Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 12-30-2018, 05:05 AM
68 DANA's Avatar
68 DANA 68 DANA is offline
Yenko Contributing Member
 
Join Date: Jan 2011
Location: Manitoba, Canada
Posts: 559
Thanks: 57
Thanked 46 Times in 30 Posts
Default 427 GM Oil Pump - #3964255 vs GM Oil Pump - #3946023

GM literature lists oil pump c/w pick up - GM #3946023 used with 427 GM Deep Performance Oil Pan, 6 quart - GM #3879633. Other GM publications list oil pump c/w pick up - GM #3964255 used with 427 GM Deep Performance Oil Pan, 6 quart - GM #3879633

It is my understanding that oil pump - GM #3964255 came with the pick up that was not spot welded to the pump, allowing for optimum adjustment. Whereas the GM #3946023 came from GM already adjusted and tack welded.

Can anyone confirm?

Thanks!
Attached Images
 

Last edited by 68 DANA; 12-30-2018 at 02:24 PM.
Reply With Quote
Attachments - The Supercar Registry s-l1600 (2).jpg 001_resized(1).jpg
O Garage vBulletin Plugins by Drive Thru Online, Inc.
Click here to view all the pictures posted in this thread...
  #2  
Old 01-08-2019, 02:26 AM
68 DANA's Avatar
68 DANA 68 DANA is offline
Yenko Contributing Member
 
Join Date: Jan 2011
Location: Manitoba, Canada
Posts: 559
Thanks: 57
Thanked 46 Times in 30 Posts
Default

Btt
Reply With Quote
  #3  
Old 01-15-2019, 01:35 AM
68 DANA's Avatar
68 DANA 68 DANA is offline
Yenko Contributing Member
 
Join Date: Jan 2011
Location: Manitoba, Canada
Posts: 559
Thanks: 57
Thanked 46 Times in 30 Posts
Default

I received clarification on the differences. It appears that GM #3964255 is the correct oil pump that I need to located for the GM Deep Oil Pan #3879633.

GMPARTSWIKI lists the following description for the associated part numbers.

#3964255 Pump ASSY. (Oil) (Deep Oil pan Only)

#3946023 Pass. 396, Pump ASSY Oil


Thanks !

Last edited by 68 DANA; 01-15-2019 at 01:59 AM. Reason: Added Description
Reply With Quote
  #4  
Old 01-15-2019, 10:11 PM
WorkinProgress WorkinProgress is offline
Yenko Contributing Member
 
Join Date: May 2012
Location: Constitution State
Posts: 506
Thanks: 38
Thanked 193 Times in 104 Posts
Default

My NOS #3964255 oil pump has the pickup tack welded to the pump.

- Warren
Attached Images
 
Reply With Quote
The Following User Says Thank You to WorkinProgress For This Useful Post:
Hawkeye (01-16-2019)
  #5  
Old 01-15-2019, 11:04 PM
RALLY RALLY is online now
Yenko Contributing Member
 
Join Date: Feb 2008
Location: MI
Posts: 991
Thanks: 19
Thanked 145 Times in 101 Posts
Default

Quote:
Originally Posted by 68 DANA View Post
I received clarification on the differences. It appears that GM #3964255 is the correct oil pump that I need to located for the GM Deep Oil Pan #3879633.

GMPARTSWIKI lists the following description for the associated part numbers.

#3964255 Pump ASSY. (Oil) (Deep Oil pan Only)

#3946023 Pass. 396, Pump ASSY Oil


Thanks !
Yes the 3964255 pump is correct for the 6 quart oil pan. I had the whole complete assembly, oil pan, pump, curved windage try and bolts. I sold this set for 1.000.00 about 5 years ago.
Reply With Quote
  #6  
Old 01-15-2019, 11:21 PM
68 DANA's Avatar
68 DANA 68 DANA is offline
Yenko Contributing Member
 
Join Date: Jan 2011
Location: Manitoba, Canada
Posts: 559
Thanks: 57
Thanked 46 Times in 30 Posts
Default

Quote:
Originally Posted by WorkinProgress View Post
My NOS #3964255 oil pump has the pickup tack welded to the pump.

- Warren
That is one sweet oil pump....very nice.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:44 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.