Cam Install Problems
R&R was as simple, or even easier than the TCs. Buttoned it all back up after adjusting the PRs to 2.5 turns per SE directions. spun the motor over with plugs out to get some oil going. Fired it up and there's considerable clacking up top in the rockers that doesn't go away. Idiot light for oil pressure says ok. Only ran it for about 30 seconds upright on a lift. Repeated the install/adjustment of the PRs to see if I was off somewhere in the adjustment, fired up again same result. Decided to tear it all back down today and validate the install.
When I took the cam cover off, a considerable amount of oil came out, I was surprised by that. It was above the bottom of the cam plate. There wasn't that much oil in there the first time around. Yes, both o-rings were in place on the feed and scavenge at the pump. There was oil inside the cam plate, inside the pump itself, and in the passages out of the cam chest so it seems the pump was working. Oil was getting up through the PRs as it came out the holes in the PRs when I took them out. The outside of the PRs weren't really wet with oil, but the stockers weren't either IIRC.
Disassembled the pump and carefully inspected, everything seems fine. No bad surfaces or anything. There doesn't appear to be a lot of differences between a mid 2017 pump and the latest other than the scavenge port size. Cam plate looks fine, everything looks fine really. I'm quite sure I had the cam on the base circle per cylinder when I adjusted the PRs. I used the SE PRs on my TCs, so it's not my first time with those. Not sure if I was off there, like some folks say 3.5 turns on higher lift cams or if I have an oiling problem. Hate to not use the latest pump and backing plate, but I've given thought to just putting the originals back in.
I was just going to carefully assemble again and maybe go a little deeper on the lifter preload and triple check I'm totally on the base circle when doing it. But after seeing that much oil come out of the chest I'm not sure. Those of you that have done cams, would you expect that much oil in the cam chest after running the bike upright for 30-45 seconds?
Another thing, while inspecting the new pump and bringing over the original feed gerotor I'm sure I kept the orientation (inside/outside) of the gerotors as they were (feed and scavenge). It's possible while looking at things I got them out of their original orientation. They appear to be symmetric, so I'm not sure that would be too much of an issue but I'm throwing it out there.
Appreciate any thoughts and discussion.
Should not have to go deeper on preload
was the oil pump seated fully? takes a bit of push to make sure its seated and cam plate seats against the case, although tightening the plate would most likely seat the pump as the bolts were drawn down.
could it be you did not run the engine long enough for the lifters to pump up?
Thats all I got for ya.
Last edited by sixguns; Feb 21, 2019 at 09:55 PM.
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Last edited by Agoober; Feb 21, 2019 at 10:04 PM.
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Should not have to go deeper on preload
was the oil pump seated fully? takes a bit of push to make sure its seated and cam plate seats against the case, although tightening the plate would most likely seat the pump as the bolts were drawn down.
could it be you did not run the engine long enough for the lifters to pump up?
Thats all I got for ya.
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I suppose one of the lifters could be bad, not sure how I'd test that. The stock lifters were trash at 16K miles so can't put those back in.
I have a set of Gaterman TC lifters from an old project, suppose I could throw those in if it's still noisy after assembly.
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