|
First time at setting the cam timing, and it really wasn't difficult. This was for checking valve to piston clearance assembly, so it knew it was coming apart again.
I have new DC20 cams that are backdated to the old style "big 46mm nut".
I didn't have any special tools except for a dial indicator. I used a 1-13/16 socket to tighten the 46mm nut. Of course this means I can't hold the cam steady, with the giant socket covering the end of the cam. I snugged the nut up so that the washer was squished flat, but didn't torque it to the full 150 ft lbs.
Surprisingly everything was easy.
The cam did not rotate while tightening the big nut
When removing the big nut while setting the overlap, the cam did not try and spring around.
Holding the cam steady with just a17mm open end wrench on the flats allowed me to relocate the pin to the right spot.
and spinning it around 720 degrees, everything was right on target at 2.2-2.4mm intake valve lift on the dial indicator.
That was all just to find out if the valves were too close. I shouldn't have worried.
the reliefs in the JE pistons meant for plenty of clearances.
The closest either valve came was 3.1mm from the piston. That was intake at 30 deg after TDC starting the intake stroke.
Of course it's torn apart again, because now I get to do it all again, this time with sealants on the gaskets...
Richard
|