Fresh motor smoking?

[BLOWN95GT]

Well the 357w motor I built for the turbo project is now smoking. It all started last weekend. I just got 200 miles on the fresh motor and cleaned the car up. I decided to change the oil before me, my wife, and 3 year old leech loaded up and headed to a car show. Before the oil change the car ran great no smoke, no problems what so ever. When wel left the neighborhood I looked in the rear view and there was a trail of smoke like the motor was blown up. I stopped checked to make sure there was no oil leaking on the ground or under the hood and nothing. The smoking stopped after a few miles like it never happened. Well after the car show the same thing leaving the parking lot and you want to talk about embarrasing! So I get home and decide it has to be the turbo drain line but look and there are no problems, it drains the same way it did before. I pull all the plugs and find all are fine except number 4 It is covered in oil. I decide it may be a leaking intake gasket so I change it and still the same results. I looked in the intake port on the head and you can see oil around the intake valve on the number 4 cylinder. So I change the valve stem seats and that doesn't fix it eighther. I did a compression test yesterday and all of the cylinders are showing 155 psi. Now I guess I am going to remove the intake again :banghead: and pull the motor, then drop the oil pan and look to see if I have a oil ring broke on the number 4 cylinder, and take the head to he machine shop to get the valve guides checked again.

[BLOWN95GT]

Here is a pic of what I saw when I pulled the intake the last time. The antifreeze is from removing the lower intake.
http://i597.photobucket.com/albums/tt55/blown95gt/8244c2a4.jpg

[EHardy1971]

I know you said you changed the valve stem seals, but that's what it sounds like to me. :think:

[SvoBrown]

Nothing will smoke as bad as mine did at Lee's house the day I went over there. I feel the pain.

[CrimsonRacing]

Nothing will smoke as bad as mine did at Lee's house the day I went over there. I feel the pain.


That must have been some badass smoking then.........When we test drove the '94 after first engine swap,you would have thought the car was on fire with the amount of smoke trailing it.......Lee and I looked at each other like WTF!!!!!





:metal:

[QWKSNKE]

If it is smoking just on initital startup, then there has to be oil leaking down into that cylinder while car sitting.

Yeah Richard, Kerry's car was pretty bad. It was blowing coolant smoke everywhere

[banditmwp]

If it is smoking just on initital startup, then there has to be oil leaking down into that cylinder while car sitting.

Yeah Richard, Kerry's car was pretty bad. It was blowing coolant smoke everywhere

Yours wasn't exactly smog free at FFW after the 306 build...:poke:

[TheJeanyus]

I know you said you changed the valve stem seals, but that's what it sounds like to me. :think:
:werd: My old Thunderbird did the same thing. But the whole car was worth less than the cost/time to fix it. :D

[coupe]

I had a warped head and bad turbo on my first SVO... smoked like the space-shuttle on launch so I too feel your pain. Hard to believe a ring could have broken. Check the turbo turbine housing for "wetness" from oil...just to eliminate that being a source.

[93cobra1928]

Do a leakdown test on #4 you may have a bad seal or guide

[QWKSNKE]

Yours wasn't exactly smog free at FFW after the 306 build...:poke:

yep and I will NEVER use Cometic head gaskets on AFR heads again :notnice:

But it wasn't near as bad as Kerry's SVO. You could not see his car by the time he drove to my trailer :rofl:

[BLOWN95GT]

If it is smoking just on initital startup, then there has to be oil leaking down into that cylinder while car sitting.

Yeah Richard, Kerry's car was pretty bad. It was blowing coolant smoke everywhere
The car doesn't smoke at all while at idle, but when you rev it up it smokes like im doing a pro mod burn out.

[BLOWN95GT]

I had a warped head and bad turbo on my first SVO... smoked like the space-shuttle on launch so I too feel your pain. Hard to believe a ring could have broken. Check the turbo turbine housing for "wetness" from oil...just to eliminate that being a source.
My head wasn't warped I had them checked before I put them on the motor I also had a brand new trick flow valve spring upgrade kit put on with new retainers, stem seats, and springs. The turbine housing is fine no oil leaking at all.

[BLOWN95GT]

Do a leakdown test on #4 you may have a bad seal or guide
I don't have a leak down tester. And the parts store doesn't have one that I can rent.

[QWKSNKE]

The car doesn't smoke at all while at idle, but when you rev it up it smokes like im doing a pro mod burn out.

what size is the oil drain line and coupling in the oil pan? Are you seeing any blow-by type smoke in the engine bay?

If the smoke is going away during driving, seems like to me it couldn't be a oil ring. Have you double checked your valve adjustment on that cylinder?

[EHardy1971]

Ok, I've got a couple of questions. When you put the new seals on, did you use the little plastic sleeve deal over the tip of the valve to keep from nicking the seal? And what kind of valve stem seals are you running?

[BLOWN95GT]

what size is the oil drain line and coupling in the oil pan? Are you seeing any blow-by type smoke in the engine bay?

If the smoke is going away during driving, seems like to me it couldn't be a oil ring. Have you double checked your valve adjustment on that cylinder?
Oil drain feed line is -4 and oil drain line is -10, no smoke in the engine bay, yes I have checked the valve adjustment a couple of times it is fine.

[BLOWN95GT]

Ok, I've got a couple of questions. When you put the new seals on, did you use the little plastic sleeve deal over the tip of the valve to keep from nicking the seal? And what kind of valve stem seals are you running?
The seals that I pulled off the heads were the brand new seals that came in the trickflow kit i think they were the viton seals, the new seals I put on were teflon from birmingham piston, and what plastic sleeve deal are you talking about?

[EHardy1971]

The seals that I pulled off the heads were the brand new seals that came in the trickflow kit i think they were the viton seals, the new seals I put on were teflon from birmingham piston, and what plastic sleeve deal are you talking about?
I've never had good luck with the teflon seals, the viton ones are the way to go. The sleeve I was referring to slides over the tip of the valve (it's open on one end only) and covers the valve lock grooves, and keeps the seal from getting cut/nicked on the edges of the grooves. It only takes a small slice on a seal to create a leak. If you don't have that sleeve, you can use some scotch tape. I know the Fel-Pro seal kits come with the sleeve. Also be sure to put some oil on the contact area of the seal where it slides on the valve stem before you put it on. :nice:

[BLOWN95GT]

I've never had good luck with the teflon seals, the viton ones are the way to go. The sleeve I was referring to slides over the tip of the valve (it's open on one end only) and covers the valve lock grooves, and keeps the seal from getting cut/nicked on the edges of the grooves. It only takes a small slice on a seal to create a leak. If you don't have that sleeve, you can use some scotch tape. I know the Fel-Pro seal kits come with the sleeve. Also be sure to put some oil on the contact area of the seal where it slides on the valve stem before you put it on. :nice:

I didn't have the sleeve you are talking about but I did very carefully push the seals on by hand until I got them to the bottom of the stem. I pulled the intake back off and I'm going to have it hauled back to my shop in pell city some time soon when it's not storming so I can put it on the lift and pull the motor.

[EHardy1971]

I didn't have the sleeve you are talking about but I did very carefully push the seals on by hand until I got them to the bottom of the stem. I pulled the intake back off and I'm going to have it hauled back to my shop in pell city some time soon when it's not storming so I can put it on the lift and pull the motor.
Yeah, if you're talking about the TrickFlow valve spring kit, mine didn't come with the sleeve either, I had a couple in my tool box I had kept from previous kits/builds. Even if you slide those on super careful without something like that over the valve lock grooves, you can still mess up the seal. The edges on those grooves are razor sharp and it only takes the slightest contact to cut it.