Why is the oil pressure on my Harley Davidson so low?
Sometimes it will increase when I rev the engine other times nothing. I have both an idiot light and a gauge. I expect to see a decrease when the bike gets up to temperature and at idle but this makes no sense as the oil pressure is all over the place. I changed the oil pressure sending unit and added the gauge just above the tappet screen.
Why is my oil pressure so low on my Evo?
As mentioned above, rocker arm bushings, lifters, pump body scoring, worn pump gears and lifter blocks are more than likely the cause. Something else to consider, at one time Harley put a restrictor in the top end oil flow to reduce the amount of oil to the top end and cause the slide to open earlier.
How does the oil flow in a Harley Evo?
Oil filters allow oil to flow in only one direction. You must examine the filter housing and connect the oil lines to. harley evo oil flow diagram You search Auto repair manual PDF harley evo oil flow diagram, if there are search results will appear below. If search results do not exist, please search by others keyword.
What are the oil lines on a Harley Davidson?
Harley Davidson oil flow diagram related problems. Ask your Harley Davidson oil flow diagram questions. Get free help, advice & support from top Harley.40 Micron – H-D Part #A (standard Evo filter) Oil Lines – The oil lines connecting the Smart Pump to the oil filter operate under high pressure and are colored RED in the diagram.
Sometimes it will increase when I rev the engine other times nothing. I have both an idiot light and a gauge. I expect to see a decrease when the bike gets up to temperature and at idle but this makes no sense as the oil pressure is all over the place. I changed the oil pressure sending unit and added the gauge just above the tappet screen.
As mentioned above, rocker arm bushings, lifters, pump body scoring, worn pump gears and lifter blocks are more than likely the cause. Something else to consider, at one time Harley put a restrictor in the top end oil flow to reduce the amount of oil to the top end and cause the slide to open earlier.
What should the oil temp be on a Harley Davidson?
One of my bikes is a 2002 FLHT, all bore 107″ built motor (124TQ/110HP). I run a Jagg low mount 10 row oil cooler and even now, in the mid 90s, oil temp rarely sees 220*. Your oil temps may see 230* or even 250* but that would not change your oil pressure which is not a function of the oil temperature.
What kind of oil does a Fatboy Harley use?
I have a 98 Fatboy (EVO Engine) with 25K miles on it. The oil pressure is very erratic and not consistent. I’ve already changed the oil and filter and checked the oil level. I also replaced the relief valve spring. I even took the valve out to verify it wasn’t sticking. The oil system is stock and it has a Harley filter and Harley 20-50w oil.