Hey

Tiny
COUNTRY3216
  • MEMBER
  • 2001 PLYMOUTH NEON
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 166,000 MILES
I have a 2001 Plymouth neon I just bought I replaced the water pump timing belt and the head twice second head I rebuilt with new valves n valve seal I star up my car it runs good but all the oil goes into my radiator the it all of a sudden builds pressure it blows out of my radiator cap and blew hole in 2 radiators put new oil filter n oil in it when I put the second head in and all that brand new oil went right into the radiator
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Thursday, January 28th, 2016 AT 3:32 PM

6 Replies

Tiny
CARADIODOC
  • EXPERT
Are you sure that isn't automatic transmission fluid? Is the engine oil really going low?
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Thursday, January 28th, 2016 AT 3:38 PM
Tiny
COUNTRY3216
  • MEMBER
I am positive it's engine oil there is no oil on the dipstick and I just put 5 brand new quarts in it
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Thursday, January 28th, 2016 AT 3:43 PM
Tiny
COUNTRY3216
  • MEMBER
Started it up started blowing Shit out the radiator and radiator cap oil and antifreeze pours everywhere check the dip stick not a drop
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Thursday, January 28th, 2016 AT 3:44 PM
Tiny
CARADIODOC
  • EXPERT
That would have to be a pretty major leak in the head or head gasket. You might try pressurizing the cooling system to check if you can hear coolant running somewhere into the oil. I don't know how effective this would be for this problem, but if you can find a smoke machine to borrow, you could use that to pressurize the cooling system or the oiling system, then try to see where the smoke is sneaking out.
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Thursday, January 28th, 2016 AT 4:45 PM
Tiny
COUNTRY3216
  • MEMBER
U can take a air blower put it in the oil dipstick hole and the air comes back threw the radiator cap area
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Thursday, January 28th, 2016 AT 4:47 PM
Tiny
CARADIODOC
  • EXPERT
Did you have the head checked for flatness to within.002", and was it checked for cracks? Did you clean the surfaces with an abrasive wheel to get the proper surface finish for the head gasket to bite into?

The next thing would be to use a cylinder leakage tester to determine which cylinder is causing the problem so you can look closer if things have to come apart again. The way you describe it suggests you won't even need that tool. To leak between an oil passage and a coolant passage through the head gasket is very uncommon.

The only other thing I can think of is some engines use an oil cooler that is a disc that sits under the oil filter. It's pretty common for those to corrode and leak the two fluids together on Ford trucks, but I don't recall your car uses one of those.
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Thursday, January 28th, 2016 AT 5:30 PM

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