Spark plug help for 1985 Chevy

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dshorty9681@aol.com - 27 Aug 2006 21:57 GMT

I just bought some spark plugs for my 1985 Chevy Truck and got online
to double check that they were the right ones on AC Delco's website.
They gave me R43TS and the website said that they were correct for a
305 "F"series engine, but I have a 305 "H" series which is supposed to
get R45TS. Will these still work? They seem to be different in the
length they penetrate into the engine. Can anyone help me in the
difference in the engines and/or plugs? Thanks!!

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SnoMan - 27 Aug 2006 23:52 GMT

>I just bought some spark plugs for my 1985 Chevy Truck and got online
>to double check that they were the right ones on AC Delco's website.
[quoted text clipped - 3 lines]
>length they penetrate into the engine. Can anyone help me in the
>difference in the engines and/or plugs? Thanks!!

The only differencebetween them is the heat raqnge of the plugs. 43's
are a bit colder than 45's. If it had 43's in it and they were burning
clean, stick with them but if the were dirty, loaded up or sooty
looking try the 45's
-----------------
TheSnoMan.com

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aarcuda69062 - 28 Aug 2006 00:59 GMT

In article
<1156712256.258738.74340@b28g2000cwb.googlegroups.com>,

> I just bought some spark plugs for my 1985 Chevy Truck and got online
> to double check that they were the right ones on AC Delco's website.
[quoted text clipped - 3 lines]
> length they penetrate into the engine. Can anyone help me in the
> difference in the engines and/or plugs? Thanks!!

There was a TSB back in the mid 80s that superseded the 45s to
the 43s.

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