What are the symptoms of a cracked head or block??

[1G90AWDTsi]

Guys, I check the forums for "cracked blocks" and it seems like no one really pin pointed what the symptoms are...do I got one?? I have coolant in the oil without a doubt. My car starts up...no funny noises...full oil pressure...good power...no visible leaks. New block as of 2006 with lots of modding. What are the symptoms of a cracked head or block??

 

[nfernotalon]

Are you sure its not your headgasket? Or maybe your head is warped...

 

[JayRolla]

I would guess its your HG also. Did you have the head decked/machined when the motor was done.

 

[1G90AWDTsi]

yes the head was port/polished 3 angle VJ. It was all done in 2006 and I didn't over heat the motor. It just happened...i let the car sit all winter and every week I go out and start it to circulate the fluids...last week it was fine, this week it wasn't. It has a comedic HG too as of may 2007

 

[nfernotalon]

But was it decked? It has nothing to do with port and polishing it.

 

[1G90AWDTsi]

if "decked" means resurfaced then yes it was...I'm sorry I don't know what decked means...I'm stupid

 

[nfernotalon]

Im still guessing it has something to do with your HG, did they torque the head right? If the block was cracked you would probably be losing compression.. wisemen would be a lot of help right now..

 

[1G90AWDTsi]

thanks, i really hope it's just the HG...

 

[fwspin]

Also guesses HG problems. Are you running stock head bolts or arp head studs????

 

[1G90AWDTsi]

Also guesses HG problems. Are you running stock head bolts or arp head studs????

arp head studs...had them installed when i got the comedic head gasket.

 

[1G90AWDTsi]

could case pressure have caused this, say if my crankcase wasn't getting the pressure relieved enough or something? Just a thought...

 

[01QuadDak]

My money would be on either-
Headgasket leak, when the head was torqued the bolts need to be lubed, otherwise you need to add about 5-10 ft-lbs. Also Copper spray gasket is helpful sometimes.
Turbo leak, if you have a water cooled turbo, your center section may have a crack in it, and this can introduce coolant to your oil through the shaft journals.
Oil cooler leak, this shouldn't be a problem, as you have a 90, and most 90 models have air to oil coolers. If you have a mitsu water to oil cooler, if you have ever overtightened the oil filter, this can cause a leak into the oil system.
Most likely a headgasket, but in any case DON"T drive the car. Antifreeze reduces the lubrication capacity of oil to that of sandpaper.

 

[1G90AWDTsi]

wow, thanks for the advice...is it ok to start it up in order to move it when snow trucks come in to plow???? otherwsie they threaten to tow it. It'd only run for a quick minute just to relocate for snow removal.

 

[1G90AWDTsi]

What tests can I perform to narrow it down? Boost leak? Compression? I do have full oil pressure just like always.