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Coolant in the oil! Please help!

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Old Jun 7, 2013 | 12:21 PM
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Default Coolant in the oil! Please help!
I just picked up a 98 z28. The previous owner said he bent a push rod so he replaced them. Well now the car back fires on start up and has coolant in the oil. Any ideas on what could cause this?
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Old Jun 7, 2013 | 02:59 PM
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a blown head gasket can cause that. But is there a lot of coolant in the oil? or is it just on the oil cap/lid.

Id run a compression test to check if you have power on all 8 cylinders.
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Old Jun 7, 2013 | 03:03 PM
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No it's mixed in the oil pretty good. And what would low pressure in a cylinder mean?
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Old Jun 7, 2013 | 03:08 PM
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Head gasket(s). ^^^
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Old Jun 7, 2013 | 03:10 PM
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Originally Posted by ThrelkeldsZ
No it's mixed in the oil pretty good. And what would low pressure in a cylinder mean?
It means that there is en escape somewhere, and most of the time it happens to be the head gaskets. Does the car overheat when idling or feel sluggish when accelerating?

EDIt, if the coolant level seems to run low with no external leaks, and the oil has that brownish creamy color to it, you more than likely have a blown head gasket.
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Old Jun 7, 2013 | 03:13 PM
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now would be a good time for some 241s or 243s
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Old Jun 7, 2013 | 03:17 PM
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Yea the guy said it felt like it lost power when he drove it.
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Old Jun 7, 2013 | 03:24 PM
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Head gasket or even a cracked head, did he overheat it ?
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Old Jun 7, 2013 | 03:25 PM
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there you have it. bad head gasket. Look into some 241 or 243 heads or at least an ls6 intake to make your work worth while. The labor will have to be done either way.
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Old Jun 7, 2013 | 04:21 PM
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If it's been driven much at all with coolant in the oil you likely also have ruined main, rod and cam bearings. Very possible the rings and cylinder walls have been damaged too. STOP DRIVING IT!
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Old Jun 7, 2013 | 04:26 PM
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Well the car is gonna be a DD for my 19 yr old sisters so it won't be modded just yet other the the lts and lid that's already on it
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Old Sep 12, 2019 | 07:33 PM
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gasket leak.
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Old Sep 14, 2019 | 12:11 PM
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Put 243s or 799s on it anyways because it's likely that it overheated and cracked the head as well. New gaskets, new heads and good to go. You should be able to find 799s on Ebay for 500 bucks or so.

If someone cant diagnose a head gasket faliure and continues to drive it around it will superheat and cause many more problems then just a bad gasket.

You will also need 99+ year valve covers with a bracket to mount coil packs onto it. Or find yourself some 98 heads. If your in Arizona I have a set in my garage.
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Old Sep 14, 2019 | 12:22 PM
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6-1/2 year old thread revival....
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Old Sep 14, 2019 | 01:04 PM
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Oh good, Why does this keep happening? Becoming obnoxious.
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Old Sep 14, 2019 | 02:26 PM
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Check the user. Same guy brought back a few from the dead
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Old Sep 14, 2019 | 05:27 PM
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Originally Posted by Darth_V8r
Check the user. Same guy brought back a few from the dead
MORE than a few....
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Old Sep 17, 2019 | 05:29 PM
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Originally Posted by G Atsma
6-1/2 year old thread revival....
My man on point!

**** I'm glad we have you.
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Old Sep 18, 2019 | 10:56 AM
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Originally Posted by LilJayV10
My man on point!

**** I'm glad we have you.
Glad ya like it.. LOL This guy has been dragging up about a dozen old threads and replying with obvious one- or two-word answers.
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Old Sep 18, 2019 | 04:35 PM
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Originally Posted by G Atsma
Glad ya like it.. LOL This guy has been dragging up about a dozen old threads and replying with obvious one- or two-word answers.
Well I was actually being sarcastic....

It's something new the cool kids are doing.
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