DIY 2nd Gen Water pump replacement

SH7mi · Jul 13, 2019

1GR said: ↑

Water pump usually "fails" by form of leak, or by making noise. Never seen the fins actually fail.
Click to expand...

Referring to ‘making noise’, is the noise a low whine, mine just started with this noise and I’m thinking it’s the water pump?

ToyotaRoamer86 · Jul 13, 2019

I see you have a NONSTOP TUNING pulley, Do these really have any noticed difference?

ToyotaRoamer86 · Jul 13, 2019

tan-ishman said: ↑

hello all!

Is this the "weep" hole I should be looking at if there is a coolant drain?
Click to expand...

Thoughts on your NST pulleys? do you run the whole kit?

BassAckwards · Sep 14, 2019

Does anyone have the part number for the front water pump gasket circled in yellow? is this the fel pro 35654 that has been mentioned in this thread?

Oreo Cat · Jul 24, 2020

I need a new water pump is it worth it to fork over more $ for OEM or will a autozone pump work the same?

hualampeter · Jul 24, 2020

Oreo Cat said: ↑

I need a new water pump is it worth it to fork over more $ for OEM or will a autozone pump work the same?
Click to expand...

Get oem, i got mine for 78 bucks

matadorCE · Aug 23, 2020

I'm in the middle of doing this on my truck, is it necessary to remove the belt tensioner? It seems that one of the water pump bolts sits right behind the tensioner pulley. Also, about what size is the tubing for coolant drain holes?

Oreo Cat · Aug 23, 2020

matadorCE said: ↑

I'm in the middle of doing this on my truck, is it necessary to remove the belt tensioner? It seems that one of the water pump bolts sits right behind the tensioner pulley. Also, about what size is the tubing for coolant drain holes?
Click to expand...

No the pulley can come off of the tensioner it’s just a reverse thread

BlackTaco22 · Nov 19, 2020

jlleiber said: ↑

Great write-up! I'll be using this when I replace my wp this weekend. Have a couple quick questions though -

on the service manual it says to torque some bolts (A) to 80 in-lb (6.7 ft-lb) and other bolts (B) to 17 ft-lb. I'd hate to over-torque or under-torque some of them. Do you know which is which? Also, on the service manual it shows to install a new gasket on the water pump. What gasket is this? I already have the outlet o-ring that is shown. Does the Aisin wp come with this other gasket?

thanks!
Click to expand...

There are 10mm bolts and 12 mm bolts that hold the water pump onto the engine. The 10mm bolts are torqued to 80 inch-lbs. The 12mm bolts are torqued to 17 ft-lbs. Here is a youtube video to confirm this. Hope this helps everyone out!

https://www.youtube.com/watch?v=Ctp_DLckE6w

specter208 · Mar 7, 2021

I have an used engine with 100k miles. Engine is being prepped for installation. Is there a way to test if the original is still good or not?

Oreo Cat · Mar 7, 2021

More than likely it’s fine at that mileage, I had a 220k, 3k, and new all side by side and there really wasn’t a difference. The brand new one was a little harder to spin but even the 220k one was still ok to use

specter208 said: ↑

I have an used engine with 100k miles. Engine is being prepped for installation. Is there a way to test if the original is still good or not?
Click to expand...

igno1tus · Mar 7, 2021

Should water pump be replaced at a certain mile interval or if your doing belts and pulleys?

I have 125k on mine and intend on doing belt and pulleys

igno1tus · Mar 7, 2021

05sctaco[OP] initial post: ↑

DIY 2nd Gen water pump.

This write up is for information only, I take no responsibility for damages, and it is your choice to perform work on your vehicle. I purchased parts from rockauto.com. Please use common sense, don’t work on your truck when the engine is hot.

Tools needed:
Socket extension, Ratchet , 10mm, 12mm, 14mm socket, Vise grips , Flat head, Thread lock.

Parts:
Thermostat with black housing (do not buy just the thermostat once I removed it and looked at the one they sent me it is not correct), Water pump w/ gasket (Aisin is what I used), thermostat O ring, water pump O ring, new radiator hoses (optional), hose clamps (optional).

Step 1.
Remove the Radiator top shroud.

Step 2.
Empty the radiator fluid the peacock is next to the driver side tire. Take care not to break it.
Empty the coolant in the engine, there is a drain plug on each side of the engine block.

Step 3.
Remove the top and bottom radiator hose, remove radiator hose from over fill tank.

Step 4.
Unbolt the fan from the water pump, unbolt the fan shroud, holding both lift up and out of engine compartment.

Step 5.
It is optional to remove the air box all the way to the throttle body but not required, I did not do this.

Step 6.
Remove serpentine belt.

Step 7.
Unbolt water pump in a star pattern, and thermostat assembly. Look in picture of water pump. Use your hand to feel around for hidden bolts. The upper assembly where the top radiator hose attaches to has two hidden bolts, one on each side of the bottom. Also you’ll need to move the belt tensioner to get to the bolt behind it. Unbolt 2 pulleys.

Step 8.
Place towels to catch excess coolant from water pump. Remove water pump . it’s a little tricky with the upper assembly but you can manage to slide it out. Next remove water pump gasket.

Step 9.
With new water pump add the O ring, remove old thermostat w/ housing and place in new O ring and thermostat w/ housing (you can see the black housing in pic one).

OEM water pump is made by Aisin.

so is the block.

Step 10.
Repeat steps in reverse for installing water pump. Bolt with a little thread lock and in star pattern, Do not over torque the bolts, and it would seem like they’ll keep spinning.

New pump new pulley's.

Step 11.
Fill radiator with Toyota super long life coolant, or whatever one is compatible. Start engine with heater on full, thermostat is at 180-185 degree’s to open. Warm up, cool down, add more coolant. I.E. Burp the system. You are more than welcome to flush the radiator and engine, but my coolant was pink, clean, and non burnt smelling.
Click to expand...

Thanks man ! Good write up

Oreo Cat · Mar 7, 2021

igno1tus said: ↑

Should water pump be replaced at a certain mile interval or if your doing belts and pulleys?

I have 125k on mine and intend on doing belt and pulleys
Click to expand...

I think as long as it’s not leaking it’s good

specter208 · Mar 23, 2021

I’m doing a timing chain and water pump on an engine. The water pump has 2 bolts that extra long and go through the timing cover and are touching the chain tensioner swing arm. Is this normal. I’m wondering if I mixed the bolts up.

AJM2 · Jan 12, 2022

Hello all. Just finding the forum. I’m in process of replacing the original water pump in my 2008 v6, 303k miles. Thank you to 05sctaco for starting thread almost 10 years ago, as well as all of the replies- very helpful! I wiped out the right side of pump last before starting reinstall of new pump and an odd shaped off white rubbery gasket came out on my rag… looks like the edge of it in 05 s taco’s pic (trying to upload) Question is, what is it and does it need to be there or need to be replaced? I’m at work now so don’t have pic of what came out but will try to take pic of it tonight…thanks in advance!

TacoTuesday1 · Jan 12, 2022

Oreo Cat said: ↑

I think as long as it’s not leaking it’s good
Click to expand...

I would wait for it to leak on a trail

AJM2 · Jan 12, 2022

Thanks guys. Here is the pic of what came out. I haven’t started to install new pump yet as I’m not sure whether this should be stuck back in there or just left out…..can’t see that it’s serving any purpose but ‍♂️

toyoda_fan · Mar 24, 2022

Sub'd for future reference. Thanks OP!

novanut21 · Apr 13, 2022

All of my 12mm bolts for the water pump have a sealant on them. Do I need to clean them and put thread sealant on them?

Log in or Sign up

Welcome to Tacoma World!

DIY 2nd Gen Water pump replacement

#121
SH7mi Elite Performance Tune PA MD DE NJ

#122
ToyotaRoamer86 Well-Known Member

#123
ToyotaRoamer86 Well-Known Member

#124
BassAckwards Well-Known Member

#125
Oreo Cat Worst Member

#126
hualampeter Well-Known Member

#127
matadorCE Well-Known Member

#128
Oreo Cat Worst Member

#129
BlackTaco22 Member

#130
specter208 Well-Known Member

#131
Oreo Cat Worst Member

#132
igno1tus Small member

#133
igno1tus Small member

#134
Oreo Cat Worst Member

#135
specter208 Well-Known Member

#136
AJM2 New Member

#137
TacoTuesday1 Well-Known Member

#138
AJM2 New Member

#139
toyoda_fan Member

#140
novanut21 Well-Known Member

Products Discussed in

Log in or Sign up

Useful Searches

Welcome to Tacoma World!

DIY 2nd Gen Water pump replacement

#121 SH7mi Elite Performance Tune PA MD DE NJ

#122 ToyotaRoamer86 Well-Known Member

#123 ToyotaRoamer86 Well-Known Member

#124 BassAckwards Well-Known Member

#125 Oreo Cat Worst Member

#126 hualampeter Well-Known Member

#127 matadorCE Well-Known Member

#128 Oreo Cat Worst Member

#129 BlackTaco22 Member

#130 specter208 Well-Known Member

#131 Oreo Cat Worst Member

#132 igno1tus Small member

#133 igno1tus Small member

#134 Oreo Cat Worst Member

#135 specter208 Well-Known Member

#136 AJM2 New Member

#137 TacoTuesday1 Well-Known Member

#138 AJM2 New Member

#139 toyoda_fan Member

#140 novanut21 Well-Known Member

Products Discussed in Entire Site Forum: 2nd Gen. Tacomas (2005-2015) Thread: DIY 2nd Gen Water pump replacement

#121
SH7mi Elite Performance Tune PA MD DE NJ

#122
ToyotaRoamer86 Well-Known Member

#123
ToyotaRoamer86 Well-Known Member

#124
BassAckwards Well-Known Member

#125
Oreo Cat Worst Member

#126
hualampeter Well-Known Member

#127
matadorCE Well-Known Member

#128
Oreo Cat Worst Member

#129
BlackTaco22 Member

#130
specter208 Well-Known Member

#131
Oreo Cat Worst Member

#132
igno1tus Small member

#133
igno1tus Small member

#134
Oreo Cat Worst Member

#135
specter208 Well-Known Member

#136
AJM2 New Member

#137
TacoTuesday1 Well-Known Member

#138
AJM2 New Member

#139
toyoda_fan Member

#140
novanut21 Well-Known Member

Products Discussed in