AC DELCO plug # Help

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Mar 4, 2006 | 06:10 PM

rick lambert

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Le Mans Master

Joined: Oct 2003

Posts: 6,130

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From: seattle WA

AC DELCO plug # Help

Time for that tune up-87 vette, went to Autozone and got ACDELCOs
just like em-got part # 41-629, this concurs with NAPPA and Schucks-the reason I ask is-last time I took it in for plugs, the shop installed Autolite 26-the difference in lenght is astronomical, also the Autolite uses NO washer-the ACs do-anyone using the ACs part# 41-629??

Mar 4, 2006 | 07:50 PM

rick lambert

Thread Starter

Le Mans Master

Joined: Oct 2003

Posts: 6,130

Likes: 2

From: seattle WA

Cmon guys-here's the problem-owners manual AC Type FR3CLS, Haynes AC R43CTS, NAPPA, Autozone and Schucks AC 41-629, we all know plug #s have changed so much over the years they now cross reference-that's why I posted the Q

Mar 4, 2006 | 09:04 PM

Morley

Drifting

Joined: Mar 2005

Posts: 1,923

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From: GA

The FR3CLS are a flat seat plug with a washer, used in aluminum heads.
The R43CTS is a taper seat plug used in iron heads.
The 41-629 is the A/C replacement for FR3LS

Mar 9, 2006 | 10:19 PM

Vic'89

Safety Car

Joined: Jun 2000

Posts: 4,870

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From: Long Island, NY

Which ones are shorter ? The Delco or Autolite ?

Vic

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