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#1
01-09-2007, 06:20 PM
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99' Civic 1.5l Oil mixing with coolant problem.
First off, the car also has a jackson supercharger but I don't think this would cause the problem. The oil is showing up in the cooling system including the overflow. Coolant is think and black with oil. Car also goes through aproxx 2 quarts of oil per gas fill-up. But it doesn't seem to be burning it out the exhaust. Naturally I thought it was a head gasket so I replaced that and had the system flushed. Problem still exists. I visually checked for head cracks the best that i could and didn't see any. My first question is; are there any other spots where the coolant and oil could meet other than head/block? I am not to familiar with hondas aluminum block/head and the piston sleeve system. Also the owner told me the car never overheated (take that with a grain of salt). Do the aluminum engine blocks ever crack? Any ideas would be great, thanks in advance!
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#3
01-09-2007, 09:48 PM
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Re: 99' Civic 1.5l Oil mixing with coolant problem.
It has one of those metal/mesh breathers. It had problems blowing the dipstick out so I think the kid put on the breather to relieve pressure.
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#4
01-09-2007, 10:36 PM
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Re: 99' Civic 1.5l Oil mixing with coolant problem.
Sounds like it has some good blow-by then, if it is blowing the dipstick out. Either by too much crankcase pressure, or some worn out rings. But if you are getting oil in the coolant, sounds like too much crankcase pressure.
How is the can setup? May want to do some reading on Honda crankcase evacuation setups.
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#5
01-09-2007, 11:12 PM
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Re: 99' Civic 1.5l Oil mixing with coolant problem.
Hmm, you might be onto something there with the crankcase ventalation. Could it really go through a few quarts per tank of gas with just ventalation problems? By can setup do you mean catchcan? Because this setup looks to have nothing more then a breather coming off the valve cover.
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#6
01-10-2007, 11:23 AM
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Re: 99' Civic 1.5l Oil mixing with coolant problem.
Yes, too much crankcase pressure can cause the motor to use oil.
I figured the vent you talked about was a catchcan. Until I properly setup my vent system, I would burn oil as well.
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#7
01-10-2007, 01:21 PM
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Re: 99' Civic 1.5l Oil mixing with coolant problem.
Quote:
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