rHello all, I am in the same situation, with no oil in the rocker arms, found out that the gasket was upside down, since my mechanic repaired the block, and the unit was being used, like that, after a sertain period of time, a noise started to come out of the head cover, so, we put a new gasket, correctly, checked the rocker arms train, all looked ok, only the 4th rocker was hard to be moved up and down, so we disassembled all the rocker arms from the train tube, all looks good now, but now, with the gasket in the correct position, oil still does not want to up up to the rockers small breathers, nor to the set screw that is on one side of the rocker arm train, while engine running, oil doesn't go up, so we took the distributor off, put an old one without the gears that insert inside the block and using a cordless drill, we spun the pump, but still no oil came out at the rocker arm train, so I cranked the engine a few times, then oil started to come out, to all the rockers orifices, and taking off the set srew which is by the end of the train, oil came gushing out really nice, but after re cranking the engine again, oil stopped coming out, some say pump is bad, which I don't believe, others say might have been heated up the block and the camshaft and metals are the problem, any advice, I still don't want to take engine off, before getting another advice.

Update.... No matter how fast I spun the pump by hand, I could not get oil to come up to the pad where the rocker pedestals sit. I was getting plenty to the filter and sender so I buttoned it back up and started the engine. After about 45-60 seconds of idle time, oil started seeping from the #4 rocker weep hole and gradually moved to the front of the motor. I am now getting, what I feel is plenty of oil to the rocker shafts. This little lift-truck is running as good as new now and couldn't be happier. Thank you all for your help.

I just wanted to update this in case somebody uses the search function in the future.

Thank you tons for your help, all is well in the land of lubricated rocker shafts, now that the head gasket is on correctly.

I can tell you that you should not expect to see copious amounts of oil slobbering out like a gusher. The rocker arm and rockers are a fairly tight fitting bunch of parts if they are in good shape and when the oil is cold, you will not see much oil escaping the parts, especially so if you are only turning the oil pump while everything else is sitting stationary.
If you want to confirm oil is rising up through the block, loosen the rocker shaft pedestal that covers the oil hole in the block and then spin the pump.
And remember, it takes a moment to fill a new oil filter up too, and that has to happen before oil flows into the galleries.
Oh, and the correct direction of rotation for your drill will be counter clockwise, the same as the direction the distributor shaft turns. If you turn the pump CW it will suk.

What i posted above is true for h20 h25 engines

Best way to know if the head gasket that is already installed is on correctly is by looking at the gasket (if OEM) on back side of #4 cylinder. You should see a tab sticking out or overhanging the deck that looks like it has been cut with a pair pinking shears.

Ok... update. Finally got around to pulling the head off and the Head Gasket was, in fact, backwards.
But... While I have the head off I wanted to verify that we were getting oil. to that oil passage way. Is it possible to spin the oil pump with the drill and get it to push oil up that far... or does the engine have to be rotating for the oil to travel to that point? The reason I ask is because I'm getting nothing to the galley going to the head. I'm getting ready to pull filter and oil sender again to check there as well.

Engine has not run.... I took some 3/8" round bar and ground a flat end on one side so that my mechaninc could prime it before starting. He told me nothing was coming to the top. With the exception of some troubleshooting, nothing else has been done to this point.

At this point I want to ask "when did you notice a problem?"
If the problem was noticed because the tech was watching to confirm that the rocker train was oiling after starting engine before releasing unit to service (valve cover still off), it is possible that no damage has been done to the rocker shaft and rocker arms.
But, if the problem was noted only after the rocker train became noisy................you are going to have to replace the rocker shaft and all the rocker arms! There will be heavy scoring to both the shaft and the rocker arms.
We had a truck sent to us from another terminal because the engine was making rattling and squealing sounds after a vendor to that facility had replaced the head gasket.
The noises were the result of damage to the rocker shaft and arms from no oil.
Yep, head gasket upside down.
Questioning the folks at the other terminal revealed that the noises began about 3 days after the head gasket was replaced and unit returned to service.
Had to replace the rocker shaft and all rockers.

I pickup up a head gasket this morning for it. I have only had time to get the rocker shaft off but when I blew down the oil passage way through the head, it seems to be plugged, so... unless there is foreign material in the oil passage way, it looks like the head gasket is going to be the culprit.

if your going to be pulling the head to check this you should get a new head gasket to re-install the head with.
Once they are installed and torqued down on, the sealing surfaces around the cylinders and the gasket in general are compressed. At this point the gasket is not reusable. Even if you did happen to get the gasket off in one piece it still has been compressed and will not seal correctly.

Just make sure you put the new one on correctly. :o)

check the rocker shaft as well and make sure that path is clear as well.

The head gasket will fit well enough to allow installation if it is flipped upside down on the long dimension (end for end) but, as you will find................the oil passage will be covered over.

Excellent description. I have yet to even look at the head gasket but this seems pretty straight forward. Basically there is an oil passageway near the left front head bolt that has to share a hole in the gasket. Looks like I have my day planned out for tomorrow. Thank you so much for your help and the speedy response. I was told that you can't put the head gasket on wrong on the H20 so I have been trying to troubleshoot everything else and won't even get into that... I pretty much feel like a tool now. LOL..

From the driver's seat looking forward.
Cylinder head bolt at front of head, on the left side of head.
Gasket has a tear drop shaped cut out that connects the oil passage in the block to the head bolt. Oil flows out of the block into the tear drop shaped cut out in the head gasket.
Once the oil is in this cut out, it flows over to the head bolt and upward around the bolt. There is a drilled passage in the head that that connects the head bolt hole to another drilled passage, which matches a passage in the rocker arm pedestal. The rocker arms and rocker shafts are then fed oil.
You always gotta make sure that tear drop shaped cut out is located at the front, left head bolt hole on the block.

Could you elaborate more on this... I am having the same issue (Exactly) and even though I have not put my eyes on it myself, my mechanic tore it down a second time because that I what I told him. Problem is, he put it back together before i got to look at it so whoknows. Is there any way you could tell me exactly which hole or holes is the passageway up to he head. If not, my only option is to tear it down myslef so that I can put my eyes on it as its done.