BronsonA2150 Posted Monday at 02:22 PM Share Posted Monday at 02:22 PM I have a 94 ch613. Someone has gotten rid of the muffler and the pipe doesn’t sit straight. I’m thinking this long piece of flex pipe isn’t correct. Does anyone have pictures of what it actually needs or a parts breakdown from dealer? Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/ Share on other sites More sharing options...
Joseph Cummings Posted Monday at 02:38 PM Share Posted Monday at 02:38 PM Way too much flex. If I remember correctly, you are only allowed 18 inches 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567837 Share on other sites More sharing options...
tjc transport Posted Monday at 02:38 PM Share Posted Monday at 02:38 PM i would put a 90 degree elbow on bottom of the stack, and let the flex run straight from turbo outlet pipe to elbow. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567838 Share on other sites More sharing options...
67RModel Posted Monday at 03:09 PM Share Posted Monday at 03:09 PM I would start by putting a muffler back on. Make the 90 degree bend with an elbow fitting. Connet the elbow fitting to the flex pipe under the bunk. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567846 Share on other sites More sharing options...
BronsonA2150 Posted Monday at 03:50 PM Author Share Posted Monday at 03:50 PM 40 minutes ago, 67RModel said: I would start by putting a muffler back on. Make the 90 degree bend with an elbow fitting. Connet the elbow fitting to the flex pipe under the bunk. Negative on that one. Guessing a muffler isn’t cheap. Just wanting to clean the bend up. Plus it sounds good 😎 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567859 Share on other sites More sharing options...
BronsonA2150 Posted Monday at 03:53 PM Author Share Posted Monday at 03:53 PM I guess I’m mostly wanting to know if there are any factor brackets or shields missing to put a 90 on it. It’s awfully close to that air bag like it is also so don’t know if there was another elbow to get it away from that Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567860 Share on other sites More sharing options...
mechohaulic Posted Monday at 05:04 PM Share Posted Monday at 05:04 PM looks of the black on flex ; there's tooo much tension on the bend , also this is a project not to be put off too long. no muffler going on then do a "build as you go" .. basically idea up what you want then go to a supplier for parts available .to close to air bag - since it appear brackets have been welded on stand pipe = cut them off install new brackets which would bring exhaust out further, as been mentioned ; flex off turbo pipe HD 90 connecting to longer stack. Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567862 Share on other sites More sharing options...
Joey Mack Posted Monday at 05:29 PM Share Posted Monday at 05:29 PM The little tab for where muffler sits has been cut off the stantion. It needs to be put back. The under cab pipe comes to the back of the cab, there is an elbow on the bottom of the muffler, and a 14"-18" flex that joins the elbow to the under cab pipe. There is also a bracket under the cab to out a ubolt through to secure the hard pipe.. the piping is 5" o.d. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567863 Share on other sites More sharing options...
BronsonA2150 Posted Monday at 06:44 PM Author Share Posted Monday at 06:44 PM 1 hour ago, Joey Mack said: The little tab for where muffler sits has been cut off the stantion. It needs to be put back. The under cab pipe comes to the back of the cab, there is an elbow on the bottom of the muffler, and a 14"-18" flex that joins the elbow to the under cab pipe. There is also a bracket under the cab to out a ubolt through to secure the hard pipe.. the piping is 5" o.d. That’s what I wondered. Would a dealer have a parts breakdown of where and what all that is? Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567877 Share on other sites More sharing options...
Joey Mack Posted Monday at 06:50 PM Share Posted Monday at 06:50 PM The pipe under the cab, the elbow and the length of flex. As far as tab location goes, look near the top of the station for the upper bracket welded to it, the measure down and mark the station at the length of a standard straight through muffler body. Then weld a 3/4"x3/4" peice of angle iron on it so its like a little shelf to set the muffler on when mounted. I see the bolt holes for the big muffler clamps are still in the stantion? Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567879 Share on other sites More sharing options...
The Heinz Posted Monday at 09:33 PM Share Posted Monday at 09:33 PM Yes, a dealer should be able to give you a diagram of the exhaust piping on your truck. The only VIN I have saved for a CHU of similar age is a '97 with dual stacks, see below. Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567908 Share on other sites More sharing options...
Joey Mack Posted Monday at 09:36 PM Share Posted Monday at 09:36 PM Ch-613/10700.... 2001 i think.. its one i used to service.. try yhis one Heinzy His is a '94 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567909 Share on other sites More sharing options...
The Heinz Posted Monday at 10:16 PM Share Posted Monday at 10:16 PM 1990 CH613 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567911 Share on other sites More sharing options...
Joey Mack Posted Monday at 10:35 PM Share Posted Monday at 10:35 PM He will need 2 of #17,,,, 1- #23,,,,,, 1- #26,,,, is this a day cab or sleeper vin ? Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567912 Share on other sites More sharing options...
Joey Mack Posted Monday at 10:36 PM Share Posted Monday at 10:36 PM Heinzy, are you are the night shift ? Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567913 Share on other sites More sharing options...
The Heinz Posted Monday at 10:46 PM Share Posted Monday at 10:46 PM I call it a late first shift, I'll be clocking out shortly. The pictures were for a daycab. Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567914 Share on other sites More sharing options...
Joey Mack Posted Monday at 10:47 PM Share Posted Monday at 10:47 PM His is a sleeper... Dude, i dont know why im posting for him.. sorry . I stop now.. 😜 Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567915 Share on other sites More sharing options...
harrybarbon Posted Tuesday at 08:05 AM Share Posted Tuesday at 08:05 AM This picture may help you. Exhaust of an Aussie Valueliner, similar exhaust post to your Mack. This was the original exhaust from factory, no muffler. Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567938 Share on other sites More sharing options...
harrybarbon Posted Tuesday at 08:05 AM Share Posted Tuesday at 08:05 AM This picture may help you. Exhaust of an Aussie Valueliner, similar exhaust post to your Mack. This was the original exhaust from factory, no muffler. Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567939 Share on other sites More sharing options...
BronsonA2150 Posted Tuesday at 03:11 PM Author Share Posted Tuesday at 03:11 PM 7 hours ago, harrybarbon said: This picture may help you. Exhaust of an Aussie Valueliner, similar exhaust post to your Mack. This was the original exhaust from factory, no muffler. Looks a little blurry zooming in on the bottom of it to see the elbows Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-567969 Share on other sites More sharing options...
harrybarbon Posted 1 hour ago Share Posted 1 hour ago this picture is a better - zoom in. It is a solid pipe that comes up from under the frame. Quote Link to comment https://www.bigmacktrucks.com/topic/75073-correct-exhaust-elbows/#findComment-568111 Share on other sites More sharing options...
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