Full Auto inlet valve seals
- Thread starter SteveA
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Fullauto
What are the differences of your guides/seals as opposed to stock parts and the improvements you have made.
Valve seals for exhaust guides? Steve I know.it is an edit on the post after this one by Dk 26 as in what! I'm in enough bother as it is, old chap. So the more eloquent in the forum , like your good self may explain any oversights made. Well there you,I'm not often right, but I'm wrong again!but I'm not fitting then to my bikes
Only asking.
Cheers
What are the differences of your guides/seals as opposed to stock parts and the improvements you have made.
Valve seals for exhaust guides? Steve I know.it is an edit on the post after this one by Dk 26 as in what! I'm in enough bother as it is, old chap. So the more eloquent in the forum , like your good self may explain any oversights made. Well there you,I'm not often right, but I'm wrong again!but I'm not fitting then to my bikes
Only asking.
Cheers
SteveA
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Fellas......
Think about it, the groove in the exhaust valve for a seal is just redundant.....no real point in stocking two guides just to delete the groove. Just don't fit a seal.
You don't fit seals on exhaust guides for two reasons.
One, the heat generated would mean they would have a very short life.
But more importantly, they are just not needed.
You need a seal on the inlet because of the specific conditions when a very high vacuum pressure exists in the inlet tract.
This happens in particular on the overun with a closed throttle. In this state oil is drawn down the inlet guide due to the negative pressure. The oil is then drawn into the combustion chamber and it gets 'combusted'.
This why you get puffs of burnt oil smoke as you change down the box when your seals are damaged/worn/hardened, or where you have excessive valve guide wear.
This does not happen in the exhaust. No seal needed or fitted.
Think about it, the groove in the exhaust valve for a seal is just redundant.....no real point in stocking two guides just to delete the groove. Just don't fit a seal.
You don't fit seals on exhaust guides for two reasons.
One, the heat generated would mean they would have a very short life.
But more importantly, they are just not needed.
You need a seal on the inlet because of the specific conditions when a very high vacuum pressure exists in the inlet tract.
This happens in particular on the overun with a closed throttle. In this state oil is drawn down the inlet guide due to the negative pressure. The oil is then drawn into the combustion chamber and it gets 'combusted'.
This why you get puffs of burnt oil smoke as you change down the box when your seals are damaged/worn/hardened, or where you have excessive valve guide wear.
This does not happen in the exhaust. No seal needed or fitted.
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Total seal piston ring instructions for the Norton Piston Rings say to put seals on the exhaust valves.
I did install the seals on my exhaust valves and have not had any problems.
As far as I can tell I have also had zero oil consumption on my 850.
Mostly running supercharged.
I did install the seals on my exhaust valves and have not had any problems.
As far as I can tell I have also had zero oil consumption on my 850.
Mostly running supercharged.
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1. Intact exht. valve sealing-seating should never allow any chamber 'vacuum' to reach those guides to pull oil in thus exht quides only see hi pressure exhaust blast out on opening so no seals needed.
2. Boosted engines never get below ambient pressure so always some pressure in chambers so again no seals needed on intakes either.
3. Closed throttle roll down still has exht valves closed for the piston draw down so any guide leak smoke is from intakes guides only.
4. If ext seats leaks then must fix them not try to fit guide seals to melt apart.
? what intake seals are used with K/W 6 mm valve stems?
2. Boosted engines never get below ambient pressure so always some pressure in chambers so again no seals needed on intakes either.
3. Closed throttle roll down still has exht valves closed for the piston draw down so any guide leak smoke is from intakes guides only.
4. If ext seats leaks then must fix them not try to fit guide seals to melt apart.
? what intake seals are used with K/W 6 mm valve stems?
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Ugh StevieA - that's so like what my wife responses are when I ask for some simple specifics she knows and I don't. Dreer provided Peel's current 6mm stem seals so I've some time to find out what ya don't seem to know or care. Hope ya guys figure out why fitting exht seals is so troublesome on about any engine.
lcrken
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Actually, SteveA's answer is correct. You need to call KPM to order the seals. The part number is 700-100019. They sell them individually or in packs of 10.
If you want to try to find a replacement from an automotive supply house, look for a seal that fits 7 mm valve stem and a 0.475" valve guide diameter. Overall length of this one is .430".
Ken
If you want to try to find a replacement from an automotive supply house, look for a seal that fits 7 mm valve stem and a 0.475" valve guide diameter. Overall length of this one is .430".
Ken
lcrken
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OOPS!
Disregard that Steve (hobot). The info I gave is for the 7 mm stem conversion. I don't know anything about a 6 mm conversion. I'll take a look at Peel's head and see what size the guide is. I can probably get the part number for the seals from KPM with that info.
Ken
Disregard that Steve (hobot). The info I gave is for the 7 mm stem conversion. I don't know anything about a 6 mm conversion. I'll take a look at Peel's head and see what size the guide is. I can probably get the part number for the seals from KPM with that info.
Ken
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Ok Ken I didn't know if K/W sold valve seals. Peel's 6mm valve kit was from Kenny Dreer and thought its seals were still good to go, so mainly future needs I'm seeking. K/W has Dreer's kit specific parts numbers to simplify orders.
If ya didn't find anything obvious wrong with Peels Combat head then its been proven totally bullet proof beyond everything else in her weaker but more expensive non Norton engine upgrade items.
If ya didn't find anything obvious wrong with Peels Combat head then its been proven totally bullet proof beyond everything else in her weaker but more expensive non Norton engine upgrade items.
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