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No oil pressure!!

starboard147

starboard147

New member
Help!! Just rebuilt the back end following an RMS replacement. Turned over the engine with the DME out - no oil pressure! Noticed nose of car was high so levelled it out - then got oil pressure briefly before it dropped to zero... Front pulley bolt had come loose so retightened it (I had used it to lock engine to loosen/tighten clutch and flywheel bolts so must have loosened). Still no oil pressure!!! I've got oil, the pulley is tight. I've pulled the filter and the 'priming' hole is full of oil. Was advised to check indication system by grounding sender terminals one at a time - was told to expect to see warning light to come on for one and max reading for the other. Well, I get the warning light with both and no significant deflection on the needle with either (it just flickers, slightly more for the spade than the ring terminal).

Question - does that indicate a problem with the oil pressure indication system???? I can't seem to find anything in the manuals, in Clarks, Haynes, etc on the pressure indication system, and the cct diags aren't that much help. Does anyone know how to check it?
 
Crank pulley sandwiches the oil pump drive& turns it by friction, so pulley loose would mean no oil pressure. It sounds like the gauge is playing up as well, the sensors do fail.
 
Thanks, Rich, just found it myself. From the table, low resistance = low reading so therefore my info was wrong - earth the terminal and the gauge should read zero.

Might recheck pulley squareness - my guess was that at 210Nm and with the pulley already engaged on the woodruff key, it should go on properly. I didn't bother taking balance and timing belts off...and would still prefer not to!

Yes, mechanical gauge would be good but not sure where to get one... Thinks...
 
Front pulley had 'locked' on crank/woodruff key so managed to get 210Nm of torque but no drive to oil pump. Think it was tension of balance belt on front pulley that stopped it going on properly. Took all the belts off, torqued up the front pulley, rebuilt and, hey presto, normal oil pressure!!!

Ran it to warm it to operating temp and no leaks from RMS, so that seems to have worked as well! 10mm deep than than stock 12mm seal has cured the leak. Time to put some miles on it now...

Have you bought any more bolt on goodies yet?
 
Glad its sorted!!

No more goodies but have done headgasket and w'pump. You?

You still going to Prescott?....will see you there if so.

Rich
 
Swapped g/boxes, RMS, service, belts, 968CS anti roll bars - it's kept me busy!!

Yes, will be at Prescott so will see you there - are you running up the hill?

 
Not running up the hill - just in the orchard area.

Should be quite a few Porsches I understand?

Anyone else going?

Rich
 
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