Hello,

I posted this on another virago forum and got some help but before I split the engine cases I hope someone here can help me.
My problem is that there is zero oil  flowing to the external oil pipes that oil the camshafts.

At idle no oil can be seen. With the engine running at about 5000 rpms ,when I look down in to the main banjo bolt hole( where the bolt goes in to the right crankcase) I can see a very small amount of oil  but there is no pressure to push it upwards towards the banjo bolt. SEE PICTURE BELOW

I have done the following to test and the oil filter is in correctly and filling with oil.

** Removed oil lines and union bolts and blew pressured air though them.
** removed left and right crankcase covers and blew compressed air through and holes i could determine that were oil related.
** Replaced oil pump, oil pump chain and sprocket and blew air through the pumps oil pipe line.
** I tested the pressure relive valve from right side with a  screwdriver and there is strong resistance from the spring in the pressure relief valve. the piston inside returns as expected.

When the engine is started there is no oil visible in the oil window which I believe is to be expected and that suggests there is good pressure within the engine.

Still no oil flowing up to the external lines. With engine running oil does not come out of the right crank case where the external oil lines begin.
I am out of ideas. Does anyone know of the complete route beginning to end how oil is fed to the oil lines.

I was given the yamaha lubrication diagram but it is of no real help showing the exact oil route. Also if not a worn oil pump, blockage or broken pressure relieve valve what can cause this.

Thanks
Tom

Hi,

the lower screw of the three screws which hold the oil filter cover is a special one with a thicker shaft and only a shorter thread at the tip. If this screw is replaced by a "normal" one, oil flows from the filter housing back into the oil pan.

Thanks for the reply but it is the correct screw.

What's the condition of the seal in the right engine cover that goes over the crankshaft-tip? This should be in good condition and not worn or the like. Does your oil-pump have a locating dowel on the center opening, where it goes into the engine case?
Could you share pictures of your right sidecover and oil-filter cover please? (There's two types of oil-filter covers drilled in different locations and depending on the sidecover you may have the wrong one.)

Hope this helps
Greg

Hallo Tom,
is there enough Oil in the Motor?

nanno wrote:

What's the condition of the seal in the right engine cover that goes over the crankshaft-tip? This should be in good condition and not worn or the like. Does your oil-pump have a locating dowel on the center opening, where it goes into the engine case? Could you share pictures of your right sidecover and oil-filter cover please? (There's two types of oil-filter covers drilled in different locations and depending on the sidecover you may have the wrong one.) Hope this helps Greg

Greg Thanks for responding. That seal in the right right cover that goes over the crankshaft was not in great condition if I remember correctly. I will get a new one. So would that effect oil pressure to the main union bolt hole?

Yes my oil-pump does have a locating dowel on the center opening. Why

I am fairly sure it is original side cover and oil filter cover but I will take a picture later on.

Thanks
Tom

Gredner wrote:

Hallo Tom, is there enough Oil in the Motor?

hello, yes. The oil level is correct.

Hi Tom,
the Oil -fed is simple, Pump to Filter enclosure, then trough the Filter Cover into the right cover, where it splits into two lines: one to the Top (Heads),
one to the crank. ( Of course there is another Oil-Line for the gear-box, the pump has two rotors, one for the ball-bearings /Gear-box, one for crank and heads)
In case your Pump delivers enough pressure, the relief valve works, the Filter is mounted correctly (open end to the outside), the gasket for the right side cover is tight (also to the inside, very important) , and the sealing where the crankshaft sits on is good, the onliest possibility where pressure can disappear is the big end of the crank, the bearings for the Rod may be worn extremly, also the side to side clearance of the rods may be to much.
I would not run that engine until you found out what is wrong,
Ali

[full quote deleted by moderator]

Ali, thank you very much. This is exactly what i was looking for. I am hoping that it is the right crankcase cover seal that Greg mentioned.

Yup that seal is basically meant to take the full pressure of the oil-pump (minus the losses in the crank and filter), so any loss of pressure over there will be rather dramatic.

Regarding the missing dowel: Well I just had an engine on the bench where it was missing. Still produced good (enough) pressure when cold, but once hot the pressure dropped a lot.

[full quote deleted by moderator]

Well fingers crossed that is my problem. I ordered a new one and should have it on Wednesday. I will update this post when I install it.

Today I installed my new rightside crankcase cover seal (the one mentioned in previous comments). Still no oil pressure to top of crankcase cover

Taking Nannos advice( big thank you Greg) I checked the oil filter cover to see if it was the correct one.

Marking the  oil exit hole in the top of the filter cover and the oil entrance  hole in the crankcase cover ( to crank and camshafts), the 2 holes do not come anywhere close to lining up. The filter cover  hole  is over 1cm clockwise from the crankcase cover oil hole when the oil filter cover is installed

My bike is a 1985 XV1000 and it looks like the oil filter cover is from a 1986 and onwards xv1100 .

I looked online for pictures to compare filter covers .

The first picture with the bolts is the same as what is on my bike now and I now think it is Not the correct one.  The 2nd picture is what I believe to be the one that I need.

My question is should the 2 oil holes line up? ? This is making me crazy.

Tom

Yes the holes must line up. Thats why the oil filter must point to the outside with the open end. The oil flows from the filter housing through the paper into the filter and then through the cover and the holes in the engine housing to the oil lines which lead to the heads. The cover on the second picture looks like a TR1 cover.

Hey Tom,

the second one looks like spot on the money. Also V-star (BT1100, XVS1100) covers actually have the hole in the correct spot again, but the locating tabs are a bit thin(-ner) walled and I managed to snap off an ear in the past...

If you're really desperate, you could just drill a new hole into the cover in the correct orientation and plug or weld the other one up.

Thank you everyone for responding and your help. I was able to buy one on Ebay from  a guy in Canada. Should be here in about 2 weeks.  I was surprised how expensive they are. The XV1000 must be a rare bike. I am hoping this will finally fix the problem. Then I will continue to turn the bike into a bobber.

Today my new oil filter cover arrived and I installed it. Oil problem solved. Thank you to everyone that gave me advice.

:)