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post #1 of 8 (permalink) Old 10-20-2007, 10:11 PM Thread Starter
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SC smokin?

I bought a SC the other day(91 auto) and it smokes. The car had a bad vac leak but I took care of it now it smkin pretty good. The previous owner changed the head gaskets but I don't know how well of a job he did on them, any way to tell? The smoke is whiteish and smells like burnt gas... go figure but its to the point where I really don't want to drive it as it is excessive. Any way to track down what the cause of the smoke is? There is a valve cover gasket seal leak thats leaking oil on the header but its not too bad. I will take a pic of the smoke and get some of the pics of the car up tomorrow. Its really not that bad. It will make a good complement to my 96 sport. Not a bad find for $500 if I say so myself. I am getting a set of Cobra R's with it also.

1996 sport 4.6 130k and still strong.
1991 SC 3.8 project and toy.
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post #2 of 8 (permalink) Old 10-20-2007, 11:45 PM
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If he just recently changed the gaskets and hasn't really driven the car there could still be coolant in the mufflers.

If it's not over heating I would let it warm up to normal temp and then take it for a ride, (about a mile or 2) to clear out any coolant trapped in the exhaust system.

I've come into this world with nothing and still manage to have some of it left.

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It's not what I know, It's knowing what I don't know.

1994 Thunderbird, 4.6 V8, PI heads, SVO Blower, 8# pulley, 2.5 duel exhaust, 4R70W, MarkVIII converter, Mark VIII differential, Trac-Loc, 3.73 gears, H&R 1.5 lowering springs, bilstien rear shocks and SC front struts.
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post #3 of 8 (permalink) Old 10-21-2007, 09:45 AM Thread Starter
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Already took it for about 30 miles of driving and its still smoking plus the rad fan doesn't ever come on.

1996 sport 4.6 130k and still strong.
1991 SC 3.8 project and toy.
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post #4 of 8 (permalink) Old 11-03-2007, 05:08 PM
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smokin

did u check all the coolant lines ,clips.? hows does the gauge read.normal? check ya oil and see if any coolant has mixed with oil. if ur fan isn't comming on after 30mins of running .ur icrm is bad. all the coolant should be out of the exhaust by now.if the job was done rite. check with the previous owener to see if he changed both sides .and was the h/g dome rite,, meaning............checking heads for crack,warpage,etc. if all was done rite, with new headbolts felpro gaskets all hoses were replaced t-stat. u will have to check urself and go through the motor .some thing is lose or wasn't done.
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post #5 of 8 (permalink) Old 12-05-2007, 09:14 PM
 
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just wire a switch to your dash and run the fan on high all the time and another i would change the o2 sensors since the head gaskets went thay are probly no good and for the cats not really sure but i would also check the oil to make sure he flushed all the water out if not then pray hard to god that it didnt mess up the engine........

I replace the heads in my 92 when they blew a head gasket and i went through 30 qaurts of oil for get all the water out of the engine
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post #6 of 8 (permalink) Old 12-12-2007, 02:29 PM
 
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Originally Posted by Destructor90 View Post
just wire a switch to your dash and run the fan on high all the time and another i would change the o2 sensors since the head gaskets went thay are probly no good and for the cats not really sure but i would also check the oil to make sure he flushed all the water out if not then pray hard to god that it didnt mess up the engine........

I replace the heads in my 92 when they blew a head gasket and i went through 30 qaurts of oil for get all the water out of the engine
30 Quarts? Wow, that had to be expensive...

My SC smelled like gas really bad right after I got it, and it hasnt at all since...I almost forgot about that part...huh
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post #7 of 8 (permalink) Old 12-13-2007, 09:18 AM Thread Starter
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Ok so I have the heads off... PITA. They were warped .002 so I got them machined and they are good... Now comes the other question. What are some while I am in there things that I can do? The trans is having inital engagement problems so I am thinking of rebuilding it to Jerry Spec if a filter change dosen't help. How is the timing chain after about 100k? The cylender walls are still clean and I can see the hone marks on them still which leads me to believe that this engine was rebuilt before... But yeah I don't want to have to mess with the engine again and plan to run it hard so any ideas?

1996 sport 4.6 130k and still strong.
1991 SC 3.8 project and toy.
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post #8 of 8 (permalink) Old 12-13-2007, 12:20 PM
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Quote:
Originally Posted by ncoop23 View Post
Ok so I have the heads off... PITA. They were warped .002 so I got them machined and they are good... Now comes the other question. What are some while I am in there things that I can do? The trans is having inital engagement problems so I am thinking of rebuilding it to Jerry Spec if a filter change dosen't help. How is the timing chain after about 100k? The cylender walls are still clean and I can see the hone marks on them still which leads me to believe that this engine was rebuilt before... But yeah I don't want to have to mess with the engine again and plan to run it hard so any ideas?
I would suggest changing the timing chain, chain tensioner, and water-pump since you have it all apart.

Fuel injected engines don't have to worry about oil wash down like carburetted engines (as long as there maintained), so they will last much longer. I pulled the heads off of my V6 with 150,000 on it and it still had a crosshatch and there was no ridge.

I wouldn't even think twice about putting that engine in another car and going another 100K ( if it had 2 more cylinders).

I've come into this world with nothing and still manage to have some of it left.

ASE Master Technician and Advanced Level Specialist.
It's not what I know, It's knowing what I don't know.

1994 Thunderbird, 4.6 V8, PI heads, SVO Blower, 8# pulley, 2.5 duel exhaust, 4R70W, MarkVIII converter, Mark VIII differential, Trac-Loc, 3.73 gears, H&R 1.5 lowering springs, bilstien rear shocks and SC front struts.
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