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Old 04-12-2009, 10:39 AM   #1 (permalink)
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coolant leak in intake

My '95 has allways had coolant leaks and from repairs done by previous owner it looks like it allways has. I have been working on cars for 30yrs but this is my first beemer. I recently was driving allong on a clear day with no flooding and it started to over heat so i pulled over and refilled. When I restarted the engine sounded like it threw a rod and water was pouring from somewhere in the rear of the engine. Due to the fact I was 2-1/2 hrs from home I had it towed to a freinds house till I can come get it with may trailer.
A week later I got back to the car and went to put it up on the trailer and the car started easily and sounded fine with the exception of the severe water leak witch was still there. After getting it home I discovered the water leak was coming from the bottom of the intake manifold a vac hose had come off and it was coming out of it. After taking the air cleaner box hose and throtle body off I discovered the plenum full of water mixed with oil. After removing the manifold I found cylinders 3,4, and 5 full of clean water. The only places the water can come from is either the pvc of throttle body.
After inspecting the throttle body I found it clogged solid with stop leak(hoses included). There isn't that much water on the dip stick so im not sure it came from the pvc even tho I haven't removed the valve cover yet. Im at a complete loss as to where so much water got into the top of the plenum, any suggestions will be greatly appricated.
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Old 04-12-2009, 08:44 PM   #2 (permalink)
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It sounds like a blown head gasket.......if you found water in any of the cylinders.....its either a blown head gasket or warped head.......

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Old 04-17-2009, 08:12 PM   #3 (permalink)
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agreed, that's most likely your problem.By the way, bmw's are infamous for their cooling systems, so if i were you, i'd invest in a cooling system kit with new radiator hoses and all. it will save you time and money in the future since the old plastic parts are bound to fail again.
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