I have a DL1000, 2007 with 35000 miles. I've inspected all tappet clearances at about 30000 miles and one of the rear cylinder intake valves was at 0.000 (the other at 0.004). I replaced the shim accordingly to achieve a 0.006" clearance. I rechecked the clearances after additional 5000 miles (at 35000) and again the same one was tight at ~0.000. A valve clearance changing by at least 0.006 within 5000 miles (only one out of 8 being out of spec. is somewhat suspicious. Any advice of what can cause this rapid clearance change? I've performed the checks according to the manual.
I've completed a cylinder compression test as outlined in the manual. The front cylinder produced ~160 psi whereas the rear cylinder ~145 psi. According to the manual:
Overhaul the engine in the following cases:
-compression pressure in one of the cylinders is less than 114 psi
-difference in compression pressure between cylinders is more than 28 psi
-all compression pressure are below 142 psi, even when they measure more than 114 psi.
Test results are OK, hopefully it was just a carbon build up
I've completed a cylinder compression test as outlined in the manual. The front cylinder produced ~160 psi whereas the rear cylinder ~145 psi. According to the manual:
Overhaul the engine in the following cases:
-compression pressure in one of the cylinders is less than 114 psi
-difference in compression pressure between cylinders is more than 28 psi
-all compression pressure are below 142 psi, even when they measure more than 114 psi.
Test results are OK, hopefully it was just a carbon build up
