Cooling system issues

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May 11, 2009 | 08:21 PM

fseries8790

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Cooling system issues

I have an 87 F250 with a 5.0 4 speed. Recently put new GT40 heads on and the truck ran fine for a good month or so before i blew the clutch hose. Got it running after that and now when i go to drive it coolant starts to pour out of the overflow tank after only minutes of running. If anybody had some ideas it would be greatly appreciated!

May 11, 2009 | 08:26 PM

393STROKER

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From: houston

Try changing the thermostat and back flush the system.I take a garden hose and flush both heater hose`s and alway flush some rust out.

May 12, 2009 | 09:51 AM

Q in Sac

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Joined: Feb 2006

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Check your thermostat. That's so important. And back flush your motor and radiator. My water temp gauge was bouncing up and down before I did the above. Now it stays solid (N)ormal. Also replacing you heater hoses would help also. My 2.93 cents. lol

May 12, 2009 | 02:37 PM

Lazy K

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Fill the radiator right up to the neck and run the engine. Look for a steady stream of bubbles and smell for exhaust fumes. This should tell you if you possibly have a blown head gasket. To confirm do a compression check.

May 12, 2009 | 02:42 PM

Old93junk

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From: McKenzie River

Lazy K has prob. nailed it...........Not all head gaskets are created equal, and may be a suspect after the head change.

May 12, 2009 | 03:57 PM

phoneman91

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Joined: Jun 2002

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From: Aurora,Colorado

Quote:

Originally Posted by fseries8790

Is the truck overheating when the coolant overflows from the coolant reservoir? Does the temperature gauge show overheating? Have you pressure tested the cooling system??