They've been in there since early 2021. I plan on changing them all out when I get the car back from the welding shop.
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- Thread starter 1971Chevelle
- Start date
Sticking with the Autolite 3924. They work, so no need to mess with them.
Those look just fine. Big fan of just a good AC plug, 45 heat range.
Chevelle_Nut
Shop Foreman
AC Delco for a GM car.
The Autolites have worked fine in my stroker engines, and I believe that they are just a tad shorter (which helps on cylinder #6).
I guess you didn't see my post about that:
Just lovely...
I discovered this while lubing the front end this morning. Luckily the guy who fixed the issue with the upper trailing arm mounting holes on this beast can get me in early this afternoon to get it fixed. Pictures aren't super clear - hard to get good pictures underneath the car with no good...
oldchevelles.com
I went to Autozone to get the new spark plugs. I had them pull one of the AC Delco equivalents, and it was actually longer than the Autolite by quite a bit. That won't work with the headers.
Watch for Made in China, plugs look like they're burning just fine
Here are the passenger side ones. I am a little concerned about number 8 (the first pic is 2-4-6-8 from left to right - second pic they are in the opposite order).
It's already put back together. I am thinking that oil is getting into the cylinder.
cage2592
Administrator
Usually you see it on old engines for a few reasons. Oil drains to the back of the engine and if the valve seals are leaking or old, when the oil pools at the rear it will seep in. some older iron heads have smaller drains as well. these can get plugged with old oil which helps retain pooling oil. Or, like Kevin eluded to, rings.
Honestly though, comparing to the others, its not super bad. yes its gooked up but not nearly as bad as I've seen and or super passed what the others look like.
Honestly though, comparing to the others, its not super bad. yes its gooked up but not nearly as bad as I've seen and or super passed what the others look like.
A good leak down test is in order. I'd also suspect the guide or the seal, but probably more the guide.
I think I will just plan on changing them out every 2 years or so, instead of the 4+ years on this last set.