engine suddenly smoking BAD - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

dads67 · 04-03-2015, 05:41 PM

well had a bad oil leak from damper so we pulled the orig 55000 mile engine and installed a new oil pump with shaft, screen, oil pan gaskets and damper cover and seal no more leaks drive way dry as a bone.

now all of a sudden she's smoking like a train... im going to try to replace the valve stem seals as im sure there brittle and should have thought of it when we had the engine out but its not a hard fix.

im really really hoping its not the rings, IF SO ill pull it and install a new GM 350 crate motor jegs has for 1570.00 with 3 year 1000,000 mile warranty,

thoughts on what the leak might be? im HOPING ITS FROM THE VALVE STEM SEALS

11vert w&o · 04-04-2015, 03:29 AM

Sounds like increased oil pressure / volume from the new pump might be flooding the top end with more oil than before causing It to suck through the valve seals. That is the only thing I can think of. Good luck, old cars are fun, you never run out of things to do.

11vert w&o · 04-04-2015, 06:52 AM

Also check the oil return holes in the heads, they may be plugged.

dads67 · 04-04-2015, 07:22 AM

will do on both im praying its not the rings, was running perfect after we resealed it, installed new oil pan pump ,,,but that would explain the increase oil psi but the pump was a factory type not high vol or psi, but it was new melling pump, will pull valve covers and install new valve seals anyway as well as check oil return holes and pray it stops

11vert w&o · 04-04-2015, 08:28 AM

It shouldn't be the rings, you didn't do anything that should have an effect on them. I think you will find the problem on the top end.

pcguy2u · 04-04-2015, 09:25 AM

Did the smoke start immediately after starting it up the first time?

dads67 · 04-04-2015, 05:04 PM

no it didn't ran like a top then all of a sudden smoking

pcguy2u · 04-04-2015, 05:13 PM

Quote:

Originally Posted by dads67

no it didn't ran like a top then all of a sudden smoking

Just trying to understand the sequence of events - how many miles/hours or days???

7171tk · 04-04-2015, 05:16 PM

Is oil overfilled

pcguy2u · 04-04-2015, 05:20 PM

Another question assuming the smoke is coming from the exhaust. What color is the smoke?

dads67 · 04-05-2015, 11:35 AM

MAY have a good point on poss overfill. ill drain and check and will also install new valve seal and hope for the best was running great then smoking had to replace dip stick and tube out of spare motor will replace with orig gm tube and stick and hope

dads67 · 04-06-2015, 04:38 PM

bought a valve spring compressor and valve stem seals as well as orig oil tube and dip stick ill bet I over filled it on top of bad dried stem seals stay tuned

ChrisBlair · 04-08-2015, 06:44 PM

Just saw this. I'm an old-car guy. Crankcase pressure might do it too.

Interested to see what you find.

I'd recommend not buying the crate engine actually. I'd recommend that you rebuild your engine. If it's a small block Chevy you can do it easily, and once you're done, you'll know it was done right. Building my own classic car engine was the best thing I ever did for my old car. There was no longer any engine repair I would not tackle on the spot, including removal of the crank for inspection.

dads67 · 04-11-2015, 08:13 AM

decided im installing a new gm 350 4 bolt long block in the 67 to drive with a 3yr 1000,000 mile warranty.... jegs has for 1500 plus free shipping

heck you cant rebuld it for 1500.

ill rebuild the orig 327 at some point and put it back stay tuned

04-03-2015, 05:41 PM	#1
dads67 Drives: 67 camaro Join Date: Dec 2014 Location: texas Posts: 66 View My Garage	engine suddenly smoking BAD well had a bad oil leak from damper so we pulled the orig 55000 mile engine and installed a new oil pump with shaft, screen, oil pan gaskets and damper cover and seal no more leaks drive way dry as a bone. now all of a sudden she's smoking like a train... im going to try to replace the valve stem seals as im sure there brittle and should have thought of it when we had the engine out but its not a hard fix. im really really hoping its not the rings, IF SO ill pull it and install a new GM 350 crate motor jegs has for 1570.00 with 3 year 1000,000 mile warranty, thoughts on what the leak might be? im HOPING ITS FROM THE VALVE STEM SEALS

04-04-2015, 03:29 AM	#2
11vert w&o Drives: 2010 2SS/RS Join Date: Jun 2012 Location: Ohio Posts: 79	Sounds like increased oil pressure / volume from the new pump might be flooding the top end with more oil than before causing It to suck through the valve seals. That is the only thing I can think of. Good luck, old cars are fun, you never run out of things to do. __________________ CAI Intake Night Fury Cam Kooks long tube step headers High flow cats Corsa exhaust 160* Thermostat Lethal racing custom tune

04-04-2015, 06:52 AM	#3
11vert w&o Drives: 2010 2SS/RS Join Date: Jun 2012 Location: Ohio Posts: 79	Also check the oil return holes in the heads, they may be plugged. __________________ CAI Intake Night Fury Cam Kooks long tube step headers High flow cats Corsa exhaust 160* Thermostat Lethal racing custom tune

04-04-2015, 08:28 AM	#5
11vert w&o Drives: 2010 2SS/RS Join Date: Jun 2012 Location: Ohio Posts: 79	It shouldn't be the rings, you didn't do anything that should have an effect on them. I think you will find the problem on the top end. __________________ CAI Intake Night Fury Cam Kooks long tube step headers High flow cats Corsa exhaust 160* Thermostat Lethal racing custom tune

04-08-2015, 06:44 PM	#13
ChrisBlair Buick 455 Fan Drives: 1970 Buick, 2012 1SS LS3 Join Date: Jun 2010 Location: Boston MA Posts: 5,957	Just saw this. I'm an old-car guy. Crankcase pressure might do it too. Interested to see what you find. I'd recommend not buying the crate engine actually. I'd recommend that you rebuild your engine. If it's a small block Chevy you can do it easily, and once you're done, you'll know it was done right. Building my own classic car engine was the best thing I ever did for my old car. There was no longer any engine repair I would not tackle on the spot, including removal of the crank for inspection. __________________

04-04-2015, 07:22 AM	#4
dads67 Drives: 67 camaro Join Date: Dec 2014 Location: texas Posts: 66 View My Garage	will do on both im praying its not the rings, was running perfect after we resealed it, installed new oil pan pump ,,,but that would explain the increase oil psi but the pump was a factory type not high vol or psi, but it was new melling pump, will pull valve covers and install new valve seals anyway as well as check oil return holes and pray it stops

04-04-2015, 09:25 AM	#6
pcguy2u Drives: 2009 Corvette ZR1 Join Date: Aug 2012 Location: On the coast North of SFBay Posts: 297	Did the smoke start immediately after starting it up the first time?

04-04-2015, 05:04 PM	#7
dads67 Drives: 67 camaro Join Date: Dec 2014 Location: texas Posts: 66 View My Garage	no it didn't ran like a top then all of a sudden smoking

04-04-2015, 05:16 PM	#9
7171tk Drives: 2017 1SS I LE Join Date: Jan 2015 Location: AZ Posts: 15	Is oil overfilled

04-04-2015, 05:20 PM	#10
pcguy2u Drives: 2009 Corvette ZR1 Join Date: Aug 2012 Location: On the coast North of SFBay Posts: 297	Another question assuming the smoke is coming from the exhaust. What color is the smoke?

04-05-2015, 11:35 AM	#11
dads67 Drives: 67 camaro Join Date: Dec 2014 Location: texas Posts: 66 View My Garage	MAY have a good point on poss overfill. ill drain and check and will also install new valve seal and hope for the best was running great then smoking had to replace dip stick and tube out of spare motor will replace with orig gm tube and stick and hope

04-06-2015, 04:38 PM	#12
dads67 Drives: 67 camaro Join Date: Dec 2014 Location: texas Posts: 66 View My Garage	bought a valve spring compressor and valve stem seals as well as orig oil tube and dip stick ill bet I over filled it on top of bad dried stem seals stay tuned

04-11-2015, 08:13 AM	#14
dads67 Drives: 67 camaro Join Date: Dec 2014 Location: texas Posts: 66 View My Garage	new gm longblock decided im installing a new gm 350 4 bolt long block in the 67 to drive with a 3yr 1000,000 mile warranty.... jegs has for 1500 plus free shipping heck you cant rebuld it for 1500. ill rebuild the orig 327 at some point and put it back stay tuned