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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: Jun 2013 Posts: 52 'Bolter | | 'Bolter Joined: Jun 2013 Posts: 52 | Hello All, I am in need of some help identifying this hole and part after I rebuilt a 55 235. I took this engine to a machine shop and had it vatted bored, etc. Brought it home and put it together painted it and set it aside to finish the truck it was going in. I received a call from the machine shop and was given this small part and was told it came out of the block. Can you help me identify where this part goes in the engine? https://www.dropbox.com/s/colyh6otok5kqvg/IMG_3134.JPG?dl=0Also, take a look at the second picture... there is a hole in my block between the fuel pump and breather tube hole... What goes there? https://www.dropbox.com/s/h76y3ghp9vnjmg6/IMG_3133.JPG?dl=0Thank you for all the help... Dad and Son!
Last edited by DadandSon; 09/01/2014 11:27 PM.
53 3100 purchased brand new by my wife's grandfather... full frame up restore in progress.
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | That is the baffle that is designed to prevent oil from splashing out the road draft tube. And yes it is held to the block by the hole pictured and another behind the road draft tube.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jun 2013 Posts: 52 'Bolter | | 'Bolter Joined: Jun 2013 Posts: 52 | Ok... Do I have to pull the camshaft to put the baffle back in or is there a trick to get to the bottom bolt...
53 3100 purchased brand new by my wife's grandfather... full frame up restore in progress.
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Only the oil pan needs to be off.
The screws go in from the outside. They are sheet metal screws with a lead washer originally. I have had good luck using Nylon washers instead if lead if the lead washers are missing or damaged.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jun 2013 Posts: 52 'Bolter | | 'Bolter Joined: Jun 2013 Posts: 52 | Thank you for the update... I was able to get this back on with your help.
53 3100 purchased brand new by my wife's grandfather... full frame up restore in progress.
| | | | | Joined: Mar 2010 Posts: 10,299 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,299 | Only the oil pan needs to be off.
The screws go in from the outside. They are sheet metal screws with a lead washer originally. I have had good luck using Nylon washers instead if lead if the lead washers are missing or damaged. Hey Dave, do you have any pics or a description of the lead washers? I would like to try to make them. I am weird like that. Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I will get back with pic's as soon as I get time.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I have add a picture of the baffle, screws, and lead washers to my BLOG. The lead washers are .190" ID, .350" OD, .040" - .045" Thick(hard to tell exactly as they are smooshed out from use).
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Mar 2010 Posts: 10,299 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,299 | Thanks Dave. Is smooshed the same as squarshed? Or mashed?  Lead was an interesting choice of materials for a warsher (yes , I say warsher) for this application. I cannot think of anything that would seal in the oil any better. Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | This area of the block is not spot faced so it is ruff from the casting. The lead washer conforms to this ruff area.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | Dave, where can a person buy the lead washers? Thanks Don | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I think 52Carl is going to start making them for us  I know of no new ones. When I can't find good used ones I use Nylon washers.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Feb 2004 Posts: 29,852 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,852 | Melt a wheel weight into a piece of 1/2" stainless steel tubing to make a lead slug, tap it out of the tube with a punch, then center-drill it and slice it off with a hacksaw into whatever thickness washer you need. I could use my lead bullet-casting setup to make some round lead slugs if anyone is interested in acquiring some of these washers.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Aug 2012 Posts: 28 'Bolter | | 'Bolter Joined: Aug 2012 Posts: 28 | Lead sheet & foil is still reasonably available in certain industries. Old school roofers often have some sheet around. If you know anyone in the X-ray or better yet the nuclear medicine / nuclear pharmacy fields they'll have all kinds of it.
Thin Pb sheet is really easy to work with -- can be cut with a utility knife. I think a reasonable washer could be fabricated out of an appropriate thickness of sheet by cutting the OD with scissors or a utility knife and using a cork borer or an office hole punch for the inside hole.
Pete P.
Harborcreek, Penna.
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