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Thread: NGK spark plugs

  1. 5th September 2009, 12:39 PM #1
    PaulP38a's Avatar
    PaulP38a
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    NGK spark plugs

    About to put the heads back on the Rangie

    Went to local autopro and bought some new spark plugs. The bloke looked up the car in his book and brought out some NGK PFR5G-11 "Laser Platinum Premium" @ $26 each!! I bought them anyway.

    Just looking up the application guides to confirm gap should be 0.9mm for these plugs and can't find the P38A listed.

    Anyone had any experience with these plugs on a P38A?

    cheers
    Paul.
    My toys, projects and write-ups at PaulP38a.com
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  2. 5th September 2009, 01:08 PM #2
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    PaulP38a
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    funny thing just happened... removed one of the old plugs from the old heads and it was a NGK PFR5G-11.

    I can answer my own question now...

    Still, your good/bad experiences with these plugs are welcome.
    My toys, projects and write-ups at PaulP38a.com
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  3. 5th September 2009, 03:31 PM #3
    richard4u2 Guest
    arent these the ones you not suppose to alter the gap on , read it some where
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  4. 5th September 2009, 04:25 PM #4
    eb220
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    Paul,

    Went to the NGK website. 1.1mm is the gap to set it to. Have a look in the spark plug settings on Rave and see what it recommends. Hopefully should be about the same.

    I did the same for my RRC, and it came up the same as the workshop manual.

    Chris
    Last edited by eb220; 5th September 2009 at 04:28 PM. Reason: Additional info
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  5. 5th September 2009, 04:40 PM #5
    Hoges
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    G'day Paul
    If you try and alter the gap you're in danger of stuffing the precious metal layer on the electrode. The factory-set 1.1mm gap should be fine given the output from the coils.

    suggestion: buy some dielectric grease and (sparingly) smear it around the sp's insulator prior to refitting the boot. The grease will make it easier to replace the boot and act as a sealant from moisture etc. It also reduces flashing and voltage leakage from the plug.

    Super-not-so-cheap sell ?permatex brand dielectric grease in a tiny bubble for $4. something. (equates to close to $1000 /kg!!!)

    I have recently tried good ol' Lanoline grease (the green stuff) ... its dielectric properties are as good as the Permatex stuff at a fraction of the price... Also used it on my LS1 commodore ... excellent results
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  6. 5th September 2009, 05:05 PM #6
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    PaulP38a
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    thanks guys... luckily I read the label on the box that said not to adjust the gap...

    will get some grease tomorrow

    currently doing stage 2 of tightening head bolts... another 90deg yet!! I don't like this bit.

    cheers
    Paul
    My toys, projects and write-ups at PaulP38a.com
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  7. 5th September 2009, 05:16 PM #7
    Sprint
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    $26 for a platinum tipped plug? wtf?

    sheesh, and to think i fitted double platinum tipped AC-delco plugs in my XR8 last weekend..... and only $6-something each.... gotta love staff pricing lol

    the AC-Delco platinum tipped spark plug is #41-800, pre-gapped to 1.12 mm and available from your local friendly Holden dealer, i'll get a price for you on monday
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  8. 7th September 2009, 06:10 PM #8
    Sprint
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    the AC-Delco 41-800 retails for $8.80 at work
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  9. 7th September 2009, 09:26 PM #9
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    PaulP38a
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    Quote Originally Posted by Sprint View Post
    the AC-Delco 41-800 retails for $8.80 at work
    thanks for rubbing the salt in
    My toys, projects and write-ups at PaulP38a.com
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  10. 12th September 2009, 08:56 AM #10
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    adm333
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    Paul

    I use NGK Iridium BPR5EIX

    says it has 0.9 mm gap

    Usually around $20 each

    Dave
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