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Exhaust mounting bracket quiery

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chicken

chicken

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I am fitting a new exhaust from AH spares, i have the two brackets screwed to the chasis that hold the tail pipe but am at a loss as to where the 3rd bracket is fitted that holds the front of the silencer box, should it be bolted up through the floor pan as there are no clear holes in the chasis for it to mount to.

Rob
 
Hi Rob,

Yes, on the BJ7 anyway, the front mount bolts to the floor just aft of the sill outrigger. If I recall correctly, this mount has a tab (with weld nut) that is vertical which the front bracket on the muffler is bolted to.

Cheers,
John
 
Hi Rob, if the floor pans have been replaced you'll have to drill new holes to accept the bolts. I would suggest you take care here to not have to drill twice. Mount the rubber bracket to the muffler then raise up to the floor pan and mark where the holes need to go.

BTW I always drill a hole through the rubber bracket and insert a "furniture bolt" from the back to the front and secure with nyloc nut. The rubber tends to separate from the metal bracket and will let go after a short while. Go to any good hardware store and ask for furniture bolts, you'll see what I mean.
 
Although I am not currently looking at the exhaust system on my BJ8, as I recall the rubber mounting brackets seem to be designed to break away so that the exhaust system literally falls off in the event of seriously bottoming out. If you defeat that with furniture bolts, are you not taking a chance of more significant damage to the exhaust and under side of the car in the event of bottoming out.
 
Actually Shorn I think it is the opposite. The rubber buffer merely rebounds with movement to prevent the tailpipe/muffler from striking the bottom of the car. Although the bolts do restrict that somewhat, there still seems to be sufficent movement to do the job. Too often I've had to stop and "tie up" the tailpipe to keep it from dragging.
 
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