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Sparkplug type and crush washers ?
https://slantsix.org/forum/viewtopic.php?t=29429		 Page 1 of 1
Author:  Spider1 [ Tue Jun 10, 2008 9:42 am ]
Post subject:  Sparkplug type and crush washers ?
Hi,
In researching various sparkplug information posts/searches in here.
I see that that NGK plugs are recommended.
(With crush washers removed. Is the reason for removing them to get a better oil seal ?)

I will go with these recommendations on my next plug change.

But in the meantime? I have new sparkplug tube 'rubber seals' and perfectly good AC-Delco "R45XLS" plugs (that do cross reference to NGK plug #2635, per "Car-Quest")

So, until I do a plug change? are the AC-Delco's OK ?
If so, should I discard the crushwashers on them ?

Thanks in advance !

:)
Author:  SlantSixDan [ Tue Jun 10, 2008 10:12 am ]
Post subject: 
See this post. The metal ring washers are not used on '63-'74 heads. It's to do with electrode positioning and spark plug running temperature, not oil sealing. The ACs will be fine until it's time to change to new plugs; the NGK ZFR5Ns will work a little better.
Author:  Spider1 [ Tue Jun 10, 2008 1:13 pm ]
Post subject: 
Quote:
See this post. The metal ring washers are not used on '63-'74 heads. It's to do with electrode positioning and spark plug running temperature, not oil sealing. The ACs will be fine until it's time to change to new plugs; the NGK ZFR5Ns will work a little better.
Thanks Dan !

:)
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