RB25 smoking after coolant flush??!?

[skazat]

Ok so tell me if you guys think i fucked up my motor. I did a coolant flush yesterday. First time while it was cold I drained the radiator and filled it back up. Then I ran it for a bit to get the thermostat to open and flush water through the motor. Right after the thermostat opened and I saw the water in the radiator flowing I shut the car off and drained the radiator while hot and while it was draining I stuck a water hose in the fill neck and just let water flow through the radiator for a bit. After all the water finished draining out I filled it with coolant and let it run for a bit continuously topping it off to get the air out of it.

After filling it with coolant and letting it run for about 5 minutes blue smoke started coming out of the exhaust. :ugh: Now I hadn't really let the car run for an extended period of time before because it still needs to be tuned before I can drive it. Im pretty sure this time was the longest Ive let the motor run.

Since its blue tinted smoke I know its oil that its burning. My first assumption was that my egay turbo might be leaking. But after talking to a friend last night he made me think about something else, the fact that I filled the radiator with cool water from the water hose while the motor was still hot. Maybe something warped or cracked when the cool water hit the motor.

Im gonna pull the turbo off anyways to get the cam cover off and Ill check and see if its leaking then. But I wanted to get some thoughts on this and see what you guys think. Did i fuck up by draining it while hot? Or filling it up with cool water while hot?

[delado]

I honestly don't think it would warp because of a hot/cold mixture. I think the fact that you haven't really ran the motor long enough before is the problem. And an ebay turbo will most likely have fucked seals so oil is probably seeping through and burning.

[Chrischeezer]

Whats the history of this engine?
Was it apart? if so why? what was replaced?..
no way you broke something pouring water into it while bleeding it.
what are you tuning with? what fuel system?

[skazat]

i dont know why i didnt think of it but I know that in some cases if your motors overheating and you think your going to help it by putting cool water in it you can crack your head or block. thats what i was wondering in this case. albeit the motor wasn't over heating it was only at running temp when i shut it off and drained as i filled the motor with tap water from a water hose.

I got the motor from a guy who bought it from an importer. he never got a chance to run it so as far as i know im the first person since its been imported to run it. I pulled the head off to see if there was any thing wrong with the top end. pistons and cylinder bore checked out fine (could still see the cross hatching) I got the head flat milled just in case. I replaced the hg with a cometic mls and sprayed it with some copper gasket sealer stuff in a can to help it seal. put arp head studs and properly torqued everything down.

Im tuning with an aem ems, at the moment all it has is a base map with the sensors calibrated for it (i eliminated the maf and went with a speed density set up). I havent even driven it other than pulling it in a bay or moving it around the yard. fuel system is all stock. all it has is a top mount manifold with egay turbo and front mount ic into a freddy intake. all of which came with the swap, not the way id spend the money but i figured ill go ahead and get it all running and make sure everythings good before spending too much on it.

[mantas]

When i had my Altima (decades ago) i took it in for a car wash and the guy offered to wash the engine bay. Drove 2 miles to my house and the car died right in the driveway. Busted head gasket. I'm pretty sure the hot engine/cool water caused it or caused the problem to show up early.

[skazat]

Yeah I could see that being the case in your situation. But given these circumstances, I really dont think that the water from the water hose could have been SO cold that it fucked up the head.

Im hopefully going to pull the turbo off this week and see if its leaking oil out the exhaust side. I already pulled the intercooler piping off the turbo and its clean.

[SoBay240guy]

how long has the motor run since you put the head back on?

did you look at the valve stem seals?

you would have had to crack the block in a very strange way to burn oil and not get coolant leaking into the cylinders or contaminating the oil.

I'd look more at thing like valve stem seals, or the Ebay Turbo...+1 for checking the exhaust side of turbo for oil leaks...

[skazat]

Theres no quick way of checking for valve stem seals, is there?

[Brok3n_RB25]

Does it smoke only at idle or all the time? Usually valve stem seals will stop smoking when you get the RPM's up. Don't hold me to that, but that's what my experience has shown. Rings will burn oil at all engine speeds, and valve stem seals are usually at idle.

[ShadowMan]

Theres no quick way of checking for valve stem seals, is there?

To look at the seals you're looking thru the valve spring, I'm not sure you would really be able to tell. To really check em I would think you would have to remove the cams and valve seals. Then, you might as well replace em since you're that deep anyway. IMO. I just finished rebuilding my blactop and changed the valve seals. Getting the keepers back in is a real bitch.