v8 t-stat, what else should i check Options

[smrz914]

So i took my t-stat out and put 3 1/8" holes in it. Anything i can/should chech while i'm in there?

[smrz914]

I saw your similar post over on porchev. It's clear here your fighting a cooling issue. What is your temperature at highway speed? How high does it get (max.)?

My gauge shows above 260 and this is taken from the side of the block b/c the relay that turns on my fans is connected the the intake.

What happens at extended idle?

Get's hot

Are you using a expansion tank? Where is it mounted? Does the coolant in expansion tank always come back to same level after car is completely cooled off (over night)? If not, you've got some sort of leak (internal or external) that could lead to high operating temp.

My expantion tank is mounted in the rear trunk. It seems to work properly and levels seem to be normal and consistant.

RH recommends a 16lb. radiator cap.

That's what I got.

Do you know how to burp system?

I hope so, no one ever gave me instructions and i think i have tried most posibilities. I even went as far as widdleing down a peice of hose so it fit's inside the t-stat opening and connected the other end to the bottom of a bucket. Then i ran the car and water worked it's way into the bucket and then a whole bunch of water entered the bucked and then vacated. So the water cycled up and down every 3 or 4 seconds. This is also something i find odd.

Who's water pump are you using? Since you didn't have bleed holes in your thermostat, there is a chance you damaged impeller if rpm exceeded 2-3000 before t/s opened.

Interesting because my first one from Renegade hit the fan (one of the impeller blades came off so I went to my FLAPS and they found me a replacement out of steel and not aluminum. The pump is a suspect being that the shaft that connects the pully and the impeller might be slipping.

Have you checked all hoses to ensure no kinks exist in system?

The hose is either the green stripe hose that renegade recomends or preformed sections to make curves. I can't find any kinks.

I saw pics of radiator on your website. Do you have any others of engine bay and or hose routing?

That's my old radiator and I haven't had a chance to take new ones, But it's a big aluminum radiaor w/ 2 12" fans that put out 1050 cfm each. Hose routing is underneath the car.