Spark plug gap VP 4.3L gxi-g - ACDelco 41-101 help

[donald maclaren]

I was reading the followig in a old post
BTW, should probably check to make sure that NGK BPR6EFS is the proper plug for that engine. 0.45 is the correct plug for that spark plug however.

I do know that Volvo has changed recommendations on plugs on many of these engines to the AC iridium plugs that are pre-gapped at 0.60. I would not be gapping those NGKs to 0.60."


I have a 2007 red volvo 4.3L GXI-g engine. pulled out old 41-993 Ac plugs and gap looked to be around the .05 - .0525. The new 41-101(next model up from 41-993) are gaped out of box .06. So Per my manual they say .06. Engine would not turn over. I pulled and gaped to .045 that I saw on some sites for the 4.3L EFI engine.

it started up just fine in drive, have not lake tested, ran for like 5 minutes and smooth.

I also read where people say you can't gap iridium plugs, is this even true, how can you sell a plug you can't gap?

My ultimate question is, how I can find out exactly what I should be gapping these 41-101 Ac Delco iridium plugs to on this engine? Any infoi or places to search or anything would be helpful.

Should I gap at 5 or 5.25 and split the difference? the iridium, do they inherently need smaller gap?



Thanks,
Don.
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[muc]

Hi Don, welcome to the forum.
If you post a serial number, I can give you the latest info from Volvo.

The reason most people recommend that iridium plugs not be regapped is because the coating is so thin it's almost impossible to do it without ruining the coating. Note that in most cases it doesn't wreck the plug, it just negates advantages of the iridium coating and makes it a conventional plug.

If your engine didn't start with the plugs gapped at 0.060" but did at 0.045" that means there is something else wrong.