Spark plugs

[Tim]

I would like to try the new iridium spark plugs in my 1990 ZR-1. However, they only come with a tapered seat and have no washer. Will these still seat in my heads using the torque specs found in FAQ even though they have no washer? Also, do I need to use anti-seize on the threads?

Thanks,

Tim

[Wayne]

Tim Said:try the new iridium spark plugs in my 1990 ZR-1. However, they only come with a tapered seat and have no washer
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Hi Tim
Yes NGK does have the correct plug for the 90 as I have one also and just put some in mine W/washer. Go to NGK web site and click on part finder

http://www.ngksparkplugs.com/apps/default.asp?nav=60000&country=US

I think its stock no. 6341
Hope this helps

[We Gone]

I am using Rapidfire #5 in both the 90 & 91

[Tim]

Thanks Wayne, got them ordered

[thxalot]

Any of you have knowledge on the difference between Denso Iridium plugs and NGK Iridium plugs? I know they are the same company, but are these plugs the same too?

I ordered a set of the Densos. Just over a C-note at Autozone. A little pricey, but I hear they are worth it.

-Burt

[Wayne]

Tim Said:
Thanks Wayne, got them ordered
____________________________

Your Welcome Tim, Anytime

[Z Factor]

Also, do I need to use anti-seize on the threads?



It can not hurt, especially when you are dealing with our type of engines.

[Wayne]

Tim wrote:
Also, do I need to use anti-seize on the threads?



Z Factor wrote:
It can not hurt, especially when you are dealing with our type of engines.

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Never-seize/ Anti-seize is a bad thing on shallow aluminum threads like plugs, as it allows you to over torque, thus stretch the threads in the head. Bad thing is you don't have a clue you did it till its too late.

A new tire man I used to change tires on our pump trucks started using Anti-seize. Normally when you tighten lug nuts with 1" drv. impact you just let it hammer till nut stops turning. all of a sudden we had a rash of one or two studs broken off a wheel here and a wheel there.
When we put 2 and 2 together and talked to the Manufacturer I learned allot of what not to do with the stuff

Just sharing something we learned the hard way :!:

[Z Factor]

Z Factor wrote:
It can not hurt, especially when you are dealing with our type of engines.

------------------------------------


Never-seize/ Anti-seize is a bad thing on shallow aluminum threads like plugs, as it allows you to over torque, thus stretch the threads in the head. Bad thing is you don't have a clue you did it till its too late.

A new tire man I used to change tires on our pump trucks started using Anti-seize. Normally when you tighten lug nuts with 1" drv. impact you just let it hammer till nut stops turning. all of a sudden we had a rash of one or two studs broken off a wheel here and a wheel there.
When we put 2 and 2 together and talked to the Manufacturer I learned allot of what not to do with the stuff

Just sharing something we learned the hard way :!:

While I appreciate your story, using an impact wrench on lugs/nuts is a little different that a specific torque when installing plugs. As my mechanic once told me, when dealing with aluminum heads/engines, you don't want to risk a frozen bolt or plug. That isn't to say you must use it, but I stand by my original comment unless you know that GM specifically said not to use it.

:)

[Wayne]

Z Factor Wrote:
While I appreciate your story, using an impact wrench on lugs/nuts is a little different that a specific torque when installing plugs. As my mechanic once told me, when dealing with aluminum heads/engines, you don't want to risk a frozen bolt or plug. That isn't to say you must use it, but I stand by my original comment unless you know that GM specifically said not to use it.
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Forget the story. You missed the whole point of the post.
(seez)misspelled
>Never-seize/ Anti-seize is a bad thing on shallow aluminum threads like plugs, as it allows you to over torque

You Stated:
>a specific torque when installing plugs

If you use Never-Seez Brand Anti-Seize you will not get a specific torque.
Per the factory Rep at (Bostik Chemical) Never-seez.

You Stated:
>I stand by my original comment unless you know that GM specifically >said not to use it.

When GM specifically wants something on a fastener they state it ie loctite #222. GM does not say Do Not Use Loctite #222 on this Fastener. Can you imagine how thick a service manual would be if they labeled everything with what not to use!

You Stated:
>As my mechanic once told me, when dealing with aluminum >heads/engines, you don't want to risk a frozen bolt or plug

Thats about as good advice as you can get. Just not with Never-Seez Brand never-seize.

I did some homework next post

[Wayne]

Wayne wrote:
>I did some homework next post
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NEVER·SEEZ® Anti-Seize & Lubricating Compounds
The Anti-Seize Compound with a Million Ball Bearings
REGULAR GRADE

The "original" anti-seize compound and extreme pressure lubricant formulated with copper, graphite, aluminum and other ingredients to protect metal parts against rust, corrosion and seizure up to 1800ºF. Fine metallic and graphite particles in special grease protect parts even in high heat, high pressure and corrosive environments.

Prevents galling on steel to stainless steel, titanium,
magnesium, and other hard metals
Coefficient of Friction 0.057-0.063
Torque Coefficient, k factor 0.130
Extreme Pressure, psi 32,000

Product Applications:
Plant Maintenance
Mining
Pulp & Papermills
Metal Working
Waste Watertreatment
Farm Equipment
Textile Mills

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Permatex® Copper Anti-Seize Lubricant

A premium quality copper anti-seize and thread lubricant that may be used to prevent seizing, corrosion and galling where high temperature conditions exist. Contains a high percentage of micro-fine copper flakes in a semi-synthetic grease carrier and is fortified with high quality rust and corrosion inhibitors. Temperature range: -30°F to 1800°F. Provides good electrical conductivity. Meets Mil Spec #907E.

Suggested Applications:
Spark plug threads installed in aluminum, exhaust manifold bolts, engine bolts, oxygen sensors, knock sensors, thermostat housing bolts, fuel filter fittings, and battery cable connections.

Prod 09128 8oz- $9.35

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As you can see they are different as day and night
Permatex® Copper Anti-Seize
I never heard of it before, but I'm going to get some. Maybe this is what your mech. uses

[Z Factor]

Thats about as good advice as you can get. Just not with Never-Seez Brand never-seize.

I did some homework next post

I appreciate the homework you did. :cool:

I think we were just talking apples vs. oranges in that neither my mechanic nor I recommended the Never-Seez brand, just a general anti-seize product. After having read your research, it would seem advisable to avoid certain products, so it is important to do your homework . ;)