458 low oil pressure

So my car actually does have low oil pressure, as soon as I rev it after a cold start the pressure drops to 0 and I can start to hear the ticking of the lifters. We tried replacing the oil pump below the engine with no luck, any ideas of what is controlling the oil pump? I know there is two oil regulators in top of engine and below the valve cover, should I replace those?

thanks in advance.

 

I dont know this engine but most oil pumps have a pressure setting valve on the pump itself, looking at the diagram it shows a filter seal which i assume goes between the engine block and the pump, if this was not fitted correctly , would it be pulling air into the pump. I dont see any pressure adjustment elsewhere on the diagram. With a zero pressure reading it is time to get it to a workshop before you wreck the engine

 

We checked the seal, it was clean. Car has 14k miles and I would assume if the pump wasn’t mounted properly, there would be oil seepage there which there wasn’t. It’s not a constant 0 pressure reading if it idles there is normal pressure but once I rev it, it goes to 0. Trying to get some advice on wherelse to look before I send to a shop as I am capable of replacing things if pointed in the right direction

 

I wonder if it's possible that it has a faulty sending unit? And if there is a way to measure it by attaching a gauge somewhere to the engine so that you can verify the reading on the dash is correct?

 

We did attach a pressure gauge and it’s definitely losing pressure, running out of ideas.

 

Sounds like a flow issue? Did you confirm no obstructions on the oil pickup screen?

Part number 100332 in 255176 on the diagrams.

Assume you replaced the oil filter / new oil when you changed the pump as well?



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Correct oil level ( assuming dry sump ?). Is level dropping at same time as pressure- restricted returns ?

 

A restricted return would more likely cause a increase in pressure. I suspect blockage on the suction side (why pressure drops when rpm comes up)


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A restricted return would give you less oil for the pump to suck on, it is not going to bring your oil pressure up.

 

interesting issue, hope you update the community with your findings once its sorted and not just vanish good luck

 

I just came across this thread searching for something the other day and wonder if your problem might be similar:

https://www.ferrarichat.com/forum/threads/engine-failure-from-stickers-blocking-oil-pump-intake.629866/

 

https://www.instagram.com/tv/CF2sgQdJQfX/?igshid=606dkmx4miar