Freightrain Posted Tuesday at 11:44 AM Share Posted Tuesday at 11:44 AM Ok, I need some assistance getting the proper part number for the exhaust clamp on my 300. It is 4 7/16" diameter flange. Mack turbo 631GC5134P4X. Dealership are pretty worthless so I haven't even tried there. I googled V band clamps but couldn't come up with a chart of sizes. Of course the input side is a different size so I can't go off of that. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/ Share on other sites More sharing options...
Geoff Weeks Posted Tuesday at 01:14 PM Share Posted Tuesday at 01:14 PM (edited) Sounds like you need a 4.5" Marmon clamp. Have you tried Grand Rock or other exh supplier? Edit Marman is the correct spelling. Edited Tuesday at 01:17 PM by Geoff Weeks spelling Quote Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/#findComment-594514 Share on other sites More sharing options...
Freightrain Posted Tuesday at 05:47 PM Author Share Posted Tuesday at 05:47 PM I've seen both Marmon and Marman listed. More then one person has a spelling for it. I found a 4.5" clamp but from the runaround I went through on the 237 exhaust clamp 10 yrs ago, there are different widths of taper?? Not universal one size fits all. Or is it?? I went through this with Tip turbine clamp. Found manufacturer but they don't make clamps anymore. The clamp on the intake side of turbo has R.G. Ray on it. Lots of variations. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/#findComment-594520 Share on other sites More sharing options...
The Heinz Posted 18 hours ago Share Posted 18 hours ago (edited) I sent the part number to my buddy at the dealership, maybe he can find the number for you. No luck, maybe with a VIN but the old Mack support has left with me... Edited 18 hours ago by The Heinz 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/#findComment-594602 Share on other sites More sharing options...
Freightrain Posted 8 hours ago Author Share Posted 8 hours ago I don't have a VIN to work with, that's my problem. When I installed the 237 someone here gave me a VIN and that helped with working on it. I need a VIN from a 300+ truck. I have a VIN when I ordered the steering box but not sure that was a 300+ truck. Or how generic is the exhaust clamp between motors? It is smaller then the 237 clamp but it had a cast downpipe that isn't on this engine. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/#findComment-594613 Share on other sites More sharing options...
The Heinz Posted 8 hours ago Share Posted 8 hours ago My 80+ VIN list strikes again! Try old number 48RU2341, new number 25152307. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/#findComment-594614 Share on other sites More sharing options...
Freightrain Posted 4 hours ago Author Share Posted 4 hours ago Thanks. I asked another Mack guy and he said my 237 clamp should fit. But, mine was from a fire engine(I think) and has a cast iron downpipe that slips into the turbo. I don't think it is the same as a typical truck outlet like on the 300. It has a band clamp down below picture. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/76570-turbo-exhaust-clamp/#findComment-594623 Share on other sites More sharing options...
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