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The question, initially posted May 23, 2005, was:
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this weekend?"

After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.


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What did you get done on your Bolt today????


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Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438088 Fri Jan 21 2022 01:39 AM
Joined: Jan 2016
Posts: 706
G
Goach2 Offline OP
'Bolter
Machine shop said run 20 minutes at 2000 rpm. That was about it. Any additional advice is appreciated!


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438106 Fri Jan 21 2022 03:07 AM
Joined: Apr 2005
Posts: 10,673
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
Do not start it and shut it down repeatedly. Wait until it’s ready, radiator full. Fresh supply of gas. Then do your 20 minutes @ 2000. Starting and stopping is not good for the cam.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2) “Emily”
‘39 Dodge Businessmans Coupe “Clarence”



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Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438129 Fri Jan 21 2022 12:56 PM
Joined: Nov 2021
Posts: 161
W
'Bolter
As Justhorsenround said, it is critical to avoid start ups and low rpm operation. I would treat the 2000 rpm number as a minimum as you want to keep the cam lobes lubricated for the break-in period. A break-in oil additive is a good idea as engine oils these days tend to be formulated for modern engines that do not have the same cam break-in concerns.


1949/50 3600 Project
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438138 Fri Jan 21 2022 02:07 PM
Joined: Jan 2016
Posts: 706
G
Goach2 Offline OP
'Bolter
Ok, I need to figure out the oil situation first then. I have a Pontiac manual, which states that it need 4 qts and 1 more for the filter. I put 5L in, which is like 5.2qts. The engine came with a dipstick and tube, which wasn't installed, but I was told is the original. I replaced the tube with one almost of identical length, using Deve's instructions. 5L takes me to the 'Low Oil' mark on the stick. From bottom of washer to tip, it's 15-3/4" long, 14" to the 'Full' mark. The tube is about 8.1" long and sits 7-3/8" from block to tip. The way it sits, it feels like it needs one more quart, but I'm concerned about over filling it. This engine is out of a Pontiac, and I have the letter from GM stating that. Perhaps someone put a truck pan on it at one time?


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438169 Fri Jan 21 2022 07:00 PM
Joined: Jan 2016
Posts: 706
G
Goach2 Offline OP
'Bolter
I'm going to take some measurements of the oil pan and compare to another that I have from a truck (they look the same). If it comes out the same, does that mean that they both have the same capacity? From what I've read, trucks with 235/261 typically use 6qt with a filter...


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438202 Sat Jan 22 2022 12:24 AM
Joined: Jan 2016
Posts: 706
G
Goach2 Offline OP
'Bolter
I have this pan out of a truck and the deepest part of the pan (approx 9"x9"x7") is actually a bit smaller than the one on the new engine. Not sure if that speaks to amount of oil?

[img]https://www.stovebolt.com/ubbthread...umber/38915/filename/20220121_192217.jpg[/img]


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438218 Sat Jan 22 2022 02:17 AM
Joined: Jan 2016
Posts: 706
G
Goach2 Offline OP
'Bolter
Got some welding done while I ponder the oil situation...

[img]https://www.stovebolt.com/ubbthread...umber/38921/filename/20220121_211530.jpg[/img]


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438223 Sat Jan 22 2022 03:06 AM
Joined: Sep 2010
Posts: 1,349
K
'Bolter
Is the oil pan the one that was on the engine when you got it .one of the posts I read says the oil pan has to match the oil pickup.


kevinski 1954 GMC 9300 Welcome to the virtual Garage [stovebolt.com]
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438234 Sat Jan 22 2022 05:10 AM
Joined: Sep 2010
Posts: 1,349
K
'Bolter
Here is some imfo on dipstick from this site under 261 oil dipstick

Attached Files
45AE5C94-B419-4A5C-A2CC-32B8A95AEF1D.png (869.56 KB, 77 downloads)
D9DB373A-5C2A-47D3-A5EF-533EA25CA10B.png (116.92 KB, 74 downloads)

kevinski 1954 GMC 9300 Welcome to the virtual Garage [stovebolt.com]
Re: 1948 Thriftmaster 3/4 ton - Poncho engine swap
Goach2 #1438251 Sat Jan 22 2022 01:46 PM
Joined: Jan 2016
Posts: 706
G
Goach2 Offline OP
'Bolter
This is the pan that was on the engine when I got it and I have to assume it's original.

I think this one best describes the dipstick, as I measure about 14" to full line:

58-59
ALL (6 cyl.) exc. Ser. (3C-3D-3F)
13 13/16" under washer to full line
14 13/32" under washer to add line


1948 Chevrolet Thriftmaster 3/4 Ton
There are only 10 types of people in this world, those who can read binary and those who can't.
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