Rate my sparkplugs

[13matsc]

Go ahead and rate them!
Tell me what you see and what you think?

3800 miles on them. A bit of residue from anti seize when the were installed in 2023.

 

[squaredeal91]

Half look pretty clean. The other half look dirty/oily or in the shadows?

 

[13matsc]

Yes I’m seeing some oil on at least 2, 4, 8 + 3 and 7.
Also did a compression test on all of them.

 

[Sad Sack]

Running Autolites in a Chevy? Blasphemy!
(but some aftermarket engines are spec'd for them)

Half are soiled and the other half look normalish. What if anything changed recently?

 

[Sad Sack]

Obviously your compression is more than stellar.

 

[squaredeal91]

Does it smoke for a second on startup sometimes/allot?

 

[Sad Sack]

Does it smoke for a second on startup sometimes/allot?

Wouldn't that point more to valve guide bushings or valve stem seals in the heads if it did?

 

[squaredeal91]

Wouldn't that point more to pushrod bushings or valve stem seals in the heads if it did?

Valve guide seals, yes that's what I was thinking

 

[idahovette]

Yeah, WTH is a "push rod bushing" @Sad Sack

 

[Snoots]

1, 5 and 7 look nice. 3, 2 and 4 look okay. I can't see 6 that well and 8 looks like . . .
When was the last time you blew the gunk out of it?

 

[Sad Sack]

Yeah, WTH is a "push rod bushing" @Sad Sack

 

[Sad Sack]

Yeah, WTH is a "push rod bushing" @Sad Sack

Ooops I'm old, and I drink, valve guides. Clearly, I wasn't thinking...

 

[13matsc]

Running Autolites in a Chevy? Blasphemy!
(but some aftermarket engines are spec'd for them)

Half are soiled and the other half look normalish. What if anything changed recently?

Will be AC delco next time Probably some shorties if I can find some. Having some clearance issues after headers were installed.

Does it smoke for a second on startup sometimes/allot?

Yea, some white smoke is visible. I have thought I might be just condesation, but maybe not?

1, 5 and 7 look nice. 3, 2 and 4 look okay. I can't see 6 that well and 8 looks like . . .
When was the last time you blew the gunk out of it?

What you mean by «blew the gunk»?

 

[AuroraGirl]

Will be AC delco next time Probably some shorties if I can find some. Having some clearance issues after headers were installed.


Yea, some white smoke is visible. I have thought I might be just condesation, but maybe not?


What you mean by «blew the gunk»?

goose her violently uphill on the onramp kinda thing With a full bed or trailer etc

Also, your spark plug tapered seat on the heads, one of them looks slightly dirty, worth checking out with a a flashlight and a degreaser rag or plumbing soldering wire brush in hand

 

[13matsc]

goose her violently uphill on the onramp kinda thing With a full bed or trailer etc

Also, your spark plug tapered seat on the heads, one of them looks slightly dirty, worth checking out with a a flashlight and a degreaser rag or plumbing soldering wire brush in hand

Thanks. No, this is a summer truck here in Northern Europe. Mostly nothing on the bed and just small trips in and around town. Some hauling now and then, maybe 5-6 times over the summer.

I’ll clean them up some. I applied copper anti seize on them when they were installed, but that works like glue for all kinds of debries I found out.