Join Date: May 2011
Location: Jacksonville, FL Area
Lifter going bad or worse?
I've searched all over the web and haven't found anything exactly like I'm experiencing so here goes...
I have a 2010 RGC with 36,800 on it. I had to have the engine rebuilt last winter at 32,700 miles, so I have a little over 4k on the rebuild. I went with a new S&S 3-piece crank, S&S 106 kit, Andrews 54h cams, feuling HP+ lifters, stock heads, and a baisley oil pressure spring.
In the last 2000 miles or so, I have had a lifter bleed down after the bike sat overnight. When I start it up, the oil pressure light stays on while the lifter rattles before it finally pumps up, usually about 3-5 seconds. It has been consistent like that, always pumping up and getting quiet.
Yesterday, I started the bike up and I got the rattle as usual and after getting ready, I rode away. After about 3 minutes of 20mph roads, I got a terrible, loud rattle/knocking/hammering noise that was there no matter the rpm. It was really freaking loud and I got off the gas and slowed down so I could pull over at the next street. Before I could get there, the noise faded out and the bike was nice and quiet again. The noise lasted maybe 30 seconds, and I figure the lifter bled down while riding, but is that even possible?
I continued on and rode to work, no issues. I was only at work about 3 hours before I left for home. I started up and headed out, and about 10 minutes into the ride, I got the noise again as I was merging onto the interstate. I took it easy again and stayed in the right lane, I was going to pull off at the next place and take a video of what was going on, but the noise quit after about 30 seconds. Then it was nice and quiet the rest of the way home.
Is it possible for a lifter to bleed down and the pump back up while riding? Could the noise have been a stuck valve or something? The knocking was way louder than the rattle I get on startup in the mornings. I am going to start the bike up tomorrow with video running to see if I can catch the noise again and post it on youtube. The bike seemed to run ok during all this, maybe some resistance to acceleration... I just hope I don't have another destroyed engine so soon. I run redline oils, it was changed 1800 miles ago. Are feuling HP+ lifters known to fail?
Anyways, is there anything I should look for that may not be lifters? I'll try to get a video up tomorrow if I can get the noise again. If I don't get the noise again, is it ok to go ahead and ride it? Thanks in advance for any insight to the problem!