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Jul 21st, 2025 | | | | Joined: Jan 2009 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2009 Posts: 246 | Does anyone know what that window is used for in back of the bell housing ? | | | | | Joined: Aug 2012 Posts: 566 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 566 | well I will take a stab at it if your talking about the somewhat rectangle cover plate I might lead to believe its an inspection plate. Just a guess
"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen 56 Chevy 3100 | | | | | Joined: Jan 2009 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2009 Posts: 246 | Do u know when u install the pressure plate on to the fly wheel is there a certain position that is must be in ? | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | | | | | | Joined: Mar 2010 Posts: 10,059 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,059 | I have often wondered about the practicality of the upper 'inspection plate' myself. In order to use it, you must remove the floor mat, the many rusty sheet metal screws holding down the transmission access cover on the floor, and the screws for the small plate, just to look at what?
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Jul 2012 Posts: 93 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2012 Posts: 93 | probably an easy way to check clutch disc wear (thickness) | | | | | Joined: Jan 2001 Posts: 5,320 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,320 | I think it is just a hold over design from the 1937 and earlier cars and trucks that used carbon throw-out bearings. These bearings had an oil cup that needed access to. Once Chev started a design they were slow to change away from it.
On a similar point, bellhousings all the way up to 1962 are drilled and tapped on the front face for engine mounting brackets that were not used after 1951.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Aug 2000 Posts: 248 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 248 | WE use it for timing the engine.
The Canadian military trucks we restore have a semi cab-over-design and servicing the engine with out removing extensive cab sheet metal has forced us to be creative.
To complicate things the trucks are right hand drive with the clutch on the same side as the timing mark.
Solution is to find the TDC and the best timing for the engine while the cab is not yet installed. Then remove the inspection plate, mark the clutch assembly with a cold chisel and a dab of yellow paint. Next time you need to time the engine it is an easy step to remove the COE engine cover, remove the inspection plate and stretch a piece of wire between the two screws... then use your timing light. You will need an assistant to adjust the dizzy for you.
Phil W. of N. H. came up with that solution, I am only the messenger.
Bob C.
Bob C.
CMP Heaven
The Hammond Barn
| | | | | Joined: Sep 2008 Posts: 872 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 872 | Its much easier to simply drop the clutch cover plate at the bottom of the bell housing (I think that's what its called) if you want to get a peek inside.
My 42 Ford has an inspection cover also... still not easy to get to, but the bell housing solid so its just not a Chevvy/GMC thing. Ford used them too. There is nothing to grease/adjust on the ford, either. | | |
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