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Mod | | | Forums66 Topics128,137 Posts1,056,747 Members48,454 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Nov 2001 Posts: 275 Shop Shark | | Shop Shark Joined: Nov 2001 Posts: 275 | Finished tearing into the 235 today and found masacred main rod bearing so rather than going any further with that motor, I'm replacing it with the 261.
However, a burning question--how do you replace the oil pump if necessary? These two motors, as well as the 261 in my '56 all have two mounting bolts with round heads and no visible means of removing them. Are they not meant to be removed? Is there a repair kit available to repair them in place or? Note: The pick-up screen in the 261 is majorly clogged with gunk. | | | | | Joined: Jun 2005 Posts: 388 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 388 | Those two "bolts" with the round heads do not get removed there is a large set screw and locknut inside the crankcase that holds the oil pump in position. Look at page 6-14 Shop manual. The set screw must not be over-tightened when installing the replacement pump. Hope this helps. Hoyt | | | | | Joined: Nov 2001 Posts: 275 Shop Shark | | Shop Shark Joined: Nov 2001 Posts: 275 | Thanks to both of you. As usual, Stovebolters rule! | | |
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