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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 07-28-2013, 10:31 AM
Ron 52 Ron 52 is offline
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Question Oil in my radiator

i seem to have oil oil in my 318i 1998 radiator , but there is no sign of water entering the engine like you would get from a blown head gasget is there a link between the oil and water cooling systems that could cause this proplem. the car is running very well with no water from the exhaust or excessive pressure in the radiator. can anyone point me in the right direction. thanks Ron
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  #2  
Old 07-28-2013, 10:36 AM
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Is it a lot of oil or just a few globules floating in the expansion tank?
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Old 07-28-2013, 12:03 PM
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pics??

auto?? could be trans cooler....check the trans fluid....





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Old 07-28-2013, 12:07 PM
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That'd be pretty odd, since the trans fluid and engine coolant are circulated in two different radiators. Although the trans cooler is bolted to the radiator, there's no interchange of fluids.
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Old 07-28-2013, 10:48 PM
Ron 52 Ron 52 is offline
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Thanks for your replies, its just a few globules of emulsified oil around the filler cap .it could be head gasget paranoia I owned a citreon but only once. oil on the dip stick looks OK and seems to maintain its level. I think i will get the car up on the ramps and have a look at the transfluid although it looks to be a seperate system to me?
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Old 07-29-2013, 02:41 AM
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its fine leave it be
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Old 07-29-2013, 05:58 AM
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Quote:
Originally Posted by Ron 52 View Post
I think i will get the car up on the ramps and have a look at the transfluid although it looks to be a seperate system to me?
It IS a separate system. There's no way for the trans fluid and coolant to co-mingle.
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Old 07-29-2013, 06:15 AM
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Just a little bit won't hurt anything , probably do you some good

Probably picked it up when te fluid was dropped in to a pan and then reused

If you have a lot of lot of oil ... U have problems
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Old 07-29-2013, 07:52 AM
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Originally Posted by Burning2nd View Post
Just a little bit won't hurt anything , probably do you some good

Probably picked it up when te fluid was dropped in to a pan and then reused

If you have a lot of lot of oil ... U have problems
I fail to see how oil mixing with coolant could "probably do you some good"

While, its not good that its in there, I would flush the coolant, and see if it returns. If so, check compression on all cylinders, as this could be a breached headgasket leaving oil in the coolant.
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Old 07-29-2013, 07:24 PM
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Originally Posted by hornhospital View Post
That'd be pretty odd, since the trans fluid and engine coolant are circulated in two different radiators. Although the trans cooler is bolted to the radiator, there's no interchange of fluids.
have a manual, so i was guessing on this based upon many other radiators that i have worked on that were (other than bmw) auto equipped cars........



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Old 07-30-2013, 08:45 AM
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Yup, many auto-trans cars have a heat exchanger for the trans fluid that is within the radiator. If it leaks, you get trans fluid in the coolant. My Blazer is like that. If the blasted thing ever goes again, I at least know the system is good, since I'd just replaced the radiator (with integral trans oil cooler) before the brake booster when kaflooey. It turned into a money pit when it got to 250k miles. Lurch has lurched to a halt.
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