bmxunderground
15+ Year Contributor
- 217
- 4
- Dec 11, 2007
-
Bowling Green,
Kentucky
Build: ported polished head (purchased from user)
ARP head studs
Cometic HG
I put everything together and bolted the ARPs 25-30-50-85 (moly lube)
after only five to ten minutes of running on initial start up, I let the car cool down, came back after work to top off the coolant and when I squeezed the upper radiator hose, oil came up to the top of the pipe. Also noticed a small amount of coolant dripping from the bottom left area you see in the pic below.
I purchased this fully built long block from another user who said he blew a head gasket. After tear down, I believe that was the cause. there was coolant mixed in the oil, all throughout the engine. There was however, no oil in the coolant from what I could tell. Now I have cleaned everything up, assembled the engine with new gasket + different head and the opposite was happening immediately, oil in the coolant but not vice versa.
Likely suspects:
-error in ARP torquing
-flawed HG
-warped head
-block surface uneven or warped
-cracked water/oil jacket bleeding into eachother
-dowel fit issue.
My two main concerns were a crack in the block, but how common is that? and the other was that the OEM surface of the block was not smooth or flat enough.
If there were a crack in the block big enough to transfer oil in just at five minutes, wouldn't that be visible? the car didn't even have time to fully warm up yet to expand a crack I would think. Second, the block surface seems to be semi porous not smooth, shouldn't it be as smooth as the head?
I'm really hoping its anything other than a crack. wisemen chime in now possibly? give me a "that happened to me" story, to steer my hunting before I waste more time and money.
ARP head studs
Cometic HG
I put everything together and bolted the ARPs 25-30-50-85 (moly lube)
after only five to ten minutes of running on initial start up, I let the car cool down, came back after work to top off the coolant and when I squeezed the upper radiator hose, oil came up to the top of the pipe. Also noticed a small amount of coolant dripping from the bottom left area you see in the pic below.
I purchased this fully built long block from another user who said he blew a head gasket. After tear down, I believe that was the cause. there was coolant mixed in the oil, all throughout the engine. There was however, no oil in the coolant from what I could tell. Now I have cleaned everything up, assembled the engine with new gasket + different head and the opposite was happening immediately, oil in the coolant but not vice versa.
Likely suspects:
-error in ARP torquing
-flawed HG
-warped head
-block surface uneven or warped
-cracked water/oil jacket bleeding into eachother
-dowel fit issue.
My two main concerns were a crack in the block, but how common is that? and the other was that the OEM surface of the block was not smooth or flat enough.
If there were a crack in the block big enough to transfer oil in just at five minutes, wouldn't that be visible? the car didn't even have time to fully warm up yet to expand a crack I would think. Second, the block surface seems to be semi porous not smooth, shouldn't it be as smooth as the head?
I'm really hoping its anything other than a crack. wisemen chime in now possibly? give me a "that happened to me" story, to steer my hunting before I waste more time and money.
You must be logged in to view this image or video.