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New Member
- Joined
- Mar 26, 2015
- Messages
- 11
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1996
- Make / Model
- ford
- Engine Size
- 4.0
- Transmission
- Manual
Hello guys i have a question for you all i recently put new heads on my 4.0 and i am loosing coolant and i'm not sure exactly from where its not that much of a leak i have pulled the spark plugs and there is no sign of any coolant from what i can tell they all look the same i also checked compression and that is normal i also replaced the thermostat there is no visible signs of coolant leaking from hose, gaskets,radiator, res tank there is no puddle on the ground the truck runs great i dont smell coolant from exhaust also replaced rad cap the temp gauge is normal temp when driving today after driving most all day long i shut the engine off and was sitting there for about five mins and i hear a thump and rumble from under the hood sounded like it was boiling over the thump is hard enough i can feel iton the floor board of the truck it hammers hard the truck was at normal temp when i shut the engine off i open the hood no sign of boil over water in res tank is the same its cold and dark now even with a flash light i cant see any leaks or steam when it cooled i check coolant in radiator and it was top off like i said i loose coolant not alot but after all the time and money spent i just want some peice of mind i have never heard the thumpimg sound it only happens after i shut the engine off i also made sure i have no air in the coolant and the heatercore is new as well canyou tell me why my truck makes that thumping after i shut it off the engine thanks in advance
