Smoke Question
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Smoke Question
I am getting a tiny bit of blue smoke on deceleration, and I can't for the life of me remember the old rule. For smoke, is it RINGS on acceleration and VALVES on deceleration, or the reverse? :confused:
Also, this 85 is belching dark grey/black smoke when I really romp on it, so I know I've got at least 1 bad injector. What is a good replacement set of injectors to go with?
[Modified by White85InOKC, 7:43 AM 3/15/2004]
Also, this 85 is belching dark grey/black smoke when I really romp on it, so I know I've got at least 1 bad injector. What is a good replacement set of injectors to go with?
[Modified by White85InOKC, 7:43 AM 3/15/2004]
Burning Brakes
Joined: Feb 2000
Posts: 824
Likes: 2
From: Camden SC
Re: Smoke Question (White85InOKC)
I would recommend a cylinder leak down test. Your compression ring(s) could have some wear, cylinder bore fair wear and tear taper, reduced tension on the oil control rings, just for starters. If the car doesn't smoke on start up, valve guides and seals may be OK.
Some parts stores may loan the special tools for for the cylinder leak down test.
Let us know.
dlmeyers 90 coupe zf6 3 speed shocks
Some parts stores may loan the special tools for for the cylinder leak down test.
Let us know.
dlmeyers 90 coupe zf6 3 speed shocks
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Re: Smoke Question (Jay 383)
Valve seals usually show just after starting the car after its sat for awhile, oils leaks past the seals and when you fire it up it smokes-normally not to long though. But do the compression test first-if you get a low reading squirt a little oil in the cylinder and retest-if comp. comes up its bad rings, if no change it's in the valve train :thumbs:
[Modified by rick lambert, 5:10 PM 3/15/2004]
[Modified by rick lambert, 5:10 PM 3/15/2004]
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Smoke Question (White85InOKC)
I am getting a tiny bit of blue smoke on deceleration, and I can't for the life of me remember the old rule. For smoke, is it RINGS on acceleration and VALVES on deceleration, or the reverse? :confused:
Also, this 85 is belching dark grey/black smoke when I really romp on it, so I know I've got at least 1 bad injector. What is a good replacement set of injectors to go with?
Dark grey/black smoke on acceleration is excessive fuel; you're running rich.
The blue smoke is most likely valve stem seals. Deceleration creates high vacuum which sucks in oil from the valve spring area.
Jake
[Modified by White85InOKC, 7:43 AM 3/15/2004]
Also, this 85 is belching dark grey/black smoke when I really romp on it, so I know I've got at least 1 bad injector. What is a good replacement set of injectors to go with?
Dark grey/black smoke on acceleration is excessive fuel; you're running rich.
The blue smoke is most likely valve stem seals. Deceleration creates high vacuum which sucks in oil from the valve spring area.
Jake
[Modified by White85InOKC, 7:43 AM 3/15/2004]
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