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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 2011 Posts: 290 'Bolter | | 'Bolter Joined: Jun 2011 Posts: 290 | I just installed my rebuilt 59 235 engine back in my truck. I cranked it up and started running it at a mid RPM break-in period as requested by my engine builder. Afterwards, I noticed an exhaust leak on the side of my exhaust at the moving warm up mechanism/device (I don't know what it is called but it helps send heat back to the engine for warm-up). I am wondering if I can eliminate that device or leave it in place and seal off both ends to stop my exhaust leak? It is leaking on the side with the large counterbalance weight device. Leaking where the stem passes through the manifold. Any suggestions would be appreciated!! | | | | | Joined: Feb 2000 Posts: 5,191 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,191 | You are referring to the heat riser, it's best to keep it, they help in cool damp climates.
If you are mechanically inclined, you can take the flap out, with some work, and put tight fitting bushing in the manifold to help seal the leaks. The flap is welded on the shaft and requires some grinding, it would also will require some welding to put it back. It's about as much work to take it out and plug the holes as it is to fix the holes and repair it for good. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Bronze/brass bushings are available in common sizes. Definitely fix to operate as designed.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Here is another option - if your pivot holes are not too wallowed out? | | | | | Joined: Jan 2010 Posts: 4,263 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 4,263 | Some good pics on dennys site ...link... Shows where the shaft is spot welded ...pic... | | |
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