hi all i am having a bit of a problem burning out the no 4 exaust valve this is the 3rd this year now i know there is other problems with the motor as in the rings are on there way out hence going through about 1 litre of oil every 100km i know it does need a rebuild but finances wont allow me the pleasure at the moment and i need to keep this car on the road for a little while longer at least

any ideas are greatfuly accepted

Peter.

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A almost Bog Stock 1977 LS
1969 morris mini panel van, a work in progress

My thoughts.

Burnt oil = carbon
carbon under valve = burnt out valve

perhaps #4 is the worst burning and hence creating the most carbon

If I am right the only way to "fix" it is to rebuild properly.

Steve

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1964 998cc Cooper
1971 Mini K x 2
1972 Clubman GT

Fix valve, then decoke every few weeks using the water trick to prevent such a carbon buildup.

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Too many cars, and too little time.

no problem the rebuild i think will be the only fix unfortuantly im going to have to patch it up till i get another car which hopfully will be in a fortnight till then i can just hope it will get me to work and back

peter.

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A almost Bog Stock 1977 LS
1969 morris mini panel van, a work in progress

What is the water trick? Is that spraying water into the carb throat with engine running?

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Copper 4 lyfe!

yep, but in small amounts i.e. a spray bottle, not a garden hose.

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Too many cars, and too little time.

Yeah but if he used the garden hose he would not have to worry about a burn't valve, just broken &/or bent everything else

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I just did some googling and found this page which described a mechanic hooking up a hose to the vacuum port with the other end in a bottle of water Hmm I might try that actually, with a hose clamp to control the rate. That'll allow me to do this trick without an assistant ^_^

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Copper 4 lyfe!