What's the deal on these oil pumps?
I've heard from some that the 280ZX turbo has a higher volume and higher pressure oil pump. Others say its only the 280ZX turbo with a factory automatic transmission?

Does anyone know for sure, and if so... why does one have more pressure?
Does anyone know the specs for them; how much pressure are they supposed to have vs. the non-turbo.

 

Bleach, This is what I have researched. Hope this helps.

"Virtually any L-series oil pump will install on an L series engine. also nearly all L series oil pumps have the same part number being 15010-21001. There are two exceptions. The first being 280zxt oil pump being 15010-S8000. This was the first and only change to an original equipment Lseries oil pump since the Lseries intro. The second exception is the Nissan Motorsports high pressure oil pump, 15010-A1110."

Now to the "why" in your question. "The output for standard and competetion pumps is 0.49 fluid ounces (14.5 ml) per pump revolution. The output of the 280zxt oil pump is 0.55 fluid ounces (16.4 ml) per pump revolution. The higher volume is for the additional oil to the turbo. It was accomplished with 5mm (0.20 in) longer gears, or 35mm (1.378 in.) versus 40mm (1.575 in) internally. Externally the turbo oil pumps are unchanged. High volume and high pressure are for the most demanding applications."

the above excerpt taken from "How to modify your Datsun/Nissam OHC engine" by frank honsowetz

Ali

 

Sweet, thanks.

 

Is there a need for a larger oil pan with the higher volume pump? My pump leaks and I want to replace it with a higher volume pump and add the high pressure springs from Motorsports but I don't want to have to change the pan too.

 

Oh WOW I dont remember seeing this.. LOL /\

 

So Any Turbo Pump Will Flow More? Or Is It Just The Year Bleach Mentioned?

 

All the Turbo oil pumps outflow the NA ones. And just for reference, the high volume oil pump you see MSA advertising is in fact just a stock turbo oil pump. If you check the part numbers you can verify this.

 

BLEACH said only the turbo automatics oil pumps ? i have a turbo manual tranny ? but i got and complete rebuilt 1983 280zx tu engine in my 1981 280zxt that im taking apart ...

 

IT IS ALL TURBO OIL PUMPS. NOT JUST AUTOMATIC

 

I did not state that it is only the Turbo with auto. I was asking a question...

It seems all the oil pumps on the turbo engine with any transmission are the same.

 

Time to bring a thread back from the dead

Alright so I finally got my oil pump off. Not how I intended but it's off. Problem is that it exploded. Yes, you read that right, it exploded. One final strike of the hammer split the case in two

So now for my question: Has anyone tried retrofitting the turbo oil pump internals into an NA pump?

All the internals of the pump came out undamaged so if I can just make this swap then it's all good. Turbo pumps are a little pricey and I can get a used NA pump for free.

And not to get this tread started again but... when you try to buy a turbo oil pump the pump intended for the manual cars is more expensive then the automatic equipped cars.

 

I bet it has to do with the fact that there were less manual turbos, as opposed to auto turbos. Just like the fact that the Z31 and 280ZX share the same injectors, yet the Z31 injectors can be had for cheaper. It's probably the fact that most people don't know, so you charge a higher price for the Turbo pump on the manual tranny. That's just my guess. Also with a leaky oil pump. Generally if it's leaking that, would just need a new gasket right? That wouldn't neccesarily be that the pump itself is leaking unless it has some kind of hole or is split open, right?

 

Correct on the gasket question.

 

strangely, I thought we decided in this thread that the turbo oil pump was the same in the auto and T5. How then would Nissan even have two different part numbers for them?

Since then, I have heard that the Z24 oil pump is the same as the high volume L-series. So if you're in a wrecking yard and see a 720 or Hardbody truck, check it out and see. Sometimes yards charge 5-10 for an oil pump.

 

Well I got the NA oil pump today from a buddy and I pulled it apart to find out that the internals are not swappable. Not directly anyways. The rotor and its cylinder are too long for the NA body. The width is identical. The only difference in the housings is that the turbo pumps internal bore is drilled deeper than the NA's. So I'm going to get a hold of a machine shop and see if getting that sucker bored deeper will run me less than a new oil pump. If I could go to a junk yard then I'd do that but I'm on lockdown

 

Bleach, weren't the timing chain kits for the L24 and the L28 pretty much identical, although the part numbers were differnet? There doesn't seem to be rhyme or reason to the way they decide to choose part numbers. The only reason I can see it is just so they could sell one for more than the other.

 

some of the timing cam sprockets were different from each other... some were heavier than others. Bleach had a pic comparing them.

 

oh ok, I missed out on that one. That throws my theory out the window. Unless maybe there was a slight difference in the parts themselves. The only other reason I could see, was maybe the car was originally designed to be Turbo Automatic only. Then when the 5-Speed was released some of the parts got recategorized?

 

Now I'm just drawing a conclusion here out of desperation but I did some thinking. Now the turbo itself uses very little oil. In fact, most recommend restricting the oil flow to the turbo cause it's getting more oil then it needs anyways. So then I thought, maybe that extra volume is for the oil cooler equipped cars. Now an oil cooler would actually make use of that extra volume. I dont have an oil cooler so I'm wondering if I even need the extra volume the turbo pump puts out I can swap the higher pressure spring over as thats a direct swap but I'm seriously considering using the NA oil pump. I'd hate to sacrifice my turbo though if this ends up being a bad idea

I only bring this up because there are plenty of naturally aspirated vehicles on the market that have turbo kits adapted to them with absolutely no upgrade in the oil pump department. The turbo really doesn't use that much oil at all.

Your thoughts?