Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks


Previous Thread
Next Thread
Print Thread
Rate Thread
#320319 10/04/14 09:15 PM
Joined: Jun 2013
Posts: 29
drlenn Offline OP
Grease Monkey
OP Offline
Grease Monkey
Joined: Jun 2013
Posts: 29
I noticed that a GMC truck oil pressure gauge has the range of 0 to 60# does that mean that GMC engines were insert bearing engines rather than babbitt oil slingers?

Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


drlenn #320347 10/05/14 07:02 AM
Joined: Nov 2004
Posts: 434
Likes: 2
Backyard Mechanic
Offline
Backyard Mechanic
Joined: Nov 2004
Posts: 434
Likes: 2
That is correct. My 36 GMC has insert bearings and a 0-80 psi gauge, however mine runs in the 20 to 40 psi range.


1936 GMC T-14 low cab. TA for 1935-37 GMC, Director of the Gulf Coast Region
dunfire #320419 10/05/14 09:04 PM
Joined: Jan 2002
Posts: 30,699
Likes: 141
ChatMaster - 25,000
Offline
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,699
Likes: 141

GMC used a variety of of GM enigines. Up to 1933 the 1/2 ton used the Pontiac 6 cyl. engine in the small trucks. Large trucks had versions of various 6 and 8 cyl. Buick engins.
In 1934 they used the flat head 6 cyl. Oldmobile engine in the small trucks. This continued through 1938. In 1939 they came out with their own valve-in head straight 6. Itused a few odd chevrolet parts.
All of the above mentioned engines had full pressure oiling and by about 1933 went to rod bearing inserts.
Chevrolet went with the splash oiling in trucks through 1953. Rod inserts and full pressure came in 1954.
By mid 1920 all GM engines had full pressure oiling except Chevrolet.

If any of the above is in error one of our new GMC members can correct me.


Gene Schneider
Joined: Jun 2013
Posts: 29
drlenn Offline OP
Grease Monkey
OP Offline
Grease Monkey
Joined: Jun 2013
Posts: 29
Have gotten the motor # A228 302 731 from the engine and have determined that the size of the truck is 228cu. The motor casting GMC - 5 # 6107326 which I think makes this engine a 1952. The cab # is 253 22 S 25.. which I think means it is a one ton vehicle. Does any of this make sense? Can anyone provide any more information or correct my research errors.

drlenn #321193 10/13/14 10:27 AM
Joined: Jan 2002
Posts: 30,699
Likes: 141
ChatMaster - 25,000
Offline
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,699
Likes: 141
A 253-22 is a 137" wheelbase 253 is a 1 ton from the info. I have.


Gene Schneider
Joined: Oct 2014
Posts: 9
Grease Monkey
Offline
Grease Monkey
Joined: Oct 2014
Posts: 9
Actually I think the '39 and later GMC 6 cyln engines used very few Chevrolet parts. It is my understanding that the GMC engine is quite similar to the Buick in-line's. All of the GMC OHV 6's had insert bearings, rods and mains.
I know the water pumps from some Chevy 216's will fit the GMC's as will the bell-housings.
When I put a GMC 270 in my '38 Chevy in 1951 I used a '39 Chevy water pump, it was shorter than the GMC pump, and the '38 Chevy bell-housing. The three speed Chevy trans spline fit perfectly.
I used the stock Chevy oil pressure gauge. The minute I hit the starter the needle went out of sight, (80lb's on 30lb) The needle came back into sight when the engine was turned off..


Bill 64 C10
blucar #321484 10/15/14 09:40 PM
Joined: Jan 2002
Posts: 30,699
Likes: 141
ChatMaster - 25,000
Offline
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,699
Likes: 141
Thats correct, only minor parts were shared with Chevrolet.
By the way, a Buick didn't have rod inserts until 1948.


Gene Schneider
Joined: Oct 2014
Posts: 9
Grease Monkey
Offline
Grease Monkey
Joined: Oct 2014
Posts: 9
I always found it to be quite odd that Buick stayed with the babbit bearing for so long, of course the Buick's were not well known for having rod bearing problems like the Chevy "stove bolt sixes".


Bill 64 C10
Joined: Jun 2003
Posts: 70
Shade Tree Mechanic
Offline
Shade Tree Mechanic
Joined: Jun 2003
Posts: 70
Originally Posted by Chev Nut
...Oldmobile engine in the small trucks. This continued through 1938. In 1939 they came out with their own valve-in head straight 6. Itused a few odd chevrolet parts...
If any of the above is in error one of our new GMC members can correct me.
Not exactly but close enough. '38 light duty GMCs used a Pontiac flathead. The 228-236-248-270-302 inline six gasoline engines are all the same size block and why they are easily interchanged among models. 39-62 was the production window for that size block, though 60-62 the 302 only for military. Post '52 military blocks were sealed engines to run on a snorkle so they are the same size but set up differently and need modifications to use in civilian GMC truck applications.


http://www.OldGMCTrucks.com
Restoration and Preservation Resource
VCCA Member#50165
drlenn #324953 11/18/14 07:07 AM
Joined: Jun 2003
Posts: 70
Shade Tree Mechanic
Offline
Shade Tree Mechanic
Joined: Jun 2003
Posts: 70
Originally Posted by drlenn
Have gotten the motor # A228 302 731 from the engine and have determined that the size of the truck is 228cu. The motor casting GMC - 5 # 6107326 which I think makes this engine a 1952. The cab # is 253 22 S 25.. which I think means it is a one ton vehicle. Does any of this make sense? Can anyone provide any more information or correct my research errors.
http://www.oldgmctrucks.com/photos/EngineSpecs_Pg1G.gif
A indicates the size of the cylinder, rod, and, crank journals which in this case is + 5 thousandths on cylinder bore and - 10 thousandths on the crank and rod journals.
228 indicates the engine size
302731 is the regular sequential production number of the engine


http://www.OldGMCTrucks.com
Restoration and Preservation Resource
VCCA Member#50165
drlenn #474088 09/09/22 10:57 PM
Joined: Sep 2022
Posts: 1
Grease Monkey
Offline
Grease Monkey
Joined: Sep 2022
Posts: 1
Hello guys! I just joined the forum.

I have a 1954 GMC with a 248. Im currently having the engine rebuilt and and am curious to know what engine parts can work with both the 228 and 248. This will help me source these rare parts. My first question is the oil pump? Did the 228 and 248 use the same size oil pump?

drlenn #474119 09/11/22 12:39 PM
Joined: Aug 2004
Posts: 3,467
Likes: 48
ChatMaster - 3,000
Offline
ChatMaster - 3,000
Joined: Aug 2004
Posts: 3,467
Likes: 48
Most listings for parts, whether in a paper catalog or online, will list all of the applications for a given part. I don't think you will have to do your own interchange investigation.
There is a forum called Old GMC Trucks where they speak only GMC. It would be a good resource for you. Good Luck with your project.

Mike


ml.russell1936@gmail.com

Many miles of happy motoring

Link Copied to Clipboard
Support The VCCA!

Enjoy the forum? Become a VCCA member! The World's Best Chevrolet and GMC Club!


Member Photos
1964 Chevrolet Impala SS
1964 Chevrolet Impala SS
by DreamChevy, February 17
My 1933 Chevy 2 Dr. Sedan
My 1933 Chevy 2 Dr. Sedan
by 1939Chevy1, November 24
Back on the road 79 years later
2 1927 Chevrolet Trucks
2 1927 Chevrolet Trucks
by 1927TRUCKS, June 7
Who's Online Now
3 members (JEC51, Rustoholic, beachbum), 74 guests, and 7 robots.
Key: Admin, Global Mod, Mod
Newest Members
NeilA, Jayhicks, Tomvanhouten, Dads29Chevy, Tractorman
18,308 Registered Users
Today's Birthdays
aristech, RalphL, tonysk
Forum Statistics
Forums58
Topics59,071
Posts429,062
Members18,308
Most Online1,133
Jan 22nd, 2020
 

Notice: Any comments posted herein do not necessarily reflect the official position of the VCCA.

Powered by UBB.threads™ PHP Forum Software 7.7.5