Hello group,
Thought I might get a new topic going. There has not been much discussion on exhaust installations.
A poorly installed exhaust can create vibrations, rattles, exhaust noises and fumes. In addition it may hang visibly too low and may cause the exhaust tail pipes to be positioned incorrectly. In severe circumstances the expensive exhaust manifolds can also be damaged by a poorly installed system. A correctly installed exhaust can make a world of different in the driveability a feel of the car. The original chrome tailpipe ends are chrome plated brass and are hard to salvage for re-use. Some formed sheetmetal hanger parts are separate parts which may need to be ordered, depending on their condition. Do not cut corners on replacing the inexpensive rubber mount parts with new. Replacement of the front pipe to manifold seals and bolts is also inexpensive and worthwhile.
It might be nice to compile a complete list with part numbers for all these little goodies. Everyone will need this information sooner or latter.
Installation;
The condition of the motor mounts may effect the position a little. Most fit up problems are caused by improper installation. If a
platform lift is not available, the job can be done on jack stands. When I install a new exhaust on a 113 I first jack up the car, then place four jack stands under the suspension so the suspension is loaded. I position all exhaust parts, in the exact position, before welding. I bolt and tighten up the front pipes, hang both mufflers with all the rubber hangers, and temporarily fit all the parts in place using more jack stands to keep everything from sagging. Once everything is in it's exact place, I check around all the pipes and mufflers to make sure there is enough clearance so nothing will rub or rattle after installation. I also make sure the system is up in place and not positioned too low. Make sure the position of the two tail pipes are level and in proper position at the rear of the car. Finally I spot-weld all the connections while in position. I then loosen the entire system low enough to finish running solid welds around every pipe. After finishing the welding the entire system is once again installed. Clamps can be used at the front pipe connection, however use of additional clamps will probably cause the system to sag and/or rattle eventually. Make sure all exhaust supports are attached correctly. This is a lot of work but it will give you a solid rattle free exhaust system which will not sag out of position. Good luck.
Joe Alexander
Blacklick, Ohio
