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Author Topic: What plugs to fit in my 3.2?  (Read 4711 times)

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TheBoy

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What plugs to fit in my 3.2?
« on: 05 May 2011, 12:23:02 »
Seeing as its LPG, should I stick to the quads, or get twins? If twins, are they the same as what goes in the MV6?
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Jimbob

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Re: What plugs to fit in my 3.2?
« Reply #1 on: 05 May 2011, 12:37:26 »
Twins - stronger spark possible iirc.

(and all Mark fits in anything iirc)

I beleive same as your mv6 yes.

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hotel21

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Re: What plugs to fit in my 3.2?
« Reply #2 on: 05 May 2011, 12:43:31 »
Quads in mine but purchased and fitted before I learnt from Mr DTM that the twins were probably the best option, performance wise, rather than the quads for longevity.

That said, mine are working quite fine, thanks...   ;D
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Re: What plugs to fit in my 3.2?
« Reply #3 on: 05 May 2011, 12:48:17 »
Quote
Quads in mine but purchased and fitted before I learnt from Mr DTM that the twins were probably the best option, performance wise, rather than the quads for longevity.

That said, mine are working quite fine, thanks...   ;D


snap
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Kevin Wood

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Re: What plugs to fit in my 3.2?
« Reply #4 on: 05 May 2011, 12:55:15 »
I use quads in mine on LPG with no issues.
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TheBoy

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Re: What plugs to fit in my 3.2?
« Reply #5 on: 05 May 2011, 13:32:35 »
Odd, I notice they list 2 different plugs for 3.0, based on engine number... ...why would they change the temp of the plug?
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Kevin Wood

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Re: What plugs to fit in my 3.2?
« Reply #6 on: 05 May 2011, 14:24:30 »
Quote
Odd, I notice they list 2 different plugs for 3.0, based on engine number... ...why would they change the temp of the plug?

Beats me.  :-/ Change in ignition leads as well, perhaps? Can't think of a significant change in engine spec or service regime that would have prompted it, and if they found a problem with one plug recommendation they would have changed it retrospectively? :-/
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TheBoy

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Re: What plugs to fit in my 3.2?
« Reply #7 on: 05 May 2011, 14:28:13 »
Quote
Quote
Odd, I notice they list 2 different plugs for 3.0, based on engine number... ...why would they change the temp of the plug?

Beats me.  :-/ Change in ignition leads as well, perhaps? Can't think of a significant change in engine spec or service regime that would have prompted it, and if they found a problem with one plug recommendation they would have changed it retrospectively? :-/
Guessing it was around the time when they modified oil pump and oil jets in the heads?

So would you chuck in twins or quads (about same price) - she is swing by dealer on way home from work...
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Kevin Wood

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Re: What plugs to fit in my 3.2?
« Reply #8 on: 05 May 2011, 14:33:07 »
I suspect either would be fine. I'm not helping, am I?

I would have tried twins last time if I'd remembered to look up the part number. ;D
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Marks DTM Calib

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Re: What plugs to fit in my 3.2?
« Reply #9 on: 05 May 2011, 14:42:28 »
Cant see the point in paying the extra for quads given that you are unlikely to let them stay in place for longer than 40K miles (and they tend to come loose well before the 80K interval).

They potentialy shield the flame front.

I have a set of 6 new ones if you want them
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TheBoy

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Re: What plugs to fit in my 3.2?
« Reply #10 on: 05 May 2011, 14:51:06 »
Quote
Cant see the point in paying the extra for quads given that you are unlikely to let them stay in place for longer than 40K miles (and they tend to come loose well before the 80K interval).

They potentialy shield the flame front.

I have a set of 6 new ones if you want them
The quads are only a few pence more...  ...but being anal, I like to change the plugs at 20k/2yrs anyway, whatever GM state.

It was the spark shielding I was concerned about, hence the Q.  I'll get her to pick 6 twins up from Stealers on the way home - TBE is recording misfires on No5 occasionally (along with flashing EML sometimes), so guessing the plugs (probably original) are past there best.


For reasons I dont want to go in to just yet, I don't want to touch the engine in any way until after tomorrow ::)
« Last Edit: 05 May 2011, 14:51:28 by TheBoy »
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Kevin Wood

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Re: What plugs to fit in my 3.2?
« Reply #11 on: 05 May 2011, 16:11:14 »
Quote
The quads are only a few pence more...  ...but being anal, I like to change the plugs at 20k/2yrs anyway, whatever GM state.
Well, the quads come out looking brand new after 40k, so no problems there with either, I'd imagine. ;D

Quote
For reasons I dont want to go in to just yet, I don't want to touch the engine in any way until after tomorrow ::)

 :-?
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TheBoy

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Re: What plugs to fit in my 3.2?
« Reply #12 on: 05 May 2011, 16:43:14 »
She's picked up half a dozen twins (and some of tunnie's junk, and paid for it :o) from dealer, so we will see how we get on.


I suspect the quads in there are shot, judging by the missfires it keeps recording. Suspect original at 59k.  Or the coil pack has let go...  ...now you mention it, its only ever recorded misfires on drivers bank... ...and only on LPG...
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Kevin Wood

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Re: What plugs to fit in my 3.2?
« Reply #13 on: 05 May 2011, 16:48:13 »
I guess you'll see problems on LPG first. Not sure there's much of an issue with the plugs lasting the distance but it's time to change them without a doubt.

Bet you won't need a socket to unscrew them, though. :o
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Re: What plugs to fit in my 3.2?
« Reply #14 on: 05 May 2011, 17:11:57 »
Quote
I guess you'll see problems on LPG first. Not sure there's much of an issue with the plugs lasting the distance but it's time to change them without a doubt.

Bet you won't need a socket to unscrew them, though. :o
It was all fine until I gave chrisgixer the keys whilst I had a chat with Albs ;D
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