New Pony In The Stable..

05stroker

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Well, after 30k, it dropped a valve a couple weeks ago and damaged one of the heads enough to split the oil galley in that head and starve both banks to oil. So, I pull it apart, get the new parts coming, and have the damaged cylinder re sleeved and a set of heads gone though. So I assemble the motor and install it this weekend. Start it and all is good. Go for a test drive and come back to the house and check the oil and I have tanted oil. Fucking block is cracked and letting oil into the cylinder. My machine shop showed me the crack in the deck but it was only between the water jackets so I assembled it. Now it is leaking into cylinder number one. I have the water drained and will pull it back out tomorrow and have his stock block to the machine shop to get prepped.

I still don't understand how the water can seep into the cylinder while the car is just sitting there with were the crack is, but it is. FML, that's what I get for reusing the block. We were all confident that the crack was beyond the compression seal.
 
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05stroker

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On a litter note, we have a '13 TVS on the way and are huntting two 6r80 transmissions for both cars now.
 

eighty6gt

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How was the DOB manifold passing coolant? That's not great.

Also, dob uses an o ring between the blower and intake? That is great.
 

05stroker

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There is no way this small crack caused the amount of water I was seeing.the head gasket looks good . Its like the head gasket did not seal or something. The small crack is beyond the compression seal and the sealant on the head gasket is perfect. A half mile drive resulted in milky oil and one hour on the garage after the drive resulted in a half of a cylinder with clean water in it.

The block has sat all day with water in it and not a drop leaked.

What do y'all think?

 
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swflastang05

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There is no way this small crack caused the amount of water I was seeing.the head gasket looks good . Its like the head gasket did not seal or something. The small crack is beyond the compression seal and the sealant on the head gasket is perfect. A half mile drive resulted in milky oil and one hour on the garage after the drive resulted in a half of a cylinder with clean water in it.

The block has sat all day with water in it and not a drop leaked.

What do y'all think?


I agree that crack is not likely to be the culprit. Were torque plates bolted onto the block at all during the most recent machining? I've had 2 blocks fail from bottoming the head studs and cracking the block resulting in a milk shake. A machinist could do this while bolting down the torque plates if they don't know better, maybe a new guy that day, etc., it is possible even though you know better and didn't do it yourself. If you really want to know where it's leaking, after you pull it apart (remove the RA) reinstall the heads and reconnect the cooling system enough to pressurize it and see where the water comes from. You can reuse the old head gaskets for this test, won't cost anything but some time then you will know for sure. You can also fill all the head bolt holes with water and let it sit overnight, check the next day to see if any have leaked down.
 
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05stroker

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I agree that crack is not likely to be the culprit. Were torque plates bolted onto the block at all during the most recent machining? I've had 2 blocks fail from bottoming the head studs and cracking the block resulting in a milk shake. A machinist could do this while bolting down the torque plates if they don't know better, maybe a new guy that day, etc., it is possible even though you know better and didn't do it yourself. If you really want to know where it's leaking, after you pull it apart (remove the RA) reinstall the heads and reconnect the cooling system enough to pressurize it and see where the water comes from. You can reuse the old head gaskets for this test, won't cost anything but some time then you will know for sure. You can also fill all the head bolt holes with water and let it sit overnight, check the next day to see if any have leaked down.

Torque plates are always used at the shop I use.
The strait water in the oil drain at first suggest that the
Head gasket did not seal or I fucked up torquing the heads, and I have done this a few times, meaning torquing the heads. I have the '07 block getting prepared now, I'm just trying to decide what to do with this one.
 
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swflastang05

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I always got straight water at the oil plug at first when I had my block issues. I would bolt the heads back on and pressurize the cooling system to see where it's leaking, you can easily look into the crank case without the RA in there and get a good look at what's going on. It would be interesting to find out for sure what the issue is.
 
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