LT1-LT4 Modifications 1993-97 Gen II Small Block V8

blown head gasket

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Old 09-09-2007, 02:47 PM
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Default blown head gasket *video*

pretty sure the head gasket is leaking, I have smoke coming out the exhaust looks to be white , one odd thing is that i didnt notice any colant loss.
The heads have alot of oil sludge under the valve cover so rebuilding them would be a good thing.
Could the smoke be from bad spark not buring off gas?
Want opinions if it looks like its colant burning
video is 5 sec after starting from cold

Last edited by C5042081; 09-09-2007 at 04:46 PM.
Old 09-09-2007, 03:03 PM
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Is it coming out the back of ur exhaust? I noticed white smoke coming out from under my engine, turned out to be oil leaking from the intake manifold, and dropping on the headers.
Old 09-09-2007, 03:10 PM
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Originally Posted by Hark_Z
Is it coming out the back of ur exhaust? I noticed white smoke coming out from under my engine, turned out to be oil leaking from the intake manifold, and dropping on the headers.
yuppers, check video above
car starts right up no problem idles ok
problem started on way home from the track a few weeks ago

Last edited by C5042081; 09-09-2007 at 03:15 PM.
Old 09-09-2007, 05:52 PM
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Does the exhaust smell sweet? Run your finger around the tailpipe, see if there is any fluid there.

If you see sludge probably so. Is it milky looking? You'll know, its this light mud looking glop. Sucks, just pull the heads and upgrade, I did springs while I had the heads off, easier to do them that way I thought.

It wasn't very clear to me where the gasket had gone wrong til I had the heads off, my #7 piston was tinted slightly green and was clean, only cylinder that had coolant sitting in it on the driver side also.

Had coolant in all my passenger side cylinders, I didn't get the knock sensor out til after I pulled the heads, what a mess. Whoever writes those damn books need to state that you def. need to pull the knock sensor to drain the whole block, not maybe.
Old 09-09-2007, 09:44 PM
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The smoke has a smell to it, I am going to drain the oil and check that out tomorrow, all things are leaning towards a head gasket, I only ran the motor for mins since it happened and everything sounds fine inside.
Old 09-09-2007, 10:02 PM
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that sucks bro. hopefully its not that.. but **** happens. get her fixed and be back on the road.
Old 09-10-2007, 03:03 PM
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ya kinda has me bummed out but then again gives me a good reason to do a H/C swap and some LT's
Old 09-10-2007, 04:20 PM
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yup! there ya go. keep it positive. did u have ur fans tuned for your 160*? if so what temp on an off?
Old 09-10-2007, 06:46 PM
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If possible try to find the reason.

For me my hypertech 160 thermostat failed closed. Grab a Be Cool 170 while you are rebuilding, they are guaranteed to fail open.
It seems hand held tuners aren't the only bad thing hypertech makes.
Old 09-10-2007, 07:56 PM
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didnt have the fans tuned, never thought to check to see if the stat was working, bought it new a week prior. The temp seemed to be very good.

I do have quite a bit of moisture in the exhaust/tips



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