lt1 spark plug gaskets
Thread Starter
Racer
Joined: Oct 2008
Posts: 423
Likes: 48
From: winchester Virginia
lt1 spark plug gaskets
Pulled a plug yesterday just to check (92 LT1, 62k miles); stock plug but no plug gasket. FSM says to use gaskets. I read some posts that debated plug gaskets on earlier models but nothing said about lt1's.
Anybody have info about this?
thanks
Anybody have info about this?
thanks
Drifting
Joined: Sep 2003
Posts: 1,363
Likes: 7
From: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
if memory serves, the LT1 plugs have a tapered seat (top of threads which contacts the head is not flat but angled).
I have never seen a tapered plug with a gasket (as the taper's purpose is to create the seal).
Chalk it up to a generic phrase or carryover from the L98, or a typo (there are a few in the FSM -- e.g. front caliper bracket bolt torque).
BTW, don't forget to use a torque wrench to re-install and use the re-install torque (not the new install torque).
I have never seen a tapered plug with a gasket (as the taper's purpose is to create the seal).
Chalk it up to a generic phrase or carryover from the L98, or a typo (there are a few in the FSM -- e.g. front caliper bracket bolt torque).
BTW, don't forget to use a torque wrench to re-install and use the re-install torque (not the new install torque).
Instructor
Joined: Apr 2007
Posts: 134
Likes: 0
From: new albany mississippi
Yeah, but how did the plug look? Gawd, the suspence!! I got a '92 w/60k, but I can't talk my fiance into changing the plugs for me, and there doesn't seem like much room in there for my sidewalk-scrapers...
Thread Starter
Racer
Joined: Oct 2008
Posts: 423
Likes: 48
From: winchester Virginia
The plugs weren't too bad, gap increased to about 0.07 and some of the platimum pucks were gone. As far as the job goes I only had to take of the AIR pipe and hoses on the driver side and I took off all of the brackets that hold the plug wire looms. I used tubing on the plugs to get them started and that wasn't difficult. The hardest part was getting the brackets back on. About a 4 hour job, but I am paranoid about buggering up aluminum threads so I was probably extra slow and careful.
