reasons. I love it and plan to restore back to it's prime again one day, and I'm seriously thinking about chucking the 351 and going to a 302. But still, I have to figure this out. I can't let it beat me!
Anybody else ever experience this?
W/S
