Evening everyone
Does anyone know what the standard size measurement of pistons, big end bearing and main crankshaft bearings are on a post war engine for a willys jeep please ??
Just about to have an engine overhaul!!
Also looking to find out year of block, its stamped what looks like MC89199...any info appreciated....thanku
Regards Martin
Piston,big end, main bearing measurements
-
- G-Corporal
- Posts: 21
- Joined: Wed Aug 14, 2019 11:49 am
- Location: Uk
-
- G-First Lieutenant
- Posts: 667
- Joined: Sun Jul 29, 2018 4:55 pm
- Location: Someplace in 1944..
Re: Piston,big end, main bearing measurements
Hi,
Based on the serial number, you have a block originally installed in an M38.
You should verify the numbers in case there was a typo in my manual, but this is what I have handy for the postwar blocks:
L-134 Bore: 3.125" to 3.127" [source: Service Manual for Universal Jeeps]
Crankshaft main journal, standard: 2.3341" to 2.3331" [source: Service Manual for Universal Jeeps]
Crankshaft connecting rod journals: 1.9383" to 1.9375". [source: Service Manual for Universal Jeeps]
Based on the serial number, you have a block originally installed in an M38.
You should verify the numbers in case there was a typo in my manual, but this is what I have handy for the postwar blocks:
L-134 Bore: 3.125" to 3.127" [source: Service Manual for Universal Jeeps]
Crankshaft main journal, standard: 2.3341" to 2.3331" [source: Service Manual for Universal Jeeps]
Crankshaft connecting rod journals: 1.9383" to 1.9375". [source: Service Manual for Universal Jeeps]
- dpcd67
- G-General
- Posts: 11813
- Joined: Mon Jul 25, 2011 3:41 pm
- Location: Iowa
Re: Piston,big end, main bearing measurements
MC 89K engine is a very late M38 engine made probably in 1952. If you are working on any L134 you need the TMs associated with them, and as referenced above, the Jeep Universal civilian manual. You can't possibly work on an engine without the TMs. 9-1803A is the WW2 TM; I would tell you the M38 but it is upstairs and you can look it up.
U. S. Army 28 years.
Armor Branch
Armor Branch
-
- G-Corporal
- Posts: 21
- Joined: Wed Aug 14, 2019 11:49 am
- Location: Uk
Re: Piston,big end, main bearing measurements
Thanks for the information....just for reference, is there a site that gives info on engine serial numbers??
- dpcd67
- G-General
- Posts: 11813
- Joined: Mon Jul 25, 2011 3:41 pm
- Location: Iowa
Re: Piston,big end, main bearing measurements
Yes; Google Willys jeep engine numbers and you will get it.
U. S. Army 28 years.
Armor Branch
Armor Branch
Who is online
Users browsing this forum: No registered users and 56 guests