horizontal cylinder 0 valve clearance - Ducati.ms

gzinga · Sep 23rd, 2009, 11:46 pm

Hi,

so I just hit 7500 miles and I did the big service. Tune up the belts, fluids on so on. Now the exhaust valve on the horizontal cylinder has 0 clearance on opening rocket and like 0.4 on the intake opening. I didn't check the closing since there is very little point at this time. Anybody experienced something like that. I double check and the piston is a TDC. It just seems odd...plus the engine spins find I would think I would have some problem with that....

thanks,

Gabe

GMP · Sep 24th, 2009, 7:34 am

Are you absolutely sure your at TDC on compression stroke?

Sure its possible for the valves to tighten, thats the primary reason for the check. If your at the correct position, and your opener is tight, its time to adjust. Just be sure of what you are doing.

gzinga · Sep 24th, 2009, 9:28 am

that's what I was worried about but the dot and the line align just fine at the crank. After reading the service manual it says you need to press the rocket arm because the spring may put some load..but why would it put any load if it is a TDC

GMP · Sep 24th, 2009, 11:07 am

The closing rocker is depressed to measure the closer clearance directly, or the intake clearance again to calculate the closer clearance ("loaded gap" method). If your valve moved to 0 opener clearance, its highly likely your closer is loose. Ckeck again, take your time.

gzinga · Sep 24th, 2009, 11:54 am

Quote:

Originally Posted by GMP

The closing rocker is depressed to measure the closer clearance directly, or the intake clearance again to calculate the closer clearance ("loaded gap" method). If your valve moved to 0 opener clearance, its highly likely your closer is loose. Ckeck again, take your time.

yeah I did it last night kinda in a hurry since I was trying to get my R6 ready too......I will go over it again when I got a minute and then post again....perhaps I will PM you, will that be okay?

hyperdookie · Sep 24th, 2009, 1:06 pm

Quote:

Originally Posted by GMP

Are you absolutely sure your at TDC on compression stroke?

+1 Spin the crank 360 and re check.It's not rocker science.

gzinga · Sep 24th, 2009, 1:26 pm

Quote:

Originally Posted by hyperdookie

+1 Spin the crank 360 and re check.It's not rocker science.

how about rocket science?

hyperdookie · Sep 24th, 2009, 1:42 pm

Quote:

Originally Posted by gzinga

how about rocket science?

dicduc · Sep 24th, 2009, 5:07 pm

my engine the valve guide on the hor head was worn the retainers sliped out of position over time popped the valve head off the stem wore a flat spot in the cam ducati replaced barrel guides valves piston from the big bang
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