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Jul 21st, 2025 | | | | Joined: Jan 2011 Posts: 305 'Bolter | | 'Bolter Joined: Jan 2011 Posts: 305 | there are only 4 right?
two in front two in back.
can I just use half inch pipe plugs? or are they 7/16th?
thanks
rolf
1963 c10
| | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 |
You might want to post photos and mention the year of the 261.
From 58-63 there is are two 1/2" NPT holes/plug on the driver's side. There is a movable plug inside the rearward hole that diverts full-flow oil out that hole. If that plug is moved to divert oil out the 1/2" NPT hole, that hole in the block should not be plugged.
| | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | If the diverter plug is driven in, the engine is set up for a full-flow oil filter and the proper filter MUST be used. It flows all the oil passing from the oil pump to the bearings, and if the passage is plugged the engine will die from lack of lubrication. It would be possible to put a 1/2" inside diameter connector hose suitable for engine oil from one port to the other if you prefer not to run a filter. If the diverter plug is in the "out" position, a regular bypass filter can be run, or the ports can be blocked off with 1/2" NPT plugs.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Jan 2011 Posts: 305 'Bolter | | 'Bolter Joined: Jan 2011 Posts: 305 | the engine is a 59-62 last four of the casting # is 9925
it's a brand new block never been built.
the plugs i'm asking about are the ones at the front and rear of the oil galleys.
the ones on the side I assumed are for the external oil filter lines which I plan to install
the 54 truck manual mentions the plugs one the ends of the block but doesn't say how many.
the obvious ones are at the ends of the galley's on both sides I just don't want to miss one.
thanks guys
rolf
1963 c10
| | | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | http://www.stovebolt.com/techtips/engines/oil%20filters/index.html This may help. Go to installation instructions,and it will illustrate,(by,(filter), model number,year, which fittings to use,and the correct procedure to install the filter brackets,lines and the filters themselves.
Last edited by wetwilly5757; 09/10/2014 5:51 AM.
| | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 |
Rolf does say he intends to use an oil filter. If he has a 58-63 261 which has 1/2" NPT threaded holes for a full-flow oil filtration system, the Tech Tech will be of little or no use.
The Tech Tip is about by-pass oil filtration assemblies. The original 58-63 261 truck full-flow filter assembly is significantly different AND the direction of oil flow is different (the direction/orientation of oil flow in and out of the block).
| | | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | I missed that. All I saw was oil galley plugs,and a brand new block.External oil filter lines,like used on remote filters,as well,like on my friend's 59 Viking 60.-Sorry.
Last edited by wetwilly5757; 09/11/2014 1:32 AM.
| | | | | Joined: Mar 2010 Posts: 10,059 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,059 | Gallery. Unless your truck floats and has a kitchen in it. (see pet peeves in Greasy Spoon Forum). I am also annoyed by know-it-all smarty-pants. 
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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