Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
06-30-2013, 11:13 PM | #1 |
Carpe manana
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,446
|
Engine block code(s) correct for 72 and others
What are correct block codes for a 350 in 1972? My Blazer motor has two terminal letters I suspect are "C" and "E" - the motor was probably decked so these are subtle but I suspect the motor is original. Codes are located on a boss on the RH front of the block visible from the pass fender side. I have codes for K10s and K20s (they start w "T") but no K5s. For those who have original 350 4v motors in their Blazers, what are the engine codes? Mine has CA emissions equipment if that matters...thanks Pete
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland |
06-30-2013, 11:28 PM | #2 |
Registered User
Join Date: May 2013
Location: Covington, Louisiana
Posts: 243
|
Re: Engine block code(s) correct for 72 and others
I believe CE stands for Counter Exchange. If that is correct it could have been a warranty replacement engine.
__________________
1972 K5 Blazer Cheyenne 1966 L72 Corvette Convertible 2016 GMC Yukon Denali |
06-30-2013, 11:36 PM | #3 |
Carpe manana
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,446
|
Re: Engine block code(s) correct for 72 and others
Thanks! Plot thickens - I was wondering if the "T" was be decked off (TCE motor?) - curious to know what should have been in the truck (it has a TH350 tranny). Counter exchange is not something I'm familiar with - maybe that is case. All the little 4wd specific underhood parts are there: correct 4wd dipstick, bracket for AC vac pod, etc.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland |
06-30-2013, 11:49 PM | #4 |
Registered User
Join Date: May 2013
Location: Covington, Louisiana
Posts: 243
|
Re: Engine block code(s) correct for 72 and others
I just pulled this off of the Corvette Forum. A super knowledgable guy posted it.
"The "CE" block (and "CT" transmission) coding was introduced shortly after the 5/50 Powertrain Warranty went into effect for the '67 model year so the GM bean-counters could track the 5/50 warranty costs vs. the usual number of service replacement engines that were ordered by customers for normal customer-paid "over-the-counter" or "out-of-warranty" engine replacements, when it became obvious that the true cost of the 5/50 powertrain warranty was going to be FAR higher than the predictions when the program was sold to GM management. "CE"-stamped engines were supplied two ways - as short blocks, or as "fitted blocks" (block and fitted pistons, no crank or rods), the assumption being that all the bolt-on parts would be swapped over from the customer's failed engine. They started out being coded with "CE" followed by a number which indicated the calendar year they were built, and a sequence number which indicated how many replacement engines that particular engine plant had built that year, and shortly thereafter Flint Engine added a second letter digit that indicated the month built - don't know offhand if Tonawanda did this or not. The dealer ordered them from a chart that showed a part number for the engine assembly for each application so the engine would have the right internals, but this part number wasn't anywhere on the engine itself - only on a tag and label on the crate it came in. Occasionally "CE"-stamped short blocks were sold over-the-counter for various reasons in those days, but normally customer-paid service replacement engines had blank pads with nothing on them at all."
__________________
1972 K5 Blazer Cheyenne 1966 L72 Corvette Convertible 2016 GMC Yukon Denali |
07-07-2013, 09:25 PM | #5 |
Carpe manana
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,446
|
Re: Engine block code(s) correct for 72 and others
The digit after "CE" is 3 - I suppose this is a '73 replacement block.....what if any impact to collectability/originality is a counter exchange block?
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland |
07-07-2013, 09:48 PM | #6 |
Registered User
Join Date: May 2013
Location: Covington, Louisiana
Posts: 243
|
Re: Engine block code(s) correct for 72 and others
If it were a Corvette it would be huge, not sure about trucks. But I imagine there will come a time when matching numbers become even more desirable with these trucks as well. I wish mine had matching numbers.
__________________
1972 K5 Blazer Cheyenne 1966 L72 Corvette Convertible 2016 GMC Yukon Denali |
07-07-2013, 11:25 PM | #7 |
Carpe manana
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,446
|
Re: Engine block code(s) correct for 72 and others
Thanks! The Blazer was in such good shape I couldn't pass on it for the block alone. If it's a warranty replacement motor/block from GM I'll take it over a generic replacement. When I get time I'll check the heads to see if these are correct for the K5 as per date codes...
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland |
Bookmarks |
|
|