Joined: Jan 28, 2013 Posts: 19 Location: California
Posted: Sat Feb 16, 2013 2:50 pm Post subject: M38a1fuel pump question
M38a1 Fuel pump issue
I am installing a fuel pump on my M38a1 and the left bolt hole in the engine block has been drilled and tapped for a 3/8 inch bolt, but is only threaded for about 1/4 to 3/16 inch (and not well done either). I would like to tap it a bit deeper into the engine block but cannot tell if the hole goes through to the internal part of the engine (engine is in vehicle). I have probed the hole with a wire and it does not seem to go through - the wire goes in close to one inch depth. Does anyone know if the left hole is a dead end (bottom tap) or if it goes through? I really don't want to get metal shavings inside the engine.
The front hole is blind and is only 3/4" deep. I would guess the threaded length in the hole is 1/2" to 7/16". Are you using the correct long hex head special bolts and the correct spacer?
Then be sure to limit the length of your mount bolts to penetrate the block no more than 1/2". You do not use the M series vacuum/fuel pump spacer with the civvy single action pump. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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