Thanks tloc,
I had a chance to look it over this evening. It is free and did not spew liquid when the plugs were removed. The engine is a model 460777 Type 2276B1
I watched a few youtube videos and it looks like you can grind the valve down to open up the gap if it's too tight, but it appears that mine have worn out of spec. on the wide side. When I put feeler gauges to it, I'm at .005 intake and .007 exhaust on one side and .006/.009 respectively on the other side. The specs I can find say both should be between .004/.006, so both of my exhaust valves are a hair out of spec.
That left me with these questions:
1. Is it the exhaust valve that controls the compression relief?
2. Would the prime suspect be tappet wear on the cam side?
I think I just answered the first one. After thinking it through, I ran back down to the shop and put a .005 feeler gauge into the gap between vlave and tappet, turned it over, and it cranked properly. However, when I pulled it out and cranked it, it continued to turn over fine. Maybe the cam got a splash of oil and took up a couple of thousandths??? I didn't re-measure the lash after that. I'd had the battery on the trickle charger (1 amp) for a couple of hours, but I don't think that caused it, I think it was the feeler gauge taking up the slack in the lash. Of course if the exhaust valve doesn't control the compression relief, that will throw my theory completely out the window.
I'll take more measurements tomorrow night and see if it still turns over properly, then let you know how it goes. In the meantime, any thoughts or ideas are welcome.
Thanks,
Aron
I had a chance to look it over this evening. It is free and did not spew liquid when the plugs were removed. The engine is a model 460777 Type 2276B1
I watched a few youtube videos and it looks like you can grind the valve down to open up the gap if it's too tight, but it appears that mine have worn out of spec. on the wide side. When I put feeler gauges to it, I'm at .005 intake and .007 exhaust on one side and .006/.009 respectively on the other side. The specs I can find say both should be between .004/.006, so both of my exhaust valves are a hair out of spec.
That left me with these questions:
1. Is it the exhaust valve that controls the compression relief?
2. Would the prime suspect be tappet wear on the cam side?
I think I just answered the first one. After thinking it through, I ran back down to the shop and put a .005 feeler gauge into the gap between vlave and tappet, turned it over, and it cranked properly. However, when I pulled it out and cranked it, it continued to turn over fine. Maybe the cam got a splash of oil and took up a couple of thousandths??? I didn't re-measure the lash after that. I'd had the battery on the trickle charger (1 amp) for a couple of hours, but I don't think that caused it, I think it was the feeler gauge taking up the slack in the lash. Of course if the exhaust valve doesn't control the compression relief, that will throw my theory completely out the window.
I'll take more measurements tomorrow night and see if it still turns over properly, then let you know how it goes. In the meantime, any thoughts or ideas are welcome.
Thanks,
Aron