New 124" build is sumping?
#1
New 124" build is sumping?
OK guys I need some help here. I'm running out of things to check. I had a complete bottom end rebuild done on my 08 Street Glide. I had a Jim's 4 5/8" crank installed, the Timkin bearing conversion was done and the cases were bored for 4.125 pistons. I had the heads done, and new valves and springs. I assembled it with new cylinders and pistons and a new stock oil pump. I fired it up with no problems heat cycled it a few times and took it to a tuner in the area.
He called the next day and told me it was sumping. He took the cam chest apart and I had put the wrong O ring on the scavenge side of the oil pump when I put it together. OK simple enough right, NOT. He called back the next day to tell me it was still sumping. I trailered the bike back home, ordered a Feuling cam plate and oil pump. Put it back together and it still sumped. I pulled the oil pan everything was clean and clear. I started following the oil path and found that the port from the sump back to the scavenge side of the oil pump seemed to be blocked. I pulled the motor back out, split the cases and found what was left of a black ty-wrap in the crank case. I wasn't happy but at least I had found the problem, or so I thought, NOT.
I blew out all the oil passages, made sure the cam plate and the oil pump were clear and reassembled the motor again. I noticed that the oil pressure at start up seemed a little higher than before, 50lbs at idle cold. I let it warm up and then took it for a short ride, maybe 2 miles. Everything seemed fine and I thought once again that all was good, NOT. It was still sumping, so bad the oil gauge was all over the place 10lbs to 35lbs. I figured I missed a piece. I tore the motor down again and found nothing, its spotless inside. I blew out the came plate nothing, dissembled the oil pump, clean.
What am I missing?
He called the next day and told me it was sumping. He took the cam chest apart and I had put the wrong O ring on the scavenge side of the oil pump when I put it together. OK simple enough right, NOT. He called back the next day to tell me it was still sumping. I trailered the bike back home, ordered a Feuling cam plate and oil pump. Put it back together and it still sumped. I pulled the oil pan everything was clean and clear. I started following the oil path and found that the port from the sump back to the scavenge side of the oil pump seemed to be blocked. I pulled the motor back out, split the cases and found what was left of a black ty-wrap in the crank case. I wasn't happy but at least I had found the problem, or so I thought, NOT.
I blew out all the oil passages, made sure the cam plate and the oil pump were clear and reassembled the motor again. I noticed that the oil pressure at start up seemed a little higher than before, 50lbs at idle cold. I let it warm up and then took it for a short ride, maybe 2 miles. Everything seemed fine and I thought once again that all was good, NOT. It was still sumping, so bad the oil gauge was all over the place 10lbs to 35lbs. I figured I missed a piece. I tore the motor down again and found nothing, its spotless inside. I blew out the came plate nothing, dissembled the oil pump, clean.
What am I missing?
#3
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Yea all the O rings are good. I even disassembled the Feuling oil pump to make sure the two internal O rings at the plate that separates the two gerotors weren't pinched or distorted. I have to be missing something. I'm not having a minor sumping issue it's filling the sump in no time.