Technical Tips > Engines - Carbies - Exhausts - Dissys

Spark plug info - I'm a bit lazy

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Mattrix:
Sorry, have never changed plugs on a V8, didn't think they were accessible from the top, my mistake. They're a very foreign engine to me :)

77CVT:
Bit rough you haven't got a decent reply!  At least you are having a go!

I like NGK plugs.  Depends if you want standard plugs or Iridiums like me.  I think the stock AC Delco is R45TS?  I think that equates to BR5FS for NGK.  I'm using my memory so will have to check.

If you have stock exhaust manifolds it should be easy but some aftermarket ones require getting underneath to make it easier.  For some of mine I have to use a 5/8 (?) open end spanner as well.

Here's a Corvette Fever  article

craigh:
Hi 77CVT

Just checked the  boxes for ones I put in my 71.

NGK BP5F VG

The ones that came out were...

NGK BPR5 FS

Am sure there are heaps of temp ranges etc that will work fine.  Any car parts place will be able to offer a set to fit your 350.

Craig

Mattrix:
Ironically I was standing around at Autopro for about an hour today trying to work it all out :)
Meaning, it was earlier than when you guys replied! But never mind, I looked up Ecklers on my phone and worked out the AC Delco part, then we cross referenced it to the NGK part. So I ordered them in, and they had them later that arvo. Did the change before it got dark, but managed to shatter the ceramic part of 2 of them in the process. As I was putting them in I worked out that the metal part (where the lead attaches) is fatter on the NGK than on the Autolite APP26 that came out of it, meaning it was too stubby for my spark plug socket to fit over nicely without some serious jiggling. I had to go by feel since I couldn't see below the manifold, and both times I assumed the socket was on properly, turned it and "crunch". Have learned a sore lesson, and they'll be getting another 2 plug sales out of me tomorrow... :grr:
I hate learning the hard way.
thanks for your replies though guys, this will of course prove useful for future spark plug changers that visit the forums :)

77CVT:
Bummer!  I hate cracking a plug....but they are usually on my runabouts that never get a plug change in 4 years and are a bit hard to remove sometimes!  

Don't overtighten, especially if the heads are hot.

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