My first valve job!

Started by uclabiker06, December 08, 2008, 10:15:47 AM

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Ivan

What doesn't make sense is that your openers and closers were near zero clearance.  Normally, the opener clearances get smaller and the closer clearances get larger.  Ideally, the change in the clearances should track one for one as the valve seats wear.  If I were you, I'd start over....
Sold: 2007 S2R1000 for canyon carving and commuting - DP ECU, PCIII, BMC air filter with open box, Zard full exhaust, Race-tech fork internals, Ohlins steering damper, and a Penske 8987 triple clicker

2000 996XU (extra ugly) for track days - BST carbon wheels, Ohlins shock, reworked fork, FBF exhaust, and a bunch of megacycle rocker arms. The rest of it is junk - Hey, I'm just happy that it runs...

Sold: 2002 Aprilia RST1000 for touring - De-restricted airbox, Taylormade Racing exhaust

uclabiker06

#16
Okay, thanks for the wonderful advice Duck-Stew [evil].  You never cease to impress me with what seems to be an infinite knowledge for these bikes. 

QuoteWhat doesn't make sense is that your openers and  closers were near zero clearance.  Normally, the opener clearances get smaller and the closer clearances get larger.  Ideally, the change in the clearances should track one for one as the valve seats wear.  If I were you, I'd start over....

Yeah, I think I see what you are saying.  Honestly, I don't think I pushed down hard enough on the closing rockers for my initial measurements and perhaps that's why I sanded my closing shims too much.  I plan on measuring the closing clearances again,  but the openers I got taken care of.

However, one thing that concerns me is that when i was trying to move the cams around with the engine turning tool I turned it the direction its not supposed to go.  I did this several time but only for a split second until I heard the weird noise then I stopped.  Did I mess up the "timing" by doing this?
Life is never ours to keep, we borrow it and then we have to give it back.
2006 S2R
2009 Smart

Speeddog

Assuming you were turning the drive pulley, if you turn it backwards (clockwise), the starter sprag backdrives the starter motor and gears, that's the weird noise.

As long as you lined up the dots on the pulleys correctly when you put the belts back on, the cam timing is fine.
- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908


~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

uclabiker06

Got it, thanks for the reply.
Life is never ours to keep, we borrow it and then we have to give it back.
2006 S2R
2009 Smart

Gus Duc

To the OP...... props for diving in & giving it a shot...... more of a man than me [thumbsup]

To Nick & Stu.... I assume you're talking thousnads of an inch correct ???  What does that translate to in MM ???  Looking over the report I got back from my replaced valve guides, the tech stated he set all closers @ .05mm & all openers @ .15mm...... does that sound aboutright ???  I sure hope so because I've been riding the snot out of it for the last 5K  [evil]  If not I guess it's :o:'( @ the 18k service.  I'm also running the MBP collets so I hope they were set right because my understading is these beefier collets help keep the clearences longer.

Speeddog

.05mm = .002"
.15mm = .006"

Those are *alright*.
- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908


~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

Gus Duc


uclabiker06

Yes, Nick I will be seeing you soon as well.

Here are my final measurements:
         ALL Openers at .004 (no tighter)
         Horizontal and Vertical Intake Closers at .002
         Horizontal and Vertical Exhaust Closers at .003

What I found interesting about the intake closers (both) was that when I inserted the feelers I got a reading of .003 with full force on the closing rocker but when I replaced the shims with ones that were .002 larger than the originals they were too tight (binding) so I just counted the both vertical closers as .002 even though the feelers gave me a .003 measurement.  Now I just have to patch things up and hopefully have no smoke coming from the valve seal that got snapped at by the forceps stabilization attempt.  Thanks to all for the help!
Life is never ours to keep, we borrow it and then we have to give it back.
2006 S2R
2009 Smart