Write-Up: 3rz Oil Pump Replacement

Kryptoroxx

New member
This was the most in depth maintenance I have done to the front end besides a water pump on my old toyota pickup. I learned a lot but if you have done a water pump you can do this also as easily. I wanted to do this maintenance but also show what's involved better than the other threads (who were very helpful BTW) I found in my quest across the forums.

Tools needed:
Hose clamps X2 (upper and lower rad hoses)
Crankshaft holder $65 bucks on amazon
Rubber bands
A plastic shopping bag or zip lock bags
An impact screwdriver
General metric sockets and wrenches
Torque wrench
A covered drip pan (if you save your coolant)
Hammer 2 lbs sledge works nicely


Parts and supplies needed:
Lc Engineering Allen head screw set for oil pump cover
Shaft seal
Oil pump cover seal
Toyota FIPG
Grease

Prep the area by dropping the skids, and getting your tools and supplies out. Some of this is going to take coordination if you work by yourself like I do.

First you're going to want to clamp and remove the upper and lower radiator hoses. Open the drain cock and drain radiator. Disconnect hoses and plug holes with rags. Remove radiator. Don't forget to set aside bolts with parts. There's a lot of them in this one. You can pull the fan shroud with it. Just remember to remove the lower part of the fan shroud or else you could break that part. There's a bracket that secures to the top of the fan shroud as well so disconnect that and flip it back over the engine. It's easier to just remove the bracket. Also run the lower radiator hose up to the top of the engine and zip tie it to something. This will keep the rest of the coolant from leaking if it's leaking.

7df2e0d55903ce9e06f81978bd504d95.jpg


ed361dc75e0ab87f0dfaf69dfea91d93.jpg


Second take the fan out. 4 12mm nuts. Use a box wrench to brace so that you can break the nuts loose.

Next remove the rest of the belts. I snipped mine as they needed replacing anyway.

Take off the leading pulleys from the crank. It's 4 12mm bolts.

Easy so far right? Now it's time for that special tool. You will need a 1/2 inch breaker and well....make that 2. One for the tool and one for the crank bolt. I have a 31" breaker bar and I still had to put some effort into it. It is torqued to 210 lbs after all.

4dbd2430b9f9560070a46ba9b311280d.jpg


Remove the bolt and pulley. It should just slide out. Do not mar the backside surfaces as that is what the seal slides on. Mess it up and you need a new pulley.

Now that was easy. Now drink a beer if you're of age. Otherwise it's a coke. This is arguably the hardest part and I would beat some Japanese engineer senseless for making the oil pan over secure with Phillips head screws. You can try a cordless drill.....but about half mike stripped so attempt at your own risk.

c76689437248cd3ad1254f925f331915.jpg


To use a impact screwdriver you need clearence for a hammer and if you strip the heads then this will be your key to bleed rhe a/c system and remove the condenser. It will take 1 large can and 1 smaller can to recharge fully. Pretty easy to do though. More on this later.

To bleed the system slowly undo one of the 10mm bolts on the dryer. It will hiss and smell bad. Its r134 and not freon. Don't rush the bleed. Just back off. You can also rent the tools from vatozone but I didn't know this at the time. After you get done bleeding cover all of the connections to the ac system quickly with a plastic bag and rubber band it to keep dirt and moisture out of it. This is the coordination part.

Ok now use the impact on the stripped heads. Watch your knuckles. It hurts if you mess up

1052909628a157ab6782bfa01bdbca51.jpg


72831d83fd1d7f3116b9e6681e40f87a.jpg


After that carefully pop the cover off using a seal separator or a flat head screwdriver

e983e202e3bd8b3804df8766455ec4d6.jpg


Replace the oil pump if you like or leave it. I replaced mine since it had 260 plus on the odo.

When replacing the shaft seal there are some very important things to remember. First is not to mar the outside of the housing. This will cause you to need a new oil pump cover. Second is to use a firm flat item to gently tap the seal in as evenly as possible. Flush with the rim is fine for this seal. Just make sure it's even. Last thing is to add some grease (a tiny bit, not even enough to cover your finger) to both the shaft and the backside of the crank pulley. This insures that the seal is not damaged when it starts rotating.

5a0916c45089db62f854edcb461bd9f5.jpg


Now what I don't have pics of is putting the little ribbon seal or fipg on. My hands were filthy and you don't want to dilly dally with that stuff. Once it sets it's good but you want it to set when everything is secured. I added fipg on the core all the way around for security. I also added fipg to the ribbon seal so it would stick in the channel more easily.

When tightening your Allen head bolts stitch the pressure meaning bounce from side to side instead of one after another. Thus ensures uniform pressure and that the cover seats properly.

Now do everything in reverse order and you're done. Amazingly everything went together easily and correctly.

I refilled the coolant and added the missing oil but left the truck to sit after that over night so everything could set up. Last thing I want to do is this seal again.
 
Register to hide this ad
Thanks! This was a really helpful post. I just want to add that it isn't necessary to remove the condenser to remove the screws holding the oil pump cover. I used an impact driver and a 27mm socket slipped over the end of a 3/4" galvanized pipe. I held the pipe/socket on the end of the driver by using a section of 1-1/4" galvanized pipe as a sleeve.
 

Attachments

  • IMG_20181021_101129886.jpg
    IMG_20181021_101129886.jpg
    134.7 KB · Views: 9,527
  • IMG_20181021_101514985.jpg
    IMG_20181021_101514985.jpg
    124.6 KB · Views: 8,854
  • IMG_20181021_101458030.jpg
    IMG_20181021_101458030.jpg
    122.1 KB · Views: 8,830
Last edited:
Much better idea. Please don't just vent your a/c system to the air. It is illegal and carries a hefty fine if you get caught. There is a $37,500 per day fine for venting illegally per EPA.gov.

I'm always able to find a mom and pops shop around me that will drain it with their special machine for $20. All it takes is a nosy neighbor or HOA "special agent" and suddenly you are out the equivalent of a nice fifth gen.

Otherwise, nice write-up and thanks for the details!
 
Last edited:
I'm having someone replace the oil pan gasket on my 3rz 4wd, would this be a logical time to replace the oil pump as well?
 
Thanks! This was a really helpful post. I just want to add that it isn't necessary to remove the condenser to remove the screws holding the oil pump cover. I used an impact driver and a 27mm socket slipped over the end of a 3/4" galvanized pipe. I held the pipe/socket on the end of the driver by using a section of 1-1/4" galvanized pipe as a sleeve.

So, in order to use this method with the pipe, it looks like you bent the shit out of the front core support to clearance enough to fit the pipe through. Am I seeing that right?

Edit: I just realized this is a really old thread. Doubt I'll get an answer back from this guy with one post, but he definitely failed to say he beat the shit out of the core support to make his technique work. [MENTION=148218]JZiggy[/MENTION], I'd have a hard time believing you would go full neanderthal on your truck to follow this guy's lead.
 
Last edited:
This is one of those Toyota designs that leaves me scratching my head. I'm guessing the reason for the countersunk screws is because the harmonic balancer doesn't afford room for bolt heads. But yeah, a torx or allen headed screw would have been a whole lot nicer for Toyota to use so you don't have to remove the AC condenser to perform this job.
 
So, in order to use this method with the pipe, it looks like you bent the shit out of the front core support to clearance enough to fit the pipe through. Am I seeing that right?

Edit: I just realized this is a really old thread. Doubt I'll get an answer back from this guy with one post, but he definitely failed to say he beat the shit out of the core support to make his technique work. [MENTION=148218]JZiggy[/MENTION], I'd have a hard time believing you would go full neanderthal on your truck to follow this guy's lead.

I think I was able to use a JIS bit on a little handheld driver and they came out without much hassle. I'm sure I Kroil'ed them beforehand as well.
 
I think I was able to use a JIS bit on a little handheld driver and they came out without much hassle. I'm sure I Kroil'ed them beforehand as well.

Gotcha. I definitely could envision you taking a mine sledge hammer to your core support.
 
Yeah I revived this thread because I'm wondering if I should have someone do this job if they're already replacing the oil pan gasket
 
Yeah I revived this thread because I'm wondering if I should have someone do this job if they're already replacing the oil pan gasket

I think they are separate jobs. You don’t have to take apart the same things for both of them, short of the skid plate.
 
Hey while this thread is active, What's the signs of needing a new pump? Just lack of oil pressure? Did it throw a code? Just wondering cause I have 235K/TMU on mine.
 
Hey while this thread is active, What's the signs of needing a new pump? Just lack of oil pressure? Did it throw a code? Just wondering cause I have 235K/TMU on mine.

I did this job simply to address the leaking front main seal. I replaced the pump components but I don't think it was necessary.
 

Members online

Forum statistics

Threads
278,307
Messages
3,554,056
Members
248,016
Latest member
Advally Service

Trending content

Back
Top