Tweet
My apologies to everyone for being an ass. I'll try to avoid it in the future... but it's just my nature.
Sappy- my suggestion that the pushrods might not be the correct length wasn't meant to be a comment on your workmanship. See, I've been a heavy equipment mechanic for 13 years, and I've been burned more times than I care to remember by parts that *should* be right. I've learned that when unexpected problems arise, one can't assume that 'new' parts are necessarily 'good' parts.
In my experience, the more obscure (or custom) the part, the more likely you'll run into problems. From 1500 miles away, incorrect pushrod length was my best guess. Looks like I was wrong.
3100-95-modified: I wasn't aware that you had actually laid hands on the engine and checked the lifter preload yourself- must've overlooked that in the 16 pages. I've read enough of your posts that if you say the preload is ok, then I believe that it's ok. So much for my initial hypothesis.
I can understand why ya'll would be looking at lifters at this point- by process of elimination if nothing else. I don't quite understand why they'd fail NOW, when they were apparently working before... but stranger things have happened.
The only other idea I have that I'd like to throw around is this: I've seen, on several occasions, where irregularly worn cam lobes make a noise that sounds a lot like a lifter. I can't suggest any way to confirm this... and it doesn't lead to any satisfactory solution... but I wonder if there's something strange about the lobe profile of this 'custom' re-grind. I've noted that others here have similar aftermarket cams that don't make this noise- but is anybody here running the same part number cam?
Sappy- my suggestion that the pushrods might not be the correct length wasn't meant to be a comment on your workmanship. See, I've been a heavy equipment mechanic for 13 years, and I've been burned more times than I care to remember by parts that *should* be right. I've learned that when unexpected problems arise, one can't assume that 'new' parts are necessarily 'good' parts.
In my experience, the more obscure (or custom) the part, the more likely you'll run into problems. From 1500 miles away, incorrect pushrod length was my best guess. Looks like I was wrong.
3100-95-modified: I wasn't aware that you had actually laid hands on the engine and checked the lifter preload yourself- must've overlooked that in the 16 pages. I've read enough of your posts that if you say the preload is ok, then I believe that it's ok. So much for my initial hypothesis.
I can understand why ya'll would be looking at lifters at this point- by process of elimination if nothing else. I don't quite understand why they'd fail NOW, when they were apparently working before... but stranger things have happened.
The only other idea I have that I'd like to throw around is this: I've seen, on several occasions, where irregularly worn cam lobes make a noise that sounds a lot like a lifter. I can't suggest any way to confirm this... and it doesn't lead to any satisfactory solution... but I wonder if there's something strange about the lobe profile of this 'custom' re-grind. I've noted that others here have similar aftermarket cams that don't make this noise- but is anybody here running the same part number cam?
Comment