1987 GXL oil pressure issue?
#1
Junior Member
Thread Starter
1987 GXL oil pressure issue?
Hi Would anyone out there know what the specification for oil pressure should be in a running NA? At idle mine runs at 15 ft-in sq and Im not sure if that's ok or not because I've seen it higher before at like 30 ft-in sq.
#2
Rotary Freak
Fully warmed up the idle psi should be approx 30psi. At 3000 rpm the psi should be 60psi..at least.
Most bad oil pressure readings are not caused by the sending unit but by a gauge that has been damaged in the past. If doubt exists as to the real pressure buy a simple and cheap SUNPRO from autozone or pepboys or???? and install it temp. You'll need an adapter to screw into the engine housing after you remove the stk sending unit. The threads in the housing are something like 1/8" BSP and can be bought ??? got me. Pegasus sells em online or pepboys or whoever. I can't explain anymore than that. I've yet to see a bad sending unit (barring someone monkeyfucking it to death).
That stuff is given honorable mention in the LUBRICATION section of the FREE AND ONLINE factoryservicemanual or FSM. One or the other.
Most bad oil pressure readings are not caused by the sending unit but by a gauge that has been damaged in the past. If doubt exists as to the real pressure buy a simple and cheap SUNPRO from autozone or pepboys or???? and install it temp. You'll need an adapter to screw into the engine housing after you remove the stk sending unit. The threads in the housing are something like 1/8" BSP and can be bought ??? got me. Pegasus sells em online or pepboys or whoever. I can't explain anymore than that. I've yet to see a bad sending unit (barring someone monkeyfucking it to death).
That stuff is given honorable mention in the LUBRICATION section of the FREE AND ONLINE factoryservicemanual or FSM. One or the other.
#6
Rotary Freak
If it does...........that is the area where a dowel pin aligns the front "iron" with the rotor housing, and that dowel pin has a oring around it to prevent oil leakage. It's actually a passage for oil b/t the 'irons" and the housings.
The only way to stop that leak is .............rip the engine down and replace the oring(s).
The attached jpg shows the flow of oil in the engine. I used a red arrow to show the area of the oring mentioned and where they leak. That oil passage shown with the arrows showing flow direction............runs along the top of the housings and has a dowel pin with oring to prevent leakage at each mating surface of the housing to each other.
Make sense?
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#8
Rotary Freak
And the oil leak/residue I mention is b/t the front side housing and the front face of the front rotor housing. Not talking about low oil pressure but where and what the *residue* is and where it comes from.
#9
Rotary Revolutionary
iTrader: (16)
This *oil residue* you mention. Does it originate up high on the left outboard side of the mating surface b/t the housing and front "iron"? Just about the area where the word MAZDA is embossed????
If it does...........that is the area where a dowel pin aligns the front "iron" with the rotor housing, and that dowel pin has a oring around it to prevent oil leakage. It's actually a passage for oil b/t the 'irons" and the housings.
The only way to stop that leak is .............rip the engine down and replace the oring(s).
The attached jpg shows the flow of oil in the engine. I used a red arrow to show the area of the oring mentioned and where they leak. That oil passage shown with the arrows showing flow direction............runs along the top of the housings and has a dowel pin with oring to prevent leakage at each mating surface of the housing to each other.
Make sense?
If it does...........that is the area where a dowel pin aligns the front "iron" with the rotor housing, and that dowel pin has a oring around it to prevent oil leakage. It's actually a passage for oil b/t the 'irons" and the housings.
The only way to stop that leak is .............rip the engine down and replace the oring(s).
The attached jpg shows the flow of oil in the engine. I used a red arrow to show the area of the oring mentioned and where they leak. That oil passage shown with the arrows showing flow direction............runs along the top of the housings and has a dowel pin with oring to prevent leakage at each mating surface of the housing to each other.
Make sense?
Oh well, guess I'll just check my oil more often.
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