05-05-2015, 09:30 PM
|
 |
Senior Member
|
|
Join Date: Jan 2014
Location: North Carolina
Posts: 769
|
|
Quote:
Originally Posted by sgt.porter
Had a little time to poke around the cub this evening. My feeler gauges went AWOL, (I have 3 boys and share property with grandpa, common problem), but I don't need them to see what's going on.
Basically, the exhaust valve is slightly opening during the compression stroke!
Watching the valves and the piston (through the peep hole) with breather removed, turning engine clockwise (from drivers seat):
1. Intake valve opens as piston moves downward (aka intake stroke)
2. Piston moves upward (aka compression stroke) but about halfway through the stroke, the tappet presses on the exhaust valve, slightly opening it (observed at tappet and through spark plug hole)
3. Power stroke seems normal
4. Exhaust stroke seems normal
I'm not an engine expert, but I'm pretty sure it's not supposed to work like that. As stated, the engine acts like there's no compression, now I can see that is exactly the case.
I took video, but no idea where to put it or how to post it.
|
Why does that feel like deja-vu? 
http://www.onlycubcadets.net/forum/s...ad.php?t=36455
Read posts 5 and 6.
|