Quote:
Originally Posted by MPKind
Oil: I will take your advice on oil weight. The 10w40 has several to choose from, the 15w40 appears to be marketed mainly to Diesel engines, right? Can you point to a couple preferred products in either wt?
Lash: I get the interchange of lingo. I'm not an engine builder, just an engineer that wishes he had more hands on experience with this stuff. I try to seek professional knowledge from those with a lot of experience and success. So taking the cam profile into account, the intake lash can be set to less than 0.010". Providing that intake and exhaust can be set independently, are you implying that exhaust lash should be tighter than the intake (based on the cam profile)? In a couple posts now you're indicating that exhaust could be set to near zero cold. I was guessing 0.004" as a starting point setting for the exhaust in my previous post, not referring to the aluminum head setting. My 455 has 6X-8 heads. Setting the lash looser than 0.010" makes more noise with minimal gains? Can't disagree.
Adjustment: Getting the cam on base circle isn't an issue, but I'm unsure how you determine when the lifter has fully bled out. AS you wrote, manually turning the engine seems like the best way to compress the oil out without introducing oil back into the chamber, which seems possible even at starter RPMs.
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The Penngrade in Formula’s the link would be good. Driven GP1 15w40 is usually what I use, neither one is a diesel oil. There are some Diesel oils that work ok, most have a lot of extra detergents in them though. If you set the clearance tighter 10w30 should be fine with a Vpro. If you want to run a lot of clearance the thicker oil helps noise some.
Using something that has a little leverage to help push the plunger down makes it easier to bottom the plunger out. Then you can more gently push until it the plunger bottoms. Set the clearance, push on it one more time after it is set, and check it again. Watch for valve movement when the feeler guage is removed to make sure the feeler gauge is not holding the valve open.