ok so the last couple times i drove my car at the track after a run the car would start to run hot so first i thought just because i was on the car full blast all the way down the track then i noticed my Down pipe is pretty much touching my rad. so i'm getting that coated and wrapped but i took my car on the street for a ride and i drove it for like 10 min and it was fine occasionally getting on it but once i did a 3rd gear pull at higher boost i noticed instantly the temp gauge starting going up a lil past normal and went up to 3/4 and then stood there so i brought it back to the garage and took it out later that day and same thing but i noticed my upper rad hose was collapsed like it was all sucked in so i was thinking that mabey under high boost my head was lifting but i dunno i'm kinda stumped i ask the guy who built my motor what he torqued the head to and he said 80FT/lbs has any one had a similar prob????


heres the setup:

85mm dart sleeved block
golden eagle head gasket with ARP studs
ported ITR head
fluidyne rad. with slim fan
FMIC that kinda blocks the rad

 

Since this is on the topic, why does coolant back up to the reserve tank? This happens to me when going down the 1320 but it never backs up so much to the point it spills over..????? Insight?

 

got o rings ?

 

You guys have headgasket issues. Try changing the headgasket and having the car's retuned.

 

I'm running stock sleeves right now...

 

Run a leak down test..

Basic questions..

Coolant system properly bleed ?
Good radiator Cap ?
Fan blowing or pulling the right way ? Is it even turning on ?
Is the oil cap milky ? or better yet ? does the oil look like a milkshake ?

 

i bleed the coolant forever

the rad cap is new
fan is wired to be on with the key on and is blowing the right way

oil is perfect so is the rad cap

 

Do a leakdown test with the radiator cap off, if you see bubbles and get the coolant jackets pressurizing you either have a blown headgasket or dropped sleeve.

The timing is not aggressive at all, there is probably 5-6 mph left in timing/fuel track tuning at the boost level you are currently running it at.

Usually with a dropped sleeve or blown headgasket you'll get the overflow pushing a ton of coolant into the engine bay. With the radiator hose collapsing, the coolant is going somewhere.

 

its not losing coolant tho i'll do a leak down test and see what happens