My car has 0 oil pressure after changing oil and filter. I had just had the engine rebuilded and was advised to change the oil after 1000 miles. Changed the oil from 10w40 to 20W50.

The car initially ran fine after the oil change, there was a slightly delayed pressure first start up, but pressure build up fine. The next day 0 oil pressure?! First I changed the oil back to 10W40 and used a new (porsche) filter. I checked; pick up tube, OPRV and the oil pump. Then tried priming the pump. Still no pressure. This has been going on for two months, what am I doing wrong?

Any help will be appreciated

 

Gauge is broken? Oil sending unit is broken?
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It's not a sender problem, no oil is reaching the filter when the engine is running, I've checked with the filter removed. Besides that the valve lifters are very noisy, so no oil is reaching them. Thanks for the quick reply

 

How much do you want for it? What shape are you in? Details, please.

Take it back to the shop, there must be a warranty on it.

 

You want the car or the kidney ?

 

Because I'm now using my bike to get to work and school everyday I'm in the best shape of my life!

 

Kidney.

 

I was hoping for some advise on how to fix the car.. How much is a kidney worth these days?

 

Depends how bad you need one I guess. In places like China they are pretty inexpensive I read. Pretty sordid, really.

But seriously, I'd take it back to the shop that did the work. If you start messing with it they can wash their hands of it.

I hear here's a nut on the front of the engine that needs a ton of torque for the pump to work properly...

 

is targa just netherand term for onvertable? or is it really a targa? can i see a picture?
~Eyal

 

I keep reading about oil pressure relief valve problems (sticking, etc.) with people changing the weight of the oil they are using. Take a look in the archives.

Other possible problem could be the torque on the crank pulley. But it's too suspicious that you just changed the oil when this happened.

 

What kind of pressure were you getting after the initial rebuild? Warm and cold please

 

Check you oil pressure relief valve and the torque on the crank bolt. The bolt is supposed to be tensioned to something like 175ft/lbs. Insufficient torque will keep the pump from building pressure. Coupled with your weight change and recent engine work, I would make sure to rule these out first.

 

Exactly what I suggest. I'd check the torque first if not go to the pressure releif valve. It has to have the filter housing aligned properly or it will bind. Good Luck

 

Pressure was 5 bar on cold start, when the engine was warmed up pressure was 1-2 bar at idle.

Will binding of the OPRV cause 0 pressure? Thanks for all the response