Header problem?..

JimP · #1 (**permalink**) 06-15-2007, 09:58 AM

I have my 351w installed, T56 transmission installed, header and sidepipes on. Everything fit and went together well on the chassis. However, I cut the openings in the body for the side pipes, put the body on the car and the pipes coming out the drivers side align perfectly in the center of the body cut out but the pipe coming out the passanger side is almost touching the forward edge of the cutout. The pipe is coming out maybe 5/8 to 3/4 of an inch too far forward. I made several measurements to make sure the body was centered on the frame and it it is, it just appears that the header wasn't made properly or is bent? I thought I heard of an issue where some headers were sent out that were not correct, is it possible I got one of those? This is an older kit from around 1996.

dscott · #2 (**permalink**) 06-18-2007, 12:26 PM

As long as the headers and sidepipes fit the car and are not hitting on the fender liners you just need to cut the body to fit the sidepipe. The marks could have been off.
Don

JimP · #3 (**permalink**) 06-18-2007, 12:58 PM

Don,

I measured the marks on the body and they are identical to one another. If I measure the Sidepipe distance from the tire it is off by that amount (closer to the tire) on the passanger side. Also the Header is much closer to the fender liner on that side of the car. I can email Pictures if you want... Just wondering if I should buy a new set of headers?

Jim

dscott · #4 (**permalink**) 06-18-2007, 02:24 PM

Jim, I would try and assemble everything before you spend any money. As long as the header isn't touching anything it should be ok. There was a problem around that time with some headers but it was more in the angle of the base where it bolts to the sidepipe which brought the sidepipe too close on one side and out too far on the other.
Don

Kens67cobra · #5 (**permalink**) 06-18-2007, 05:36 PM

I have a 1992 Classic Roadster (351W) with a vibratiion problem. I just noticed that the passanger side header, where it bolts to the collectors, rests right on the fender liner, it has caused a gouge--- I never noticed it until recently.

(1) can this be causing my vibration only at 2600 to 3000 rpm. ---Vibration is in all gears and neutral with the clutch IN or OUT.

2) What is the fix for the header resting on the fender liner.

dscott · #6 (**permalink**) 06-19-2007, 08:39 AM

Ken, The only thing you can do for the header is cut out the liner and reglass it or put a small metal plate over the hole indented for clearance. The vibration is typically harmonics from the engine. Some vibration is normal and since the sidepipes are solid mounted to the frame you will feel more than normal. If you isolate the rear mounting on the sidepipes that will eliminate most of the vibration feel. If the vibration is harsh then the engine may be out of balance. Sometimes the clutch will cause a vibration and the fix is to rotate the clutch to a different position.
Don