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2zz Oil Pump Gear Change

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2zz Oil Pump Gear Change

Postby manos3003 » Tue May 30, 2017 8:34 pm

Right, we all know that 2zz engines suffer from pump disintegration due to resonance frequencies doing their magic at high rpm, usually over-revving scenarios.

There is two ways to fix it; one is to upgrade the sintered gear in the oil pump with a billet one and the second is to change the crankshaft pulley with a Fluidampr or another harmonic dampening pulley spec'd for a 2zz engine. They're almost mutually exclusive solutions, and I chose the oil pump gear upgrade for two reasons:

1. I had purchased from Toyota a new pump to install
2. I had already purchased from Eliseparts an oil pump gear :lol:

This is how I did it and found it the best way to replace the gear without causing damage to the Philips screws holding the pump shell together.

Apart from a new Toyota oil pump (recommended, as any aftermarket billet gear is machined and toleranced against brand new assemblies) and a billet gear of your choice (Toda, Eliseparts, MWR etc) you need the following tools and process steps to complete the job.

1x long ratchet (you'll need all the torque you can get!)
1x suitable adapter for screwdriver bits for the ratchet
1x hammer (YES! HAMMER!)
1x vice ( in a pinch, a friend holding the pump can also help :lol: )
1x the biggest/fattest Philips screwdriver bit in your kit

Process Steps
  1. Start by placing the screwdriver bit on the screw head and hit it hard with a hammer until it's solidly in place.
  2. With the pump secured on a vice (or with a help of a friend holding it completely flat), attach the ratchet and rotate counter-clockwise to undo the screws
  3. Remove sintered oil pump gear and replace with billet
  4. Assemble the pump and tighten the bolts as much as practically possible (avoid damaging the bolts heads)

It's a quick job, the only tricky bit is those Philips screws holding the pump together.

I hope you find this useful. Any questions on this, fire away :)
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I can't recall a day when I drove my MR2 and it didn't put a smile on my face

2000 Spectra Blue Mica - 2ZZ-GE DIY swap, Eliseparts uprated oil pump gear, K&N filter with Eliseparts MAF housing, Megillian Motorsport exhaust

Seems a project far from finish, but that's the exciting bit :D

For more info, have a look at my build thread

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Re: 2zz Oil Pump Gear Change

Postby shnazzle » Tue May 30, 2017 9:30 pm

Thanks Manos!
I'll put this in the How To section
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