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Mod | | | Forums66 Topics128,164 Posts1,056,975 Members48,458 | | 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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| | | | Joined: Sep 2004 Posts: 24 New Guy | | New Guy Joined: Sep 2004 Posts: 24 | what is the 1/4" pipe tapped hole for on a 235 . it is on the drivers side at bottom of block near the firewall? I have the oil filter lines screwed in near the center of the block on the drivers side. should this be plugged or is it the oil temp gauge hole? Thanks in advance, MJ. | | | | | Joined: Jun 2012 Posts: 1,749 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,749 | There is no oil temp sensor on these old engines. What you have is the drain for the coolant at the back of the block. Put a valve on there and you can flush the block when you flush the cooling system.
Steve H
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