CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
October 24, 2014, 06:20:29 AM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
105715 Posts in 12341 Topics by 4754 Members
Latest Member: Jake
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Decoding/Numbers
| | |-+  Water Pumps 3782608 and 3782609 casting dates??
« previous next »
Pages: [1] Print
Author Topic: Water Pumps 3782608 and 3782609 casting dates??  (Read 5020 times)
opelitis1
Member
***
Posts: 261


View Profile Email
« on: November 04, 2008, 02:12:09 PM »

Did GM put date codes on old water pumps and where..  Lotsa "Bubba" rattle can paint on the
2608 unit but I can make out a 6 with an "M" in a square.
On the other pump,  I see a "GM 3" on the front, and when I turn it over "S3" is  stamped on the rear..  The 2609 pump has a fitting somewhat like a BBC on the middle of the pump and the 2608 pump has a fitting 45 degree angled to the psgr. side... 
Any idea of the dates of these beasts and, what is best way to clean these e.g. media blast without marring the pumps...  Thanks!!  T.
Logged
JohnZ
CRG Member
*****
Posts: 4125


View Profile Email
« Reply #1 on: November 05, 2008, 11:53:50 AM »

Did GM put date codes on old water pumps and where.. 

Saginaw-cast 608's usually have the date code on the front of the driver's side leg, and Tonawanda-cast 608's usually have it directly below the weep hole in the snout. A raised "S" on the engine side of the casting (inside the pump, in the impeller area) says it's a Saginaw casting.
Logged

'69 Z/28
Fathom Green
CRG
69Z28-RS
Hero Member
*****
Posts: 2460


owner since '76


View Profile Email
« Reply #2 on: November 05, 2008, 03:11:22 PM »

Is there a source for seals and *Rebuild Kits* for such original water pumps?
Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
opelitis1
Member
***
Posts: 261


View Profile Email
« Reply #3 on: November 06, 2008, 06:36:06 AM »

Thanks encore John!!!  What is the besy way to clean the pumps??  If media blasting - what kind??  Is the Saginaw pump a Vette unit, C2, maybe and why was the fitting placed on the top akin to a BBC pump?  T.
Logged
Pacecarjeff
Member
***
Posts: 342



View Profile WWW
« Reply #4 on: November 06, 2008, 09:50:47 AM »

Water pumps were not dated until November 1965.
Pumps prior to that will not have a date code.
the 608 pumps were used as early as 1964
609 was used as early as 1957.
Logged
JohnZ
CRG Member
*****
Posts: 4125


View Profile Email
« Reply #5 on: November 06, 2008, 10:30:00 AM »

Is the Saginaw pump a Vette unit, C2, maybe and why was the fitting placed on the top akin to a BBC pump?  T.

The 608 pump was used on lots of SB applications for many years, including Corvettes. The boss and fitting at the top of the other pump was for a bypass hose to the front of the intake manifold; all 1963-67 carbureted small-block Corvettes with aluminum intakes and 63-65 fuelies used the intake bypass hose.
Logged

'69 Z/28
Fathom Green
CRG
opelitis1
Member
***
Posts: 261


View Profile Email
« Reply #6 on: November 06, 2008, 04:18:49 PM »

Thanks John and PacecarJeff for this great info..  I appreciate it!!! Ted
Logged
Pacecarjeff
Member
***
Posts: 342



View Profile WWW
« Reply #7 on: November 07, 2008, 11:15:45 AM »

Pretty sure you can't read the date when installed.
You can see only that there is a date there, or not.
So pretty much any dated pump will do for your Camaro.
Logged
bc69
Member
***
Posts: 209



View Profile Email
« Reply #8 on: June 17, 2014, 10:46:12 PM »

Can on sag's but not on ton's
Logged

Brad
RSSS
bc69
Member
***
Posts: 209



View Profile Email
« Reply #9 on: June 17, 2014, 10:50:36 PM »

My question is about which is correct and is there a preference as to sag or ton as well as date codes?
Logged

Brad
RSSS
JohnZ
CRG Member
*****
Posts: 4125


View Profile Email
« Reply #10 on: June 19, 2014, 11:27:59 AM »

My question is about which is correct and is there a preference as to sag or ton as well as date codes?

For Z/28's, they have to be Saginaw castings; for everything else, the block and water pump have to be from the same foundry source (the engine plants machined/manufactured the water pumps from raw castings).
Logged

'69 Z/28
Fathom Green
CRG
bc69
Member
***
Posts: 209



View Profile Email
« Reply #11 on: June 19, 2014, 11:53:35 AM »

So V1207MU would use ton 308 with date code maybe around L?6
? . Sound about right john?
Logged

Brad
RSSS
JohnZ
CRG Member
*****
Posts: 4125


View Profile Email
« Reply #12 on: June 20, 2014, 02:40:17 PM »

So V1207MU would use ton 308 with date code maybe around L?6
? . Sound about right john?

That's a Flint engine, so it needs a Saginaw-cast water pump, late November to very early December.
Logged

'69 Z/28
Fathom Green
CRG
bc69
Member
***
Posts: 209



View Profile Email
« Reply #13 on: June 24, 2014, 08:47:06 AM »

Ok thanks johnz. Wires crossed on that one. On the hunt!
Logged

Brad
RSSS
bc69
Member
***
Posts: 209



View Profile Email
« Reply #14 on: July 11, 2014, 07:44:06 PM »

Found this one that should work.
Logged

Brad
RSSS
Pages: [1] Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.077 seconds with 18 queries.