Billet Oil Pump Gears
 

I'm making this post to accomodate people who got stuck with gears they cannot use due to some problems with not knowing which gears go with which engines.

Some Escorts/Proteges

Some Escorts/Proteges have a smaller diameter pump on some motors. It is not clear which motors this effects. There is a possibility that these motors are the short nose crank version. I'm not sure, but I will probably not offer that size pump until the CMM machine gets fixed at the shop I work with.

Miata long nose oil pumps
Miata long nose oil pumps are the same from 1991.5 until 2000 and these are the vehicles that the gears fit. If you are in this range no worries.


The VVT years 2001-2005
The VVT years of 2001-2005 are physically thicker.

If you have an oil pump gear gripe that relates to it not fitting your vehicle please post here so we can get to the bottom of it.

The 2001-2005 gears are coming soon so I can simply swap you for if you bought the gears and have these years.

If you have an escort/protege year that it does not fit, post here. Instead of selling a new gear I'll "sell" yours and get you out from underneath your paper weight.

Hope this helps clear things up.

Does the 1999 motor fall in with the rest of the long nose? I have a set of your gears that I'm planning on installing.

Yea your fine, just a typo!

on the list for trade for 01 gears.

Ive got a protege gear that is sitting in a bag of oil. Let me know when you want it back Travis.

Thanks for posting this. I bought a set each for my '94 and '01. Put me on the list to trade one set for an '01.

Any idea which oil pump the MSM has?

I really don't know. I think it should be the same as the 91.5-2000 years, because the motor is already setup for turbo stock. This motor w or w/o turbo has oil squiters, and more extra pump capacity then atleast some of the motors that preceded it, but the only way to find out would be to pluck it and measure.

I need to get rid of mine for the 2001 gears.

If you need the 01 gears and have the older set go ahead and send them back to me to the return address. If you don't have the address just PM and I'll get it taken care of.

Travis, I could buy it back from him (I've got a 96). modernbeat; where are you located and how much would you want for those shipped to NJ?

So where are we at with the 2001 gears? I've shipped my old gears back and haven't heard anything.

They came in today, the big thing is, we made them based on a very warn oil pump housing. So I'm a bit apprehensive about sending this out. They fit the warn housing but I don't know about a new one. So y8's is sending me his, so we have more notes to compare. I ran seventeen of these, so if they do end up fitting y8's housing these will all go out(and we'll shortly know what fits in what).

oh snap. you're all waiting for me and my spare motor is under wraps. and it's cold out.

since I haven't looked at it yet, can the pump come off without taking the oil pan off? I dont have an engine stand, so it's a little awkward to pull the pan.

I couldn't get it off without taking the pan off... I tried, and now I have a bent oil pan.

shit. dont wanna bend a highly sought after 01 pan. I guess I could lay it on its side. hope it's empty!

pump's off. i'll ship it out this week. apologies for stripping the head of one of the backing plate screws. :)

wear doesn't look too bad or uneven.

Question: Is there a gasket between the pump body and the block? Mazda does not list one, and I can't remember if there was one present or not.

I do remember one O-ring in a recess on the pump.

All my housings are at the cnc shop, but the whole o-ring I remember that you should have is on the nose of the crank where it engauges the crankshaft.

no gasket. just rubbery RTV goo.

Ok, sooooo... Update time

This is what we know about all currently sold, and current model oil pump gears.

The oil pump gears width clearance (side clearance) has been set between .005-.006 depending on wear and how perpendicular your housing is. Thats just what we made them. This is completely acceptable as we've seen housings running on .011 clearance without problems of oil flow, or pressure. Yes its at the edge of the design requirement from factory but this greatly increases the capacity of the fluid bearing to keep the gears off the wall of the oil pump housing which is soft... soft aluminum.

Second.

Y8's housing with some wear recorded .006 with the new gears cut. That seems to be on task with what we want. The big thing I want to point out is the disturbing amount of wear in these housings. Y8's housing, and Abe's housing has shown a lot of wear. I believe both housings were under 40k miles and they were in worse shape then a pre-vvt oil pump at 200k miles. I'm not talking about a little bit either, if you tried to run a VVT oil pump for 150k miles as stock from the factory, I doubt it would make it. If your running one of these VVT housings, I would definitely say you should change the gears to a wider clerance gear then factory or you'll be in the same shape these guys are in. Questionable housings with bad wear patterns.

I have the 01-up replacements and I'm happy with the end product. So these are going out today. Please, please, letme know your clearances that you measure when you install these.

what was the clearance of the OEM gears in my/abe's housing?

I believe yours was .004 and then it tapered to .006, abes was at .004 and tapered to .009. Around the edges theres not much wear, but right where the teeth are these housings are really getting chewed on.

Any progress on the 2001+ gears? I'm still waiting for mine.

Modern, I had thought I'd already sent yours, letme check my records again. Sorry for the delay!!

HEY that reminds me, what's the story on my pump and gears? you mentioned my wear was an issue, but with the right clearance gears, is it going to last a while? and if so, when ya gonna send it all back? :)

Heh, jeeze modernbeat, start a riot why don't you?? :) j/p I think he's still poking at yours, I'll ask him tomorrow.

so are the billet gears really worth it??? i mean what are the chances that the stock ones will fail?? besides how many vendors have them??

haha

Travis, I'm not in any hurry. I'm just afraid I'll forget if I dont get them back within, say, a couple months?

I'm the only vendor that has them for under $400. :giggle: Failures are reasonably common on high horsepower and high RPM vehicles. Your engine will basically last about 3 seconds in highload conditions. The damage is almost immidiate, and it usaully destroys the block.

I'll have your pump back to you soon. It won't take much longer.

Modernbeat, could you please PM me your name and address?

Travis

What's going on? I sent you my address on the 24th.

I sent them on Friday I believe. USPS w/delivery comp and insurance. I had to check through my records, I'm actually usually aloft somewhere too, so getting to everything is sometimes a task in my limited time w/my hard copy records. The whole reason it took longer then expected is also because of the oil pump housing wear. We're not sure on where these housings should be. Make sure you check them when you install them for proper fit. We've seen housings with over 10 thousandths of wear. The factory housings are not made properly they are too soft. So I was apprehensive about sending these out to anyone, but here they are.

Travis

trav, what about laser cutting a wear plate to fit in under the gears?

Thats the really expensive way to do it, I had that priced, and ouch! We have another way we are considering, but the price for the assembled unit is going up and up with these teaks. I think the retail might be 300-330 if I do what I have in mind to the housing to foreverize it.

what is turn around time on a '99 gear? I let my friend use his and just decided to pull my motor and put these in...with much dismay.

Ready to ship!

I just tried to email Boundary off their website, but got an error message. can someone email me their phone number? I need to buy a set of gears for my time attack car. The stock ones gave up and ruined an engine. I don't just want to input my credit card info into a website without having spoken to someone first.

Matt Andrews
matthew dot andrews at motorola dot com
949-275-3513

Your fully built FM stroker with 76mm turbo was using stock oil pump gears?

wow

I don't believe there were any decent gears on the market at the time the engine was built, and the ATi wasn't yet available.

What's the latest scoop on the factory '01 pump gears? Are they higher volume than the earlier ones?

The 01-ups I'm getting ready to take down off the website. The housings are just too torn up for a one size fits all. We do custom machining on the 01-up housings and put in a set of gears that are about 20% larger in the direction that makes the difference in pumping volume. So the new machined housings are high flow, but the old 01-up's were just replacements.