Read a few forums about this but I think my situation is a little different. d16y8 stock internals, 7lbs boost, street tuned on crome. Just picked my car up from the shop and ever since it has been overheating from prolonged driving or using boost frequently. Ive gone through over a gallon of coolant. Seems i'm losing it through the overflow. The overflow tank gets hot and boils the coolant away. No leaks, coolant free of oil, oil free of gunk. Because of this I don't think that it is a blown head gasket, and i'm pretty sure the thermostat didn't magically malfunction after turboing the car. Any ideas?
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PAXIL PROBLEMS

 

well, if it happened immediately after the turbo install... take it back to the shop and say WTF,

 

easier said than done. My car wouldnt make the trip, the shop is an hour and a half away. If they tow it with no charge to me i'll be down.
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ShyMama

 

That's called headlift. Welcome to Crome and Dseries.

You need to have the car remapped with less timing in boost. Change the headgasket as it's shot, make sure the head is still level, and then drive it back and have them take out timing.

OR!

Order ARP headstuds and redo the headgasket and all that garbage. Torque the studs to about 65 ft/lbs and see if you run into the problem again.

 

^ agreed, and for the llove of god, grab an oil cooler.

 

How long ago did you replace your radiator cap? Might want to buy a new one of those too. A lot of people think they just last forever and don't replace them until they get a new radiator.

 

I understand what you guys are saying but i am almost possitive it's not a blown head gasket, good recommendation for headstuds though, still could use them. Think I just found the problem to the cooling as well as why my idle has been at 1100-1200. Wastegate was hooked up to a vaccum source on the intake, but the vaccum line had slipped off. As for the cooling, I let the car run for 15 minutes and then drove it around the block to warm it up. While driving i lightly boosted in second and the temperature shot up from like 50%-80% up the gauge within a matter of seconds. When i got back i noticed there was not only steam coming from the boiling overflow but from the radiator cap as well. I took the cap off, and there was no pressure released! The cap seal looks like its way overdo for replacing. I'm thinking the leak in pressure from the cap is what made the heat rise so quickly because my waterpump works but how well is the coolant going to circulate without pressure in the system. I'll replace the cap and see what happens. Thanks for the suggestions.
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Review portable vaporizer

 

Still haven't figured out root of problem but car is driveable for fairly long distances. Replaced radiator cap which helped a lot. Set up the radiator fan to blow all the time and removed the radiator. Huge improvement in cooling. I also compression tested with surprisingly great numbers. Oil is still viscous and pure. Going to see about getting a clutch installed tomorrow as boost in the top of second through fifth is non-existent with a stockclutch that has 115k miles.
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VAPORIZER VOLCANO

 

Try bleeding your coolant line

 

What!?