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Series Land Rover Leaking Exhaust Problems

The standard engines in Series Land Rovers are all under-powered by modern standards and so any loss of power from whatever cause needs to be rectified as soon as possible. One such cause of power loss can be loss of compression in the exhaust system. The nearer to the engine that the leaking occurs then the more effect it has on engine performance.

It's important to remember that exhaust fumes are extremely poisonous and that the most poisonous component (carbon monoxide) has no smell - so exhaust leaks should not be examined in a poorly ventilated garage.

A common location for the leaking is from the exhaust manifold - either where it joins with the cylinder head via a gasket, or at the joint with the downward exhaust pipe. Leaks at these places can be tested for with any feather substitute. It may be necessary to carefully shield the draught from the radiator fan whilst searching for an exahust gas leak.

Having found a leak, then the problem becomes one of sealing it. Quite often this will involve the dismantling of an exhaust system joint and you will either have to cut through the fixing bolts or soak them with penetrating oil
prior to dismantling. It is also important to loosen exhaust pipe mounting points either side of the joint to be repaired so as not to introduce stress into the system when the joint is re-assembled. The joint surfaces should be cleaned and then high temperature exhaust sealing compound used on the surfaces before re-assembling the joint and re-tightening the other mountings.

Sometimes a leak is due to a hole in a corroded part of the exhaust pipe. The permanent solution of course is to replace the damaged section of pipe, but commercial exhaust repair bandage should make a good temporary repair. If repair bandage is not available then a temporary but imperfect fix, can often be achieved with a thin metal patch (drinks can thickness) wired into place over the damage.

A worse case scenario is if you have a broken or detached exhaust pipe. A detached pipe can be held up with wire; obtained from any source possible - but electrical wire needs to have the plastic covering stripped off and several wrap arounds will be needed. For a broken pipe, treat it as you would a broken limb and splint it - but NOT with wood. Use spanners or any available long thin metal items.



Previous homepages devoted to the exhaust system were February 2009 , September 2009 and March 2011

(To see other previous homepages visit the Homepage Archives link)

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Fascinating facts
(No.127)

Standard 5-bearing petrol and diesel engines were both painted terra-cotta red.




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