512tr Oil pump P#121059 cant find any where

Did you try eurospares.co.uk?
Ferrparts in the us recently parted a 512TR, they do have some engine parts available.

 

when I try to open the ferrparts page ( https://ferrparts.com/ ) it is only a white screen. can someone help?
I´m looking for 2 valve covers for a testarossa ( may be old or new sytle )

 

What was the oil pressure gauge doing before this engine overhaul ? Did you have better pressure before the rebuild. The scratches in the oil pump would have been there previously so might be an idea to look elsewhere. Have you checked the oil pressure relief valve, where ever that is ?
I would expect the oil pressure gauge to be going hard over from cold and the red light coming on should be ringing alarm bells.
Might be an idea to not run it before you really damage the engine as something does not sound right here.

It might be the pump but that would have been a problem before- was the crank and bearings in good condition at the overhaul ?
Is it possable to drop the sump cover with engine in place to look at the crank, oil pick up etc.

 

If the oil pressure was ok before the engine overhaul then the oil pump must be ok. A few scratches in the oil pump casing is not going to cause this lack of oil pressure. For the oil pump to be that worn then the oil pump bearings would have to be falling to bits.
Is this a dry sump engine ? If so does it have suction oil pumps as well.

 

yes right, some scratches on the pump won't cause zero oil pressure, even with high clearances you should still get reasonable pressure. I think you could replace the pump and find you have the same issue.

I assume the 2 scavenge pumps are pushing oil into the oil tank and it's above min level?
Since you have the pump out, check the pressure relief valve as it seems most likely this is being held open.
Could be something blocked it (silicone????)

 

It is either:
A bad gauge
A bad pump
A bad pressure relief
Too much bearing clearance
A oil galley leak

Do you have a photo of the plastiguage which confirms the final bearing clearance before final assembly?

If the oil pressure was decent before the rebuild, I would doubt the oil pump is the cause.

Don't drive it!

Best luck...
Vincenzo

 

Looking for the same, I checked all the usual suspects and NLA. I also came up empty handed for complete used one. Any chance someone here have one for sale?

 

The pump is not the problem. Put a new oil filter on it and see what happens. Use the correct UFI filter. Start simple.

 

I've never seen one that needed to be replaced.

 

And if the pressure relief is stuck its nice that you can access it if you drop the oil pan.

 

First, did you used a known good mechanical gauge to check pressure? If not, start there.

Could you have swapped wires?

 

Thanks for the feedback. All is well with my pump , I'm looking for a spare for different reasons. Although great tips if I ever see a drop in pressure.

 

I agree with all of this but the bit about the bearing clearence has me puzzled, these style of pumps usually have pressed in bronze bushes in the end covers that the gears run in, so you measure the bearing internal size and the bearing journal on the gear to give you the clearence- where does the plastigauge come into this ?

 

Main and rod bearings?

And Plastigauge is a very poor way to do it in any event.

 

You're supposed to assemble the engine minus a crank. Heads and liners installed with bearings then measure the ID. Measure crank OD. Voila. It's a pain but it's the right way.