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| | | | Joined: Mar 2013 Posts: 221 'Bolter | | 'Bolter Joined: Mar 2013 Posts: 221 | I was assuming the slinger went on AFTER the gear and cupped towards the front of the engine. It wont fit that way! I have a Thickstun timing cover and the slinger is hitting the cover on the inside. SO HOW DOES IT GO? It can't fit cupped towards the gear. I have a General Motors GMC truck manual, BUT it says nothing about the slinger. Its possible that it might not be a part of this engine, as it was a basket job. Could the slinger be from something else????
Jay D.
Last edited by jay d; 06/30/2026 11:49 PM. Reason: ADDITION
| | | | | Joined: May 2015 Posts: 11,086 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 11,086 | Jay, Let us know what engine you're working on. That would help the guys answer your question.
If you go to your profile and add your truck info in a signature, you wouldn't have to type it in when you post.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Mar 2013 Posts: 221 'Bolter | | 'Bolter Joined: Mar 2013 Posts: 221 | Jay, Let us know what engine you're working on. That would help the guys answer your question.
If you go to your profile and add your truck info in a signature, you wouldn't have to type it in when you post. Thanks, I corrected the post. | | | | | Joined: Sep 2009 Posts: 5,956 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,956 | jay d - I just leafed through the engine section (8) of a 1955 GMC Models 100-500 Shop manual. I see nothing related to a "crankshaft oil slinger" in the instructions or diagrams.
Post a picture of your "slinger" so we can further consider what it may really be please.
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Jan 2022 Posts: 2,472 'Bolter | | 'Bolter Joined: Jan 2022 Posts: 2,472 | None of the 4 GMC Master Parts Books (covering 1939-1960) that I have show an oil slinger at the front end of the crankshaft of any 228, 236,248,256,270 or 302 GMC inline 6. My 302 doesn't have one.
There is an oil slinger at the rear of the crankshaft between rear main bearing and the rear main seal. The cavity that the slinger rides in has a drain hole in the bottom. This slinger is not removable from the crankshaft. It is machined from the raw crankshaft casting.
Either the slinger you are worried about is a part specific to the Thickstun timing cover you have or one of your buddies dropped a slinger from some other engine in amongst your GMC parts as a prank.
Last edited by Bill Hanlon; 07/01/2026 1:17 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| | | | | Joined: Mar 2013 Posts: 221 'Bolter | | 'Bolter Joined: Mar 2013 Posts: 221 | THANKS, i think it came from another engine. as i said this engine was a basket case completely apart and could have been a mixture of who knows!
Jay D. | | | | | Joined: Feb 2004 Posts: 29,826 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,826 | Since you're going to need a spacer between the timing gear and the balancer you're planning to use, a little bit of creative metal butchery on a lathe could create a slinger, if you want to go to the trouble to make one.
Jerry
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