i have a 98 12 valve all mods are in my sig tonight we swap the big turbo from a 27cm exhaust housing to a turbo with a 23cm housing drove it up the road never got over 55psi of boost and brought it bake to the shop and let it run a while came back out and had major blow by look in my radiator and its full off oil could it be an blowed head gaskit os somethin worse i was thinking of re-buildin it cause its got 280,000 miles on it what do you guys think what could i do with the re-build fair as performance goes i thought about making it a 504 is there any other stroker kits out there i tow alot with this truck so i need to keep it streetable let me now what yall think

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so no body wants to give any info on the problem thanks guys your a reel big help

 

oil cooler or head gasket.

 

head gasket ,cracked head or possible oil cooler

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did you have the head resurfaced.

 

sounds like its a blown head gasket

 

agreed head gasket

 

Bad blow by and water & oil mix would think Head gasket...Unless your unlucky like me and cracked a cylinder wall...

 

if it was the oil cooler would it have blow buy real bad i got it all apart took the head to the machine shop to have it check out the head gaskit had two bad places in it but i rely didnt see how that could put oil in the water if anythink look like it would put water in the oil

 

Oil pressure is greater then the water pressure so it could be the oil cooler but i've never had blow by when a cooler cut loose

 

i wished i could be sure its the head gaskit but in my mind i still think its somethin else

 

well if you pull the oil cooler look for one of these