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09-20-2006, 07:37 PM
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CC Member
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Join Date: Feb 2006
Cobra Make, Engine:
Posts: 40
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Blue smoke
My car has just started smokeing on the right side on start up when its been warmed up. It appears to only do this only on start up for a second or so.and a couple of times today when I was at idle at a light and took off I noticed a cloud of blue smoke behind me !!!!! I thought this can,t be me ! Must be the guy in the beater vega . But in fact it was. I don,t beat the car at all,it seems to run fine.I,m thinking valve guide ?? when started cold no smoke, also yesterday I was parked for 1/2 hour on a slight grade rear end up.when I started the car this was the first time I noticed smoke ( A large cloud ).Eng. 428 Fe with elder. heads.Question :what should I check 1st etc.
thanx for all your advise in advance !
Mike
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09-20-2006, 07:51 PM
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CC Member
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Join Date: Jul 2004
Location: Alpharetta,
GA
Cobra Make, Engine: ERA #414 427 s/o w. Shelby Aluminum heads, Edelbrock Performer RPM Intake, Mighty Demon 750, Tremec TKO 600
Posts: 714
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Pull the plugs and see how they look? If oily, might be an intake gasket leak, sucking oil into the cylinders? Do a leak down test to see if the rings are sealing ok? |
09-20-2006, 08:18 PM
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Blue Smoke
Thanx I'll do the plugs 1st.How do I do a leak down test?
Mike
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09-20-2006, 08:18 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
ca
Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
Posts: 1,435
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Or too much oil to the valve covers!
__________________
Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong. 
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09-20-2006, 08:31 PM
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CC Member
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Join Date: Jul 2004
Location: Alpharetta,
GA
Cobra Make, Engine: ERA #414 427 s/o w. Shelby Aluminum heads, Edelbrock Performer RPM Intake, Mighty Demon 750, Tremec TKO 600
Posts: 714
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Leak down test requires a leak down gizmo and a compressor. Basically you get a leak down tester, which has 2 pressure gauges on it and one end hooks to your compressor, and the other end to a hose with a fitting to screw into the spark plug hole. It fills your cylinder with compressed air and then measures how fast it leaks out of the cylinder. No cylinder rings seal perfectly, so it will give you a percentage reading on one of the gauges - mine has green, yellow and red zones to let you know if the rate is ok, or potential trouble. If the cylinder is not passing the test, it usually indicates the air is leaking past your rings - which indicates opportunity for oil to get past them and into the combustion chamber. If you have a leaky gasket, or leaky valves, you might hear air escaping from the carb, or see bubbles in your water tank. You can find leak down testers for sale at Summit, or most parts stores will have them. If you have a friendly mechanic, they could do it as well. You'll have to decide which is more cost efficient - testers are maybe in the $100 range.
One other sign that pressure is going by the rings is that you'll likely get more blow by out of your breathers, or even out the dip stick, so check as see if the engine is oily in those areas too.
You can probably check a lot of symptoms before having to leap to the leak down test. Outside the blue smoke, spark plugs should be the initial indicator that you've got oil in the combustion chamber. Then you have to figure out how it's getting there.
Also, keep track of your oil level to see if it's losing any significant amount and just look around the block and under the car for any puddles.
You can do a web search on leak down test and find all sorts of articles explaining a lot more than I've said here.
Good luck!
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09-20-2006, 08:56 PM
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Just Noticed something !! My dip stick reads full ot 1 qt low depending on which way I put it in !!!! what direction should the print on the stick be faceing ? towards the block orthe car ??
Mike
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09-20-2006, 09:03 PM
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CC Member
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Join Date: Aug 2000
Location: Australia Geelong,
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Cobra Make, Engine: Real: Southern Roadcraft, SRV8, 351W stroker
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Smoke at idle that goes away after acceleration could indicate leaking valve stem seals.
Cheers,
Bryan
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COB-66 Young at heart old fart.
Don't drive faster than your guardian angel can fly.
If it doesn't matter what gear your in you have enough torque.
VK3KDN
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09-20-2006, 09:04 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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Quote:
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Originally Posted by low ufo
Just Noticed something !! My dip stick reads full ot 1 qt low depending on which way I put it in !!!! what direction should the print on the stick be faceing ? towards the block orthe car ??
Mike
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It should not matter
__________________
Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
Last edited by Ibr8k4vetts; 09-20-2006 at 09:08 PM..
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09-20-2006, 09:06 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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Do you have a H/V oil pump?
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Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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09-20-2006, 09:12 PM
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Got me thinkin to much oil in the eng. and maybe the wrong dip stick. It Is 1 qt. difference depending how I put it in and this just started doing this when I topped the oil off to max on the stick any comments ? |
09-20-2006, 09:13 PM
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I don't know if i have a H/V pump .I didn't build the engine. How can I tell if i have one ?
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09-20-2006, 09:18 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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If it is a older used motor that just started to smoke, it is valve guides. If it a new motor it could be too much oil to the top end!
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Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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09-20-2006, 09:20 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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Quote:
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Originally Posted by low ufo
I don't know if i have a H/V pump .I didn't build the engine. How can I tell if i have one ?
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Drop the oil pan and look at the pump
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Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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09-20-2006, 09:23 PM
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@ 10k on the motor seems kind of early to be worn out but ??? I will investigate further
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09-20-2006, 09:25 PM
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Also if it were guides wouldn't do it all the time?
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09-20-2006, 09:25 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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Ok, I will go with a intake gasket!
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Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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09-20-2006, 09:26 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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No, just on start up.
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Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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09-20-2006, 09:28 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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My bad, valve guide seals
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Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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09-20-2006, 09:28 PM
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Beam Me Up Scottie
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Join Date: Aug 2004
Location: Squantum (part of Quincy),
MA
Cobra Make, Engine: SPF1049 Titanium w/black stripes, 351W with Trick Flow Heads, Tremec 3550
Posts: 7,592
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Compression Test or Leak down test.
Probably valve guide seals. They can be easily replaced.
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Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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09-20-2006, 09:32 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
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Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
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Try this http://www.network54.com/Forum/74182/
These guys are great.
Felpro intake gaskets are BAD mine made it 3,000mi.
Try Victor.
__________________
Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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