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Exhaust Systems for Series Land Rovers

The exhaust illustrated above is that for a LWB Series IIA station wagon. This exhaust is becoming increasingly hard to find. The silencer box section is in common with some SWB Series Land Rover models and is readily obtained. However, these other models do not have the specifically (and critically) shaped long tailpipe Even more of a problem is that the mounting bracket welded to the side of the silencer (see photo) is also absent in the SWB applications. The precise location of this bracket on the silencer is critical to the correct hanging of the exhaust on the LWB station wagon, else it knocks against the chassis.

When it comes to removing the exhaust system the bolts connecting sections together will probably be seized up. A dose a WD40 or similar may free them with time but otherwise it might just be easier to cut them off and replace with new ones.

It is important for an exhaust system to have gas tight seals at each junction as, apart from not meeting exhaust emission regulations, engine power is reduced. The closer the joint is to the engine block the more important the effectiveness of the gas seal is. To achieve a good seal an exhaust joint sealing compound should be used. It is easy to apply and hardens once the exhaust is heated up. It also has the benefit of allowing the joint faces easier movement during assembly.

The longer an exhaust system is, the more likely it is to suffer fracture, as the Land Rover flexs over rough terrain or is subject to the rapid vibration caused by road corrugations. To ensure this doesn't happen then stresses should not be introduced into the system when it is assembled. Make sure that all flexible bubber mountings are fully operational and can actually allow the system to move a little relative to the chassis. Also, when fitting the exhaust, assemble all the sections in situ without tightening the bolts. Only when all sections are in location should the various sections be tightened relative to each other.

If you need to temporaily patch up a hole in an exhaust with exhaust putty or bandage, a useful tip is to reinforce the damaged area with wire mesh before applying it.


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