ohayou88

iTrader: (7)

Okay so here is the story. Rebuilt my TII motor. New springs, corner, apex, and side, and speced all other parts in good condition. New housings reused irons. re used oil rings. Only thing different in this motor is swapped out the oil pump. The old one looked like it had some wear on it so we swapped it out to another one that came from a car that we knew it worked. Never disassembled it just took the 4 10mm of the back. never messed with the lock washer or big nut on the front.

Put motor in car. Try to prime for oil pressure nothing on gauge. Take off oil filter dry as a bone. Disconnect front cover oil cooler line. Pour oil down oil filter pedestal until it comes out the line. reconnect it, pour some more oil in. crank the motor back and forth a couple times. prime for oil pressure again. Nothing. so i pour oil directly in through the front cover and do the same. No oil pressure. So pour some oil down the pedestal into engine. Fire it up for no more than 5 seconds to see if it will build pressure. no pressure again.

Remove oil pan, front cover. Change o-ring, oil pick up gasket, and swap back to old oil pump which worked when it was previously running(still never disassembled oil pump, so no way the key can fall out right?). Spun the oil pump while it was out of vehicle looked fine. Packed it full of petroleum jelly. Reassembled everything. Prime for oil pressure. nothing again. popped front oil cooler line off. dry. pour oil into front cover again. try to prime for pressure nothing. Fire it up again for less than 5 seconds no pressure again.

I am at this point? Anyone got anything. I mean there is literally no oil coming out the front cover. Even bad oil pumps push something out. But these build no pressure at all. I can crank the engine with the front oil cooler line off and nothing will come out the front cover.

Vehicle is 87 TII.

Aaron Cake

iTrader: (1)

Are you saying that even after the engine has run for 5 seconds, there is no oil in the oil cooler line or in the filter?

Because you will almost never build oil pressure by just cranking the engine, while even on a dry pump, oil pressure should be immediate after the engine is running.

If you are using the stock gauge to measure oil pressure, you have found your problem.

Even a well worn pump will still create pressure.

Is the chain from the pump to the eccentric installed?

Is the little key on the oil pump shaft to prevent the sprocket from rotating?

Is there a gasket between the pickup and the iron?

The pump in the RX-7 is a positive displacement pump. It will move oil when it rotates fast enough.

ohayou88

iTrader: (7)

exactly. when I turn on the engine after 5 seconds there is no oil from the cooler to the filter. I installed the chain, the pickup. I put some silicone on the pickup to seal it against the iron.

As i said i never disassembled the oil pump by taking the nut off the front. I took the 4 10mm of the back. And I put the gear in the back.

g14novak

iTrader: (1)

How much silicone? Have you tried manually pressurizing the system to see if its some sort of blockage, not the pump?

ohayou88

iTrader: (7)

well i poured oil down the pedestal and it flows to the oil cooler. some i good there. I have tried pouring it through the front cover to see if it comes out the pickup.

g14novak

iTrader: (1)

Is their flow coming OUT of the oil cooler?

ohayou88

iTrader: (7)

yes it drips out the oil cooler. when i pour it down the pedestal

g14novak

iTrader: (1)

Ok, so lets continue down the line. Try checking the oil pressure sensor. If not that, make sure oil is flowing through the turbo. Find out where its stopping at that its not making pressure.

If its none of those, your unfortunately stuck with a internal problem.

ohayou88

iTrader: (7)

well i pull the oil line off the front cover. and there is oil coming out of there. isnt that the first location the oil comes out of?

ohayou88

iTrader: (7)

anyone got some more answers?

HAILERS2

The oil pressure RELIEF valve is in the front cover. Is that installed right? Should be a large hex looking nut that screws into the bottom of the front cover and when unscrewed there is a spring and poppet looking valve. Are the spring and poppet valve in place?

OIl pressure gauges can't prevent oil from flowing to the oil filter and to me you've proven the passage b/t the pedestal and front cover are open.

Is he oil pressure regulator screwed into the rear housing? Really can't be that though. Oil would still flow from the pump.

The above ok? Take the pump that is NOT installed and remove the front gear to see if the small key is in place on the shaft. Reassy isn't quite so easy.

Before you try to spin the engine/start the engine again be sure to pour some oil in the passage in the pedestal hole that leads to the engine side of the pedestal so the bearings will get some oil. Usually it'll fill up pretty fast so turn the engine by hand til the oil level drops and then add more oil to the bearing/e shaft area.

Those oil pumps by now should have a good/normal film of oil on them and should flow oil when the engine starts. I see no need to pack the thing with vaseline etc.

Gotta go...........but isn't there a way to spin the oil pump with a ??? drill mtr with the front cover off, and then oil should flow? I forget right now. Never done that. LIke chain off......drill mtr on the front nut of the pump......oil in the pan......turn the drill mtr in the direction it normally turns........oil flows out of the pan to..........all over the place.

HAILERS2

Thinking about it a bit. At this stage you might just spin the oil pump with the drill mtr and see how things go instead of anything I wrote above. Save wear and tear on the bearings.

Do take a gander at the oil pressure control being installed or not, though.

ohayou88

iTrader: (7)

thank you hailers for your input. Yes im sure both are installed. Even if they were out of spec the oil would still be able to flow out the front cover i assume? and if uninstalled definitely would flow out the front cover?

I am going to be pulling the front cover and spinning the oil pump with a drill and hopefully it comes out that way.

ohayou88

iTrader: (7)

anyone got ne more input need as much info as possible.

hhn2002

well im completely stumped. i know its probably a silly question but this is a silly problem; is your oil pan completely full of oil?

ohayou88

iTrader: (7)

yes it is

HAILERS2

Not other than.........remove all the sparkplugs so the engine will spin much faster.

Leave the line loose at the front cover. As in the nut finger loose on the line connected to the front cover. All other things connected together including the oil filter.

Before putting the oil filter back on pump some oil into the passage that goes to the engine side of things so the bearings will have some lubrication.

Then with a fully charge battery, spin that engine over for thirty to ?? 45 seconds. IF no oil comes out from around that loose *B* nut on the oil hose connected to the front cover, your goose is cooked. Then you'll have to remove the front cover and frankly I doubt spinning the oil pump with the drill motor will do any more than what I just described.

Beats taking the front cover off again. Plenty of oil in the pan. Add just a extra quart in case.

hhn2002

could you have accidentally blocked off the oil path between the front cover and the end plate?
try cranking the motor with the end plate off, it will be messy but worth a try.

arghx

iTrader: (3)

you're getting to the point where you need to pull the motor and re check everything oil related. it's easy to miss stuff with the motor in the car, and every task takes twice as long when the motor isn't on a stand.

ohayou88

iTrader: (7)

alright update guys. I pulled oil pan and front cover again. I verified there is flow from the front cover all the way to the pickup. this is the 3rd oil pump ive tried. even changed drive gears, chain, and pickup this time. Still no oil pressure what so ever.

hhn2002

how'd you verified the flow? by pouring oil through the front cover?

HAILERS2

When the Starter is turning the engine over, AND your at the front of the engine looking aft, which way is the pulley turning? Clockwise or anti clockwise?

That's the best I could come up with today. Must be the heat. Did you try using the drill motor on the nut on the oill pump assy?

ohayou88

iTrader: (7)

used a oiler can. poured it in through the front cover. and it came out the strainer.

the pulley is spinning clock wise. yes i did. no oil still.

HAILERS2

Sorry. Makes no sense to me. Got a screen filter with a pipe on it that goes to the housing. The hole in the housing goes to the pump etc. You've got a real problem with no fix that I can figure out from here.

If it was only one pump I'd say the pump or the key on the gear or even the loss of the small set screw that holds the innner gear of the oil pump stationary is the problem if it fell out. But three pumps?? Wheeeeee. Have fun. Sorry 'bout that.