HOW TO CHANGE THE RUBBER MOUNTINGS OF A
The rubber mountings that help to prevent engine vibrations from being transmitted to the body shell can actually cause vibration if they are damaged or softened by leaking oil. The weakened rubber allows the engine to rock excessively, and the engine and transmission judders when the clutch is engaged. To change the mountings under the engine or gearbox, a pillar or trolley jack can be used to take the weight while the old mounting is undone. The engine or gearbox is then lifted, the old mounting removed, and a new one inserted.
- Place a jack under the sump. Put a piece of timber at least 1in thick and measuring about 9in x 6in on top of the jack.
- Raise the jack until it just takes the weight of the . The timber will spread the load and prevent damage to the underside of the .
- the nuts or bolts securing the damaged mounting.
- Slowly raise the , watching that the hoses do not over-stretch and that an engine-driven fan does not move dangerously near the . If the hoses show signs of strain, the and them. You can the or fan if it becomes necessary.
- the mounting and insert the new one, putting on the mounting nuts or bolts finger-tight.
- Lower the slowly. When the weight is on the mounting, fully tighten the fixings.
HOW TO FIT A NEW
Worn steady-bar rubbers will allow an to rock excessively, causing judder and putting an unnecessary strain on the exhaust system. The illustrations show how the job is done on a mini.
- the fixing bolt and loosen the cover bracket bolt on the cylinder head.
- Swing the steady bar clear and push the old rubbers from the eye.
- Fit the new rubbers and sleeve by hand. If they are difficult to fit, coating them in washing-up liquid will help them into the eye.
- Fit the center sleeve re-assemble the bracket and fixing bolt and tighten both bolts.
HOW TO CHANGE THE OF AN
If an leaks, usually because a nut or bolt has worked loose exhaust may drift into the . A leak makes a distinct chuffing sound and the hot escaping can be felt with the palm of the hand. Renewing the can stop the problem. Some have their inlet and exhaust manifolds combined, in such ; the air filter must be removed and it may become necessary to disconnect the throttle and the choke controls at the if they are anchored to the manifold. Below are the steps to take in doing that:
- If the manifold has never been removed, put penetrating oil on the fixing bolts or nuts and leave it overnight to into the threads.
- the nuts or bolts securing the manifold using a socket and extension or a box spanner if it becomes necessary.
- Move the manifold away from the cylinder head and extract the old . On a few , the downpipe to the exhaust system will restrict of the manifold. On these, loosen the clamp between manifold and downpipe.
- Scrape off all traces of old material from the manifold and head faces.
- Insert the new , refit the manifold and do up all fixings finger-t0ight. Then tighten them firmly with a spanner or socket, working outwards from the center.
- If the downpipe joint has been loosened, re-tighten the fixings. Reconnect throttle and choke controls, and refit the air cleaner if it has been removed.
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