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Head Gasket Failure

 
Old 01-12-2019, 04:08 PM
  #21  
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Well something is definitely warped. Cleaned everything up and did a test fit without the gasket. The head does not sit flush with the block. When I put the head in place I can sort of rock it back and forth like if was bowed in the middle. I have a video that I'll post once I figure out how to do it .

The head was refurbished at a reputable machine shop so I wonder if it's the block. Man I hope not .
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Old 01-12-2019, 04:17 PM
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https://youtu.be/PM7d2J-k7BQ
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Old 01-12-2019, 04:19 PM
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Originally Posted by Smitty454
https://youtu.be/PM7d2J-k7BQ
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Old 01-12-2019, 04:42 PM
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yeah thats no bueno
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Old 01-12-2019, 04:46 PM
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Wow.

I would take a steel or aluminum ruler, level or anything with a straight machined edge and place it across the head and block to see which is warped. Shine a light behind it and see if you can see the light on the other side. If you can, check it with feeler gauges. I've got a feeling it's too far to repair but you never know.

I hope it's the head(s) as they are cheaper and simpler than replacing the block.
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Old 01-12-2019, 06:30 PM
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Update! Nothing is warped! It was the GD locating dowels!! I ordered new ones but apparently thet aren't as easy to insert as I thought. What's the proper way to insert these? I lightly tapped them with a mallet but that obviously wasn't sufficient. It seems like one goes in much easier than the other
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Old 01-12-2019, 07:12 PM
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i smash em in with a ball peen. is there something stuck in the head?
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Old 01-12-2019, 07:50 PM
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Originally Posted by LS1 pwrd NOVA View Post
I have a problem on my #7 cylinder also. My plug is always fouled and I am getting smoke out of the drivers side pipe only.
My smoke is oil related vs water related, This engine does have over 200k miles on it.
Have you done a coolant pressure test? I did on mine and no issues but I still get water out the driver tail pipe vs the passenger side tail pipe. I know we get condensation, but I see water droplets on,y on one side.
We also did a quicky compression test and #7 was within spec with the others I tested.
Last thing is to do a leak down test but with all the things weíve seen itís internal.
I think I am just going to have to pull this lq9 and rebuild it.
If it's oil fouled then it could be from either worn out guides or valve stem seals in the heads or worse the piston rings.
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Old 01-17-2019, 08:07 PM
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Originally Posted by 01CamaroSSTx View Post
If it's oil fouled then it could be from either worn out guides or valve stem seals in the heads or worse the piston rings.
‘replaced the all valve stem seals, didn’t make a difference.
may be the rings but it has good compression. Unless the oil is sealing it up to get a good reading.
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Old 01-18-2019, 09:21 AM
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Originally Posted by LS1 pwrd NOVA View Post


Ďreplaced the all valve stem seals, didnít make a difference.
may be the rings but it has good compression. Unless the oil is sealing it up to get a good reading.
Sometimes ring issues don't rear their ugly head until the engine heats up some. My rings didn't seat on the 7 & 8 my first time out and as a result the the plugs kept getting oil soaked. It wouldn't start smoking right away but once it heated up you could see the blue haze and when you got into the throttle and then came out of it you'd think I was out there spraying for mosquito's. Have you run a leak down test on the engine?
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Old 01-18-2019, 09:27 AM
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Since you have it apart it wouldn't be a bad idea to go through the cylinders with a flex hone to clean them up and install new rings.
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Old 01-18-2019, 01:33 PM
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Originally Posted by 01CamaroSSTx View Post
Sometimes ring issues don't rear their ugly head until the engine heats up some. My rings didn't seat on the 7 & 8 my first time out and as a result the the plugs kept getting oil soaked. It wouldn't start smoking right away but once it heated up you could see the blue haze and when you got into the throttle and then came out of it you'd think I was out there spraying for mosquito's. Have you run a leak down test on the engine?
ĎThatís exactly what it does. Cold start not really any smoke or very faint smoke.
ĎOnce itís warmed up and driving around, itís smoking and definitely smokes on deceleration bad.
ĎJust like if Iím smoking for mosquitoes also.
ĎNo no leak down test yet and I may not as Iím pretty sure itís the rings now with all the reading and posts.
ĎI just have to pull it and rebuild it
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