So... My coolant is mixing with the oil

[USMCFieldMP]

LNF's and LSJ's have the same sleeves... improvements to the block itself is what makes the LNF's technically rated higher.

[mrbelvedere]

a problem i have found is if the head and block has been milled the head locating dowls can bottom out holding the head off of block not allowing the headgasket to be properly compressed

[RooTBeeR]

a problem i have found is if the head and block has been milled the head locating dowls can bottom out holding the head off of block not allowing the headgasket to be properly compressed

time to bring out the grinder!

[mrbelvedere]

a flat file would be a better choice

[USMCFieldMP]

What's the fun in a flat file though?

[RooTBeeR]

What's the fun in a flat file though?

POWER TOOLS!




:grunt grunt:

[qwikredline]

a problem i have found is if the head and block has been milled the head locating dowls can bottom out holding the head off of block not allowing the headgasket to be properly compressed

good tip ! Also sounds like compression would be creeping upwards....

[mrbelvedere]

not always a bad thing

[VeNoM0713]

No mixing with stock head back on. Car is running fine. Tough to say if it was heads fault or other reasons.

i know this is old but i still have the issue even though i put the old head back on. it is eating the coolant up slower but i think thats because i sprayed the ♠♠♠♠ out of the new hg with copper spray. i dont know if my block is warped from the sleeves or whatever but there is definately something wrong with my block. it kinda sucks spending all that money for something that doesnt work properly.if it was like 500 bucks or something then oh well, i would eat it but this costed me at least 6-7 thousand dollars when everything was said and done. im not happy, lets just put it this way.

[qwikredline]

sympathy for sure/i prefer stock block replacements. sad to say

[ac66bronco]

You ever see what it does to the engine? Subaru's it really screws up. Perch why not to use stop leak in a Subaru on google. We had that happen to a local guys motor I tore down over the weekend. Its packed with that crap.

Agreed. That stuff is a temporary fix to a permanant problem

You both best sell your GM cars.

IIRC and I'm like 99.99999% sure on this. Every GM motor comes off the line with thoes tabs in them.

[mrbelvedere]

i think found my coolant loss problem i think it was the factory oil cooler but i dont see using copper spreay as a problem

[USMCFieldMP]

i think found my coolant loss problem i think it was the factory oil cooler but i dont see using copper spreay as a problem

This is where I would look, as well. I'll more than likely be using an LNF Oil Cooler when my engine goes back together, so hopefully I can avoid this problem, as I've seen it happen quite a bit to people reassembling LSJ's.

[qwikredline]

This is where I would look, as well. I'll more than likely be using an LNF Oil Cooler when my engine goes back together, so hopefully I can avoid this problem, as I've seen it happen quite a bit to people reassembling LSJ's.

same. dont worry dont overtorque the bolts low torque. 18 ft lbs iirc

[USMCFieldMP]

same. dont worry dont overtorque the bolts low torque. 18 ft lbs iirc

The only disadvantage for me switching to the LNF Cooler is that I had my Oil Pressure Gauge in the LSJ Cooler's front port. Not a big deal though... I'll find a new spot to screw it in.

[VeNoM0713]

This is where I would look, as well. I'll more than likely be using an LNF Oil Cooler when my engine goes back together, so hopefully I can avoid this problem, as I've seen it happen quite a bit to people reassembling LSJ's.

The only thing that confuses me is, say it was my oil cooler.. would it have anything to do with sucking even more coolant if i threw on a new stock hg with no copper spray on it? when i did my head swap back to stock, ray bates suggested that i dont use copper spray on the hg etc.. so i didnt. after we were done, i was literally filling up my resevoir every other day. and then after we tore it down again, i sprayed the ♠♠♠♠ out of another new stock hg which brings me to where i am now. i no longer have a milky colored oil cap and i am topping it off every other week instead of every other day. my oil dipstick looks like a chocolate milk shake though unfortunately. i just dont understand how that could be the oil cooler.

[USMCFieldMP]

Well, maybe you fixed the HG leak... but still have an Oil Cooler leak.

[qwikredline]

blocl i would guess bad sleeve install ugh sorry jusy an opinion

[USMCFieldMP]

You were given good suggestions before... have you tried them?

If your gonna put it back together you can test it like we tested the LNF's. Get some tracer dye (GM dealer should have it), throw it in the coolant and run the car to mix it in. Then yank the oil pan, pressurize the cooling system, grab a and dye light and look up.

Being aluminum it could be porosity, casting shift, casting cracks, damage from removing/installing sleeves. Theres a lot it could be. You said you only saw the oil mix in the head, not in the pan? The HHR's had a milkshake in the oil pan from the bad sleeve. You may have head porosity or crack. Or you caught it before it really mixed with the oil. The tracer dye should make spotting stuff like that fairly simple. Tedious but simple

a problem i have found is if the head and block has been milled the head locating dowls can bottom out holding the head off of block not allowing the headgasket to be properly compressed

a flat file would be a better choice

Also, when you put the block back together and copper sprayed the HG... was that a new HG, or were you reusing the previous one? I would still test/change the Oil Cooler, as well. Quite a few people have had the problem there. Your big leak might have been at the head, but you may also have a small leak in the oil cooler, which might be why you are still getting coolant in the oil.

[mrbelvedere]

This is where I would look, as well. I'll more than likely be using an LNF Oil Cooler when my engine goes back together, so hopefully I can avoid this problem, as I've seen it happen quite a bit to people reassembling LSJ's.

go stand alone on the cooler its easier to do and much more effective and you can use your stock oil cooler mounting bracket