Ronny_02_WS6

iTrader: (6)

So I just putted the heads back on the car after valvespring and lifter change LT/ ORY, (for very soon cam), AIR removed, and when I started the car, antifreeze is leaking down from the back drivers side head runs all the way trough the bottom of the Transmission, it was mixing oil with coolant as well, I took the driver's side head off and cleaned it it and installed it again with new bolt and gaskets and started it up again and the same thing happened, What can This be, is frustrating doing extra work for same result???

KCS

iTrader: (20)

Steam tube posts?

Ronny_02_WS6

iTrader: (6)

Would that make the coolant mixed with oil???

NY02ws6

Nope, but head gasket, cracked head or cracked block would...did you torque the head bolts correctly? Did you check the heads for warpage? Did you clean ALL of the coolant out of the head bolt holes in the block?

Ronny_02_WS6

iTrader: (6)

Well, gaskets are new, I ensured that the bolt holes where 100% dry, I spent a bunch of paper towels and blew air also, the head looked clean but not sure about warpage though.

3rdCoastPowerSports

iTrader: (5)

coolant crossover tube or block off plate. if you R&R'd it recently. did you install a new coolant crossover tube gasket? did you torque the bolt down to 106 in/lbs?

NY02ws6

Are you sure you torqued everything correctly? If the same head leaked twice I would definitely have checked it and the deck for flatness before reassembly the second time. All you need is a straight-edge and a feeler gauge.

Crossovers won't put coolant in the oil.

3rdCoastPowerSports

iTrader: (5)

i guess i didn't read close enough. i did not see that he had coolant in oil. i thought he just had coolant coming from the coolant block off cap.

NY02ws6

Yea if it was just a leak I would have said the same thing. Leak plus coolant in oil...to me that is either head gasket or the back of the block is cracked. I would lean towards gasket not sealing, maybe warped head?

3rdCoastPowerSports

iTrader: (5)

run a leak down test but i agree, block or head gasket... hope its a head gasket

Ronny_02_WS6

iTrader: (6)

Thanks for the responses, I will have the car lifted, I will run a test and check with a mirror or something to see where it comes from, Im sure is not the gasket because i did it twice with new gaskets, but if it's the head maybe that would be the excuse to get aftermarket ones, if it's the block I don't wanna know. I have my fingers crossed.

Ronny_02_WS6

iTrader: (6)

Problem fixed!!!, it was the Coolant bolt of the back of the head towards the intake, it was loose, like the coolant crossover but the back, the pressure test save my life!!!! I was super scared, now I'm back on the road

NY02ws6

Good to hear, so how was coolant getting in the oil?

Ronny_02_WS6

iTrader: (6)

Well the first time it was the gasket and then I took the head off and cleaned the old gasket material with acetone, and it sealed good, then I putted back but that coolant bolt was loose, I changed the oil, did the pressure check and checked the oil and no mix , I tighted the bolt and no more leak and the pressure stayed the same (no psi loss) so lesson learned, pressure test before anything.

burntblues

What and where is the coolant bolt?

Ronny_02_WS6

iTrader: (6)

The one on the back of the head, the bolt was loose, the coolant seal where this goes: http://texas-speed.com/p-2268-gm-ls1-coolant-seal.aspx