My husband drives an older Toyota 4Runner. Lately, he has been having a problem with getting oil into his coolant. At the shop, they did a full system flush and found nothing. They put pressure on the radiator and found no leaks. The head gaskets are fine. The leak is in only one direction ---> from the engine to the radiator (which I guess doesn't make any sense, because it should be going both ways). Everyone is baffled by this problem, even the mechanics, and can't figure out how he is getting oil into his coolant without coolant getting into his engine or leaking. Has anyone out there had a similar problem and if so, what was the cause? Or does anyone have any legitimate ideas? He just replaced the head gasket...that is not the problem! Professional mechanics have looked at this every which way and can't figure it out! Only serious answers please!
2006-09-21 20:25:16 · 8 answers · asked by J Fisher 1 in Cars & Transportation ➔ Maintenance & Repairs
Check to see what sort of oil is getting into cooling system.If engine oil the head is probaly warped and leaking from the oil supply to the valve train.The jap castings are machined green,that is straight out of foundry to machine shop and no time for weathering so they warp with time..Also check block for warpage while the head is off,if its warped you can fix that with draw filing.
2006-09-22 00:41:44 · answer #1 · answered by frank m 5 · 1⤊ 0⤋
well i am dealing now with a situation that is close to that. first, oil in the water but not the other way means that the oil is always higher pressure than the water. oil pressure in the system is 25-80psi and water in its system is 20ish. I am surprised that someone changed the head gasket since that would only solve a water in the oil problem. (water @20 psi leaking into the crankcase @static pressure) how quickly is the oil getting into the water? My best idea here is that if is not the trans fluid going into the radiator ( an internal leak that would have no external evidence) then there is either a crack or corrosion hole in the intake or block that is between a oil pressure passage and a coolant passage. best of luck
2006-09-21 21:02:04 · answer #2 · answered by hikinbiker1 1 · 0⤊ 0⤋
Well lets see, I know you said the head gasket is new, but that doesn't mean that it was installed correctly. If it is in place and seated good, and you are sure it is motor oil and not transmission fluid, then the head could be warped or cracked. If it is not the head then the block has to be cracked. The crack may be internal, or so small that you can't see it, but it is there.
2006-09-21 22:13:33 · answer #3 · answered by smoke 4 · 0⤊ 0⤋
I know you say its not the head gasket but more than likely it was not installed correctly and did not make a good seal. Usually done by incorrectly seating the gasket.
2006-09-21 20:56:12 · answer #4 · answered by Adam 1 · 1⤊ 0⤋
Possibility of oil from his transmission coolant radiator leaking into engine coolant.Regards Mick.
2006-09-21 21:22:30 · answer #5 · answered by mick 6 · 0⤊ 0⤋
I would suspect the head gasket first, possibly the head wasnt flat before the new head gasket was fitted
2006-09-21 20:35:34 · answer #6 · answered by Nimbus 5 · 0⤊ 0⤋
so let me get this straight,
you are married to a car!?
get a new husband, uhh, I mean car......
2006-09-21 20:26:55 · answer #7 · answered by Anonymous · 3⤊ 0⤋
is he a Terminator?
2006-09-21 20:27:29 · answer #8 · answered by Evel Man 3 · 1⤊ 0⤋