Valve guides?
Thread Starter
Drifting
Joined: Sep 2010
Posts: 2,355
Likes: 188
From: Oakland CA
Valve guides?
I hadn't started my car in about 10 days because of a business trip to China.
At first start up I noticed a puff of blue smoke. Valve guides?
Would this be why I get a miss fire from one of the injectors after sitting for a week or so?
At first start up I noticed a puff of blue smoke. Valve guides?
Would this be why I get a miss fire from one of the injectors after sitting for a week or so?
Rennlist Member
Joined: Jul 2006
Posts: 5,424
Likes: 630
From: Bloomfield, MI
Is this for the 80in sig, how many miles?
What you describe is typical of Valve guides or more likely old rubber Valve Seals, as they are wear items.
I would do a warm Compression and Leak down test as a baseline.
What you describe is typical of Valve guides or more likely old rubber Valve Seals, as they are wear items.
I would do a warm Compression and Leak down test as a baseline.
Three Wheelin'
Joined: Nov 2003
Posts: 1,481
Likes: 1
From: Doylestown, PA
I think a leaky injector could cause the same symptom. I'd determine which injector is leaking replace it and see if the smoke issue resolves itself. You don't want to leave it leaking as it is potentially damaging to the rings, bore and piston.
Administrator
Joined: Aug 2001
Posts: 27,525
Likes: 3,082
From: Up Nort
If it's valve guides you'll see oil deposits on the spark plugs.
My 81 would smoke like it was on fire if it sat longer than a week. Most of the spark plugs looked like they were dipped in margarita salt.
My 81 would smoke like it was on fire if it sat longer than a week. Most of the spark plugs looked like they were dipped in margarita salt.
Thread Starter
Drifting
Joined: Sep 2010
Posts: 2,355
Likes: 188
From: Oakland CA
I have about 120k on the clock. This was the first time I noticed it smoke on start up. I think my balky injector and or valve seals are related. I'll pull the plugs and report back.
If in fact it is valve seals, this means I have to pull the heads off...oh boy!
The reason people buy new cars is that they can't afford old cars.
If in fact it is valve seals, this means I have to pull the heads off...oh boy!
The reason people buy new cars is that they can't afford old cars.
