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/de...000&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]

Originally Posted by Tim

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]

Originally Posted by Wayne

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