I just had the head off of my 1296 redone and the machinist found some seals
to fit. They are the large umbrella type. They fit tight over the stem and
he said they are made to move up and down with the valve and shed the oil
away like and umbrella. The outer diameter of the *umbrella* is somewhat
larger than the guide but still fits inside the spring. They don't fit over
and positively lock down on the guide. I can see how a bit of oil could
splash under them and get to the guide but anything running down from the
rockers or the top of the valve stem will be shed off to the sides. I have
no idea what they were originally made to fit.
MikeC
>> Hi All,
>>
>> Have any of you had any experience with the valve stem seals that John
>> Kipping sells to be retro-fitted to control oil loss? I've tried them
>> before with no luck and have now purchased a recon. unleaded cylinder
head
>> from him that has them fitted. Trouble is they don't seem to fit
properly.
>> They had all popped off long before I'd got the head home let alone
fitted
>> it and started the engine. You push them on but they just slide right
back
>> off again. I returned the head to Kippings and they replaced it with
>> another which had the stem seals bonded to the guides with locktite.
After
>> just 50 miles of driving most of these stem seals had disintegrated. I'm
>> pretty hacked-off with this because it turns out that the "reconditioned
>> heads" that John Kipping sells so cheaply (£165) don't have new valve
>> guides. They rely on these crappy seals which don't fit properly.
>> Is it possible for me to replace the valve guides without having to
>> re-machine the valve seats on this new re-con head? Is it something I can
do
>> at home or do you need a press etc? I'd be grateful for any advice on
this.
>>
>> Cheers,
>>
>> Jonathan
>>
>> '77 Spit 1500
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