I believe the 'finger tight plus 1/4 turn' method applies only to spark plugs
that use the crusher ring type seal, and not to tapper seat plugs.
Harlan
---------- Original Message ----------------------------------
From: "James H. Nazarian, Ph.D." <microdoc@apk.net>
Reply-To: "James H. Nazarian, Ph.D." <microdoc@apk.net>
Date: Fri, 26 May 2000 08:20:08 -0400
>James (the younger),
>
>I believe Simon is right. I remember reading the same "finger tight + 1/4 turn"
>on one of those little slips of paper packed with Bosch plugs I used in my BMW
>2002. It also had an aluminum head: the car that is, not the slip of paper. I
>don't think the paper had a head.
>
>Jim (the older and more senile guy)
>
>James Nazarian Jr wrote:
>
>> this is the rule that I have always gone by. but I have yet to put plugs
>> into any aluminum heads (this includes my V8)
>>
>> James Nazarian
>> 71 B Roadster
>> 71 BGT
>> 63 Buick 215
>>
>> "Aerodynamics are for people who cannot build engines"
>> Enzo Ferrari
>>
>> ----------
>> > From: Simon Matthews <simon_atwork@hotmail.com>
>> > To: mgs@autox.team.net
>> > Subject: Re: Aluminum heads -- spark plug torque
>> > Date: Thursday, May 25, 2000 5:59 PM
>> >
>> > I remember being told (or reading) that one screws the plug in until the
>> > gasket is toght aganst the head (not but not compressed), then give the
>> plug
>> > a 1/4 turn to compress the gasket. This only works on brand-new plugs,
>> > though! Any comments on this?
>> >
>> > Having fitted plugs into aluminium heads, I would think one would have to
>> be
>> > over-tightening rather drastically to strip the threads.
>> >
>> > Simon
>> > ________________________________________________________________________
>
>
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