horace
Thrash Merchant
Posts: 456
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Post by horace on Sept 24, 2012 19:35:44 GMT 1
My valves have been leaking oil between the barrels ,so decided to strip the top end to see if I could see the problem,the bushes don't look in very good condition so will replace them and the orange seals,but am wondering if the power valves need changing as well,they feel a little slack on the bushes but don't feel to bad with the seal on,does the stem on the valve wear down,valves have cleaned up good otherwise,cheers.
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Post by Shytalk on Sept 25, 2012 11:38:46 GMT 1
Yes the stems can wear on the valves and many have, I would go with new bushes and seals first to see if that improves it, sometimes just the bushes wear, they aren't cheap mind you. A new set of valves, bushes and seals is well over £200 if you don't already know  |
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horace
Thrash Merchant
Posts: 456
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Post by horace on Sept 25, 2012 20:07:43 GMT 1
Thanks for that lads thought that might be the case ,didn't want to rebuilb the top end really if it could be the valves as well ,seems like a waste of time but put against the extra experience of the new valves could be well worth the effort ,does anyone no the new valve stem measurements ,could have a look at that 1st?
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Post by bare on Sept 26, 2012 18:47:30 GMT 1
Unless the valves are Damaged.
It's imo "clever' to have the Bearing ends of the Valves fitted with heat shrunk on steel tubes then turned to 'properly' fit the bushes. Resulting in a MUCH better than oem permanent improvement/repair.
Why spend the same or more money on fresh valves with their fragile ali shafts?
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Post by Shytalk on Sept 26, 2012 19:16:24 GMT 1
does anyone no the new valve stem measurements ,could have a look at that 1st? I have measured a NOS set and they come out at 17.17mm - 17.2mm. The small end cap stem is smaller at 16.95mm but I assume that they should all be the same. |
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Post by midlifecrisisrd on Sept 27, 2012 12:22:09 GMT 1
does anyone no the new valve stem measurements ,could have a look at that 1st? I have measured a NOS set and they come out at 17.17mm - 17.2mm. The small end cap stem is smaller at 16.95mm but I assume that they should all be the same. I remember TSS commenting on the bushes and that they were slightly different. Might be to do with different expansion rates of the blank end cap and the open bushes. Steve |
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Post by bare on Sept 29, 2012 0:32:22 GMT 1
Perhaps... But TSS' "steve' has proven hisself to be a Complete t**t .
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