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Jun 29, 2004 | 08:17 PM

wayneasbell

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running hot

My 77 f100 with 351m continues to run hot after a recent engine swapp. I installed a rebuilt engine from Advance Auto. I have a new water pump, new radiator, new thermostat, new hoses, new fan clutch. My mechanic friend says that maybe exhaust is leaking into the water jacket and causing it to get hot? There is no sign of water in the oil. I have a small leak in the intake manifold on the back side were it is flat. Could that be my problem?

Jun 29, 2004 | 09:51 PM

mark a.

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If the ex. is leaking into the rad. you can smell it with the cap off & it more than likely would be boiling over. I would do a pressure check on the cooling system first.

Jun 29, 2004 | 11:52 PM

FordPickup460

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From: Cab of a truck

Welcome to FTE.
Why do you say it is running hot ? Is the gauge saying its hot, or is it boiling over or doing something else ?

Jun 30, 2004 | 06:11 AM

wayneasbell

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boiling over

The temp gauge is not hooked up yet! the water boils out of the radiator!!! I have only drove it to work twice and it got so hot the engine started boiling the oil through the intake manifold leak. What should the preasure be on the radiator? Or are you refering to puting preasur on the radiator to see if it leaks air through the engine?

Jun 30, 2004 | 09:12 AM

beartracks

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From: Albuquerque

Part of the problem might be the tightness of a new engine. Check the oil pressure sensor behind the manifold to see if it is the source of the leak.

I would check the timing. Are you certain the thermo is facing the right direction?

I wouldn't drive it till I found the problem.

Jun 30, 2004 | 09:18 AM

73Custom

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From: SD

Quote:

Originally Posted by wayneasbell

My 77 f100 with 351m continues to run hot after a recent engine swapp.

Does this mean it acted the same with the old engine?

Marty

Jun 30, 2004 | 01:10 PM

wayneasbell

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The old engine did not run hot. What I mean by continuous is that I have not fixed the problem yet. The intake manifold gasket is pinched where it mates to the block on the rear side. There is a small amount of air leaking through it. Would the leak cause the boil over or do you think the intake leak was caused by preasure and it blew out the weakest point of the intake gasket?

Thanks,

Wayne