smoke problems

[nc90awd]

I just put my head back on the car after I got it decked with arp head studs and mitsubishi metal head gasket and used copper spray on the head gasket. I let the car idle for like 20 min and when I drove the car it ran great and every thing was perfect. After driving around for a while I boosted to 5k and it pulled better than ever with the newer 14b. I did a few more pulls and then it started running like crap and has lots of smoke coming from the breather hose and under the oil cap. I like a dumb ass did not re torque my head studs and raced my engine and I think the head gasket lost its seal. However there is no water in the oil and the temp still is where its supposed to be. Before I pulled the head I had 140 compression across. Whats going on. Is my HG not sealed?

 

[ddavisaf]

If your compression is good then I would check the turbo seals.
Pull off your LICP and see how much oil is pooled up. Then post back.

 

[DSMcrazy3]

Why would you race a newly built engine?

 

[nc90awd]

The compression test I did was before I put the metal head gasket, I haven't done one after this problem because my compression tester needs the rubber o-ring. There is a lot of oil in my IC but its coming from the breather hose that goes to my intake from the valve cover. Lots of smoke and some oil are coming from that hose.

 

[nc90awd]

Why would you race a newly built engine?

I let my ADD kick in

 

[nc90awd]

I re torqued the head studs to 100 ft lbs and replaced the pcv valve. Its still running like crap and smoking out the breather. I will do a compression test in the morning and if compression is good i'll replace the plugs cause they are probably fouled from the oil in the intake.

 

[ddavisaf]

That breather hose should not be dumping oil in mass quantities into your intake. If it is your PCV is probably bad. Pull off your downpipe and check for oil coming from the O2 housing.

 

[nc90awd]

I replaced the pcv valve last night and the one I took off was still good. There is no oil coming from the turbo because I just put it on when I did the hg. I did a compression test and got 120-0-120-120. The cylinder with zero psi is full of oil. WTF?

 

[TUI2I30]

Because of the smoke from the breater and oilcap I don't think it is the turbo, but that doesn't mean you should rule it out. Check the LICP. I agree with ddavisaf as well, check the intake and turbo inlet for oil if you are recirulating, and replace the PCV valve. Do your compression and leakdown tests.

 

[nc90awd]

I think I got a bent valve because zero compression is either a bent or broken valve or a hole in the piston. If the rings were bad it would still show some compression, and the piston looks good, I got it at BDC and shined a light through the spark plug hole and could see it pretty good and I also straightened a coat hanger and put tape around the point and felt on the piston and it seemed fine. Could a bent valve cause all that blow-by? There is lots of smoke coming from the valve cover/crank case. I think if the valve is bent it maybe from the revised lifters, one getting stuck or something. Any suggestions?

 

[95 'clipse RS]

are you sure your valves are seating fully, did you check them when you had it off the first time? if one or more of them got damaged on uninstallation or installation and are not seating fully then that would cause low compression easy, and if not seating fully then the valves are open a little bit creating a quick passage for the hot exhuast to burn up your valve seals causing the oil leaking in and/or the valves cocking sideways a bit to not close fully leaving you with no compression.

did you have all the pistons in the middle of their travel when installing the head, or did you leave them ATDC and put the head on and turn the cams to get alignment correct? if the second one, that can cause one or more valves to bend. but if you had them in the middle of travel and aligned the cams then turned the crank to TDC then you should be good with the valves.

it could also still be the head gasket too, letting compression into passages forcing them out the oil breather and pcv valve.

but unfortunately the only way to know for sure of what exactly is going on is to tear it back down again and find out if your all good with valve seats, seals, head gasket and the combustion chamber walls (not scratched or scarred).

hope this helps, peace

 

[nc90awd]

I am sure the valve wasn't bent before because the car ran great when the HG was blown it would just run hot after a few minutes and had coolant in the oil. also the car ran good with perfect temp after I put the metal head gasket and new lifters and it still has good temp. It lost compression in that cylinder after I drove the car for a while when it started smoking. I will have the head off tomorrow and know for sure. If my valve got bent would that burn my valve stem seal and cause the crankcase smoke?

 

[nc90awd]

95 clipse, I think your right about the bent valve and burnt valve stem seal, I am thinking thats my problem. I hope at least, because I would rather have to replace a valve and valve stem seal than dealing with trying to get a MLS to seal or cracked piston. I guess I have to wait till I pull the head tomorrow.

 

[95 'clipse RS]

i really dont think you bent the valve unless you got timing off far... did you? but if they were, the seals can be burned, and the valves can become so hot they become cherry red and bend just opening and closing if out of timing.

is the smoke coming from right under the head? further up or down? to sum up the oil everywhere like the breather and pcv valve, thats is usually because the water pump, oil pump and a possilble compression leak into an oil or coolant galley (due to a bad head gasket) are creating so much pressure in the top of your head that all oil thats pumped up there is getting pressurized out the easiest passage it can. which is the breather and pcv. and the dead cylinder thats filled with oil is an example of bad head gasket, bad valves and seals, bad piston rings, and a cracked cylinder wall...

and if the valve got bent, the cylinder would not fire at all. so no smoke from oil would be produced from that cylinder dead cylinder. you have to look at the others that are firing for the smoke being produced. its probably coming out of the head gasket area.

 

[nc90awd]

My timing was dead on when I started the car and checked it again before I put the crank pulley on so I could see all the timing marks, unless it jumped timing after I had been driving it. but I doubt it because I replaced all the timing components including a OEM hydraulic tensioner. I don't think a headgasket problem would give me zero psi. Maybe I have a Bent valve and my Hg is not sealing

 

[95 'clipse RS]

its completly zero? i dont see how you could get a bent valve with perfect timing...

i guess your just gonna have to pull that head and see what went on in there...

good luck

 

[nc90awd]

My engine is ####ed. I pulled the head and my piston looks like its oval. I can see the ring on less than half of the the piston toward the front of the car. There is also a scratch in my cylinder. My wastegate hose t fitting was cracked and fell apart. My turbo must have kept boosting and my motor leaned out. I am pissed now I got to rebuild my engine. Time to go forged.