[DeTomaso] Spark Plugs

[Will Kooiman]

Thanks.

I was pretty sure that mine with a gasket seat just reaches the bottom
thread.  Mine will take either taper or gasket.

I'll take a closer look when I start working on the engine.

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of JDeRyke at aol.com
Sent: Sunday, August 01, 2010 2:16 AM
To: wkooiman at earthlink.net; detomaso at realbig.com
Subject: Re: [DeTomaso] Spark Plugs

In a message dated 7/31/10 8:27:22 PM, wkooiman at earthlink.net writes:

> Jack - is there a reason you are running 5/8" reach plugs?
> 
I checked the depth of my SVO A-3's threaded sparkplug hole- which has a 
tapered seat and does not use a gasket- and got 0.625". Then during a
tune-up 
I noticed that my wife's aluminum-head Chevy Z-28 engine used such plugs. 
Screwing them into the A-3s on a bench, it appeared they just reached the 
bottom thread, which is proper to prevent carbon build-up. Note these heads
are 
date-stamped in the rocker arm chamber: one says '83, the other '84. Later 
ones might be different, I guess. FWIW- J DeRyke
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