CRG Discussion Forum

Camaro Research Group Discussion => Originality => Topic started by: x66 714 on September 03, 2016, 12:09:30 AM

Title: 4939899 fan clutch????
Post by: x66 714 on September 03, 2016, 12:09:30 AM

I have 2 fan clutches stamped 4939899. One is 041-69 & the other is 218-69. Is this a number that was used for a Camaro? Looked on the internet but nothing definitive....Thank you, Joe

Title: Re: 4939899 fan clutch????
Post by: ZLP955 on September 07, 2016, 10:32:49 AM

Do they have 'Delco Prod Div GMC' and 'Dayton Ohio USA' on the front? I'll have to check my AIM for the number you stated, but recall that was the smaller diameter clutch unit, with the short fins, used on non-solid lifter applications - possibly with A/C or HD cooling. The Julian date codes are consistent with mid and late 1969 production.

Title: Re: 4939899 fan clutch????
Post by: x66 714 on September 07, 2016, 11:28:13 AM

Yes. They both have that lettering. Both are stamped CH & both are on 772 fans.
I know they're not correct for my 69 396 car w/air..Joe

Title: Re: 4939899 fan clutch????
Post by: ZLP955 on September 25, 2016, 12:01:57 AM

Joe I meant to follow up on this earlier. The '69 AIM calls up 4939899 under RPO K02. Sheet A1 lists the clutch numbers and descriptions as follows:

3937780 CLUTCH ASM "327" ENG
3937782 OPT
4939899 OPT
3946049 "350", "396" ENG
So that appears to indicate that 4939899 would not be for the 327, 350 or 396 engines, although the 2 other 'OPT' versions may be related to another RPO?
Also there is a note '6' against 4939899 on the AIM, but my copy has poor print definition in the revision history, and I can't make out what note 6 says.

The fan is also shown on K02/A2 and there are 2 listed:
3947772 BLADE ASM-FAN
3956684 OPT ("327", "350" ENG ONLY)
So if your fan and clutch were originally together, that also appears to indicate they weren't on a 327 or 350.

Title: Re: 4939899 fan clutch????
Post by: x66 714 on September 25, 2016, 02:35:33 AM

Thank you....Joe

Title: Re: 4939899 fan clutch????
Post by: zbo2 on April 06, 2024, 08:59:53 PM

Just researching and saw this. I know it's a little old but my 7A Z28 had this fan clutch (4939899) dated 160-69 with what looks like CH ink stamped on it ( the H is faded in spots) on the correct dated 772 fan. Thinking it is original but not sure.

Title: Re: 4939899 fan clutch????
Post by: KurtS on April 07, 2024, 02:49:14 AM

http://www.camaros.org/coolingsystems.shtml#fan
CH is an AC or K02 car, not Z28.

Title: Re: 4939899 fan clutch????
Post by: zbo2 on April 07, 2024, 03:42:09 AM

Thanks Kurt..........I did see that after the fact. Just weird how the fan and clutch were both dated within a month of the car being produced.