Complete Coolant Hose Replacement (Toyota 3.4L 5VZ-FE V6)

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In this video, we show you how to replace the majority of the coolant hoses on a Toyota 3.4L V6 5VZ-FE Engine. This engine was used in 3rd Gen 4runners, 1st Gen Tacomas, T100s and 1st Gen Tundras. The only hoses we don’t replace is the upper and lower radiator hoses which we cover in other videos listed below.
*RELATED VIDEOS*
Stock Radiator Replacement
• Transmission Cooler In...
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• Champion Aluminum Radi...
Koyo Aluminum Radiator Install
• Koyo Aluminum Radiator...
Coolant Flush
• Cooling System Flush
*TORQUE VALUES*
Alternator Pivot Bolt - 38 ft-lbs
Alternator Adjuster Lock Nut - Go by feel for this one. At most 14 ft-lbs
Oil Cooler Bolt - 43 ft-lbs
Wheel Lug Nuts - 85 ft-lbs
*PARTS*
#87245-35670 (Heater Hose)
ebay.us/11C8hQ
#96134-42100 (Heater Hose Clamp) (Need 4)
ebay.us/opSFXu
#90467-22004 (Heater Hose Clamp) (Need 4)
www.toyotapart...
#87245-35690 (Heater Hose)
ebay.us/5DJbFf
#87245-35700 (Heater Hose)
ebay.us/jreULw
#90467-23009 (Heater Hose Clamp) (Need 2)
www.toyotapart...
#87245-35680 (Heater Hose)
ebay.us/2pFbTX
#87245-35710 (Heater Hose)
ebay.us/6VTBJ1
#87245-35770 (Rear Heater Hose in Engine Compartment)
ebay.us/EKj6NG
#99556-10300 (Rear Heater Hose in Engine Compartment)
amzn.to/3U3XR8r
#90467-14029 (Rear Heater Hose Clamps) (Need 8)
ebay.us/xRjAz9
#16261-62060 (Bypass Hose to Throttle Body)
amzn.to/4f3a3hD
#99556-10300 (Bypass Hose to Throttle Body)
amzn.to/4h5Oq2c
#96135-51300 (Bypass Hose Clamps) (Need 4)
ebay.us/k8GAe6
#87245-35451 (Rear Heater Hose Under Truck)
ebay.us/4R3OQB
#87245-35461 (Rear Heater Hose Under Truck)
ebay.us/K80dBA
#90301-67004 (Oil Cooler Gasket)
amzn.to/4gXJJaF
#90210-22001 (Oil Cooler Bolt Washer)
amzn.to/402ZeId
#15777-62020 (Shorter Oil Cooler Hose)
amzn.to/4dNxBGq
#15778-62030 (Longer Oil Cooler Hose)
amzn.to/3A9L3X8
*Toyota Red Long Life Coolant Concentrate (Needs to be mixed with Distilled Water)
amzn.to/37lyhBL
*Distilled Water - Pick this up at a grocery store
The Following are Associated Cooling System Parts Not Replaced in This Video
*1999 - 2002 Heater Control Valve #87240-35070
ebay.us/2o46Qb
*1996-1998 Heater Control Valve #87240-35050
ebay.us/kGNUWE
*Thermostat #90916-03075
amzn.to/2KJgNWp
*Thermostat O-Ring Gasket #16325-62010
amzn.to/34eZTqs
*Radiator #16410-YZZAJ (This is just like the OEM one that came on the vehicle when it was new)
ebay.us/E5r0F7
*Radiator #16410-AZ011 (This is a more affordable OEM style radiator but doesn't seem to be as well built as the original. I put one of these on my 98 4runner, but eventually swapped it out for an aluminum Koyo radiator) amzn.to/2O96iOj
*Upper Radiator Hose #16571-62070
amzn.to/2D3bi0z
*Lower Radiator Hose#16572-62090
amzn.to/2O97Fwr
*Radiator Cap #16401-20353
amzn.to/2XBm8UT
*HELPFUL TOOLS*
See Pinned Comment (1st Comment You See) For the Complete List of Tools Used in This Video.
**As Ebay Partner Network members, we earn commissions from qualifying purchases.
**As Amazon Associates, we earn from qualifying purchases.

[@TimmyTheToolman]

**HELPFUL TOOLS** *If you're looking for other tools not used in this video, check out Timmy's Master Tool List.* www.amazon.com/shop/timmythetoolman?isPublicView=true *P-80 Emulsion Rubber Hose Lubricant* amzn.to/3NmUSEr *1/4" and 3/8" Flex Head Ratchet Set* amzn.to/2ql8nNA *1/2" Drive Flex Head Gear Wrench* Ratchet amzn.to/2Wnbq2r *Flex Head Box End Wrench Set* amzn.to/31x8BOo *3/8" Drive 6 Point Metric Standard Socket Set* amzn.to/32WIh0M *3/8" Drive 6 Point Metric Standard Socket Set* amzn.to/32WIh0M *1/2” Drive 6 Point Standard Metric Socket Set* amzn.to/35dKQwW *1/4” Drive 6 Point Standard Metric Socket Set* amzn.to/2QIU7te *1/4” Drive 6 Point Deep Metric Socket Set* amzn.to/48fEVZc *Wheel Lug Nut Impact Socket Set* amzn.to/3w8Uwtc *3/8" Drive Wobble Impact Extension Set* amzn.to/2BwuOl4 *3/8” Drive Regular Extension Set* amzn.to/2OehCao *3/8” Drive Locking Impact Extension 33” Long* amzn.to/2Qe3l2j *1/2" Drive Breaker Bar - 24” Long* amzn.to/343Vcix *Ball Pein Hammer* amzn.to/2W5eHV5 *Milwaukee M12 3/8” Cordless Ratchet* amzn.to/2utRZsE *Milwaukee M12 3/8” Cordless Extended Reach Ratchet* amzn.to/3kOsUS6 *Milwaukee M12 Battery* amzn.to/3FJZO1j *Milwaukee M12 High Capacity Battery* amzn.to/2HEFTpu *Milwaukee M12 Battery Charger* amzn.to/2uo2o9x *90 Degree Needle Nose Pliers* amzn.to/2VYUro8 *Straight Needle Nose Pliers* amzn.to/2pQ6yIa *Knipex Large Diagonal Cutters* amzn.to/300BRRE *Hose Gripper Plier Set* amzn.to/3MKe8g2 *Long (11”) Needle Nose Plier Set* amzn.to/41eX8CP *Slip Joint Pliers* amzn.to/3PADm1R *Specialty Hose Clamp Pliers* amzn.to/4eHwvx8 *Small Pick Tool Set* amzn.to/3asf07P *Hose Remover Set* amzn.to/34aKF5z *CDI 1/2" Drive 30-250 Foot Pound Torque Wrench* amzn.to/2UPhyjK *Dewalt 1/2" Drive Impact Gun* amzn.to/47WYPsF *Dewalt Batteries* amzn.to/2urcx59 *Dewalt Battery Charger* amzn.to/2Ud8RlY *6 Ton Jack Stands* amzn.to/2MM91w6 *Heavy Duty Rubber Wheel Chock* (This is just one. I recommend buying two) amzn.to/3lNC3MG *Utility Blade* amzn.to/2JmZQjO *20 Piece Screwdriver Set* amzn.to/34aLrQ1 *Long Magnetic Parts/Tool Tray* (Good for holding longer tools like ratchets and wrenches) amzn.to/2m89y0D *Medium Size Magnetic Parts/Tool Tray* (Good Size for keeping track of fasteners/small parts) amzn.to/2ky8Qt8 *Small Size Magnetic Parts/Tool Tray Set* (Good for holding lug nuts or smaller fasteners/parts) amzn.to/3l5KnHg *Magnetic Pick-up Tool Set (4 Piece)* amzn.to/3FIrzY7 *Lisle Spill-Free Funnel* amzn.to/2SnrPFV *18 Quart Food Storage Container* amzn.to/2Bm3q9X *Plastic Fastener Removal Tool* amzn.to/2Y7qrYk **As Ebay Partner Network members, we earn commissions from qualifying purchases. **As Amazon Associates, we earn from qualifying purchases.

[@aoprngvua2]

Yes! Perfect timing! I've got a little pink drip coming from somewhere under the intake manifold on my 01 Tacoma and I was just about to put my own hose list together, but you've conveniently done it for me! I'll definitely give this one a watch when I get off work. Cheers Timmy! Remind me to buy you a beer 🍻

[@TimmyTheToolman]

Good luck with the hoses swap when you get all the parts together. It a bit of a pain in the butt, but you'll be glad you did it.

[@richardsauer599]

Your videos are top notch! 80 series and a 3rd gen? Good for Aaron!

[@TimmyTheToolman]

Thanks Richard. We filmed a bunch of videos the two days I spent at his place.

[@lmperialCoffee]

This is crazy! I was just doing a TON of research on hose replacement not two days ago! What amazing timing!

[@TimmyTheToolman]

@@lmperialCoffee I'm glad the timing worked out for you. I hope this video makes the job go smoother for you.

[@TheDesertRat31]

Interesting timing of this video. I just ordered all the coolant hoses to replace the originals in my 08 4runner. I figured at 320k, it might be time. They don't feel overly soft, buti don't want one to burst unexpectedly. I thought it was cheap insurance going forward. I also have a new water pump and thermostat from when I was chasing a coolant leak. Turns out it was a bad radiator. So it'll be a good time to put those other parts on also.

[@TimmyTheToolman]

Good luck with all the work. If you're going to do the water pump, you might want to just do a whole timing belt job. We have videos for it.

[@marvinshorty4611]

The cotter pin type hose clamp reminded me of opening a can of Spam or corned beef in the olden days. Lol. Keep the great videos coming.

[@TimmyTheToolman]

You know, I think I remember those kinds of cans back in the day. I was born in 1965.

[@jackwalsh1468]

Tim, another very educational video. Cheers, Mate.

[@TimmyTheToolman]

Thanks Jack!

[@jackwalsh1468]

@@TimmyTheToolman You're welcome , Tim!

[@eljefeslash]

Thank you for this, Timmy! I just bought most of the hoses recently to go along with replacing the heater control valve (for preventive purposes) and hadn't done the job yet. As always, you point out what each hose goes to/from (helping us to learn more about this rig), and you note the part #'s along the way (much appreciated!). A couple of questions: (1) if I'm just mainly replacing those heater hoses around the firewall and under the throttle body (not the ones under the rig and not the oil cooler hoses - yet), would I really need to drain the radiator? I just replaced my radiator not too long ago, so I hate to drain and replace that relatively fresh coolant again if I don't really need to. (2) I bought the colored silicone hoses. Do you think that P-80 lube would work ok with that material? Thank you! Hope you're enjoying retirement and getting to wrench and do more fun stuff!

[@benaldredge2671]

Great informative video. Appreciate you all taking the time to put together.

[@TimmyTheToolman]

Thanks Ben. It's our pleasure to share helpful information with the DIY Toyota Mechanics of the world.

[@MichaelMansour-g4m]

Tim, great video as always. I've replaced the oil cooler o-ring on all 3 of my 4runners. If u have a heat gun, that helps get that hard brittle o-ring out a little easier. Thanks MikeM

[@TimmyTheToolman]

@@MichaelMansour-g4m I like the idea of the heat gun. I'll have to remember that.

[@scotto3826]

I have an '02 Tacoma with the 5VZFE engine also. I've stared at that oil cooler many times while under the truck and came to the conclusion that I hope I never have to deal with it!! After watching this, I'm wondering if you think there might be any advantage to removing the oil cooler from the engine before disconnecting the hoses? Would that make it possible to get the cooler in a little better position/out of your way to remove the hoses? Just an idea. Since you had the guts to actually do this, I'm sure you would know if that would work or not. I've also heard that there is a kit you can buy if you want to delete the cooler all together. I've read that if you aren't driving hard or towing with the truck, you probably don't need it. Might be a consideration if the cooler itself is defective as I believe a replacement OEM cooler is $900.00. As usual, great video!!

[@TimmyTheToolman]

I'm not sure there would be any advantage to removing the oil cooler first before disconnecting the hoses. That shorter hose won't allow you must movement of the cooler after you disconnect it from the engine block. In regards to deleting the oil cooler, I wouldn't do that. And, there's not much that can go wrong with an oil cooler. They are built pretty stout and I've never heard of one failing. I'm glad you like the video.

[@sheerwillsurvival2064]

Holly 💩 that’s a lot of hoses

[@TimmyTheToolman]

I reckon so. It was quite a bit of work, but we gotter dun.

[@DarrenMyrum]

Hey Timmy and Shawn on your 98 with the trans cooler not running through the radiator any more how are your trans Temps? Iam thinking of doing it but was curious on Temps, also I seen a guy put a believe it was 1rt gen radiator in his 3rd gen wich is 18 inches instead of 22in which will move it up 4 inch what do you think and he was running a trans color no hoses to the radiator. Also he was in Canada ..just 4inch up is good clearance. Any of your Cali guys running it that way. Let me know. Have agood one guys and thanks for all you do.

[@TimmyTheToolman]

The trans temps are great on my 98, but I also employ all the tricks of the trade to keep the temps down, by turning overdrive off while climbing moderate grades 40-45 mph+ or climbing in 2nd gear at speeds below 40. There's also the trick of using 4Lo when climbing steep sustained grades. I haven't heard of the radiator swap, so I can't comment about it.

[@fredfred4083]

Great Video I want to do the same . Looking for some help for my 1990 4 Runner 3VZE engine I've have been looking for coolant hoses replacements but no uck could please help with some suggestions, Thank you.

[@TimmyTheToolman]

We've done a little work on the 3VZ-E engine, but not a ton. But, maybe we will tackle the same job on the 3.0L V6 one day.

[@MrCalifornia1234]

Good job Tim! How are you enjoying your retirement?

[@TimmyTheToolman]

Thanks! Retirement is good. I'm staying pretty busy with the KZbin channel and life.

[@sheerwillsurvival2064]

Great video 👊🏻

[@TimmyTheToolman]

Thanks!

[@FreeKanal]

I use acid free vaseline to lubricate rubber hoses. Also works great.

[@TimmyTheToolman]

@@FreeKanal Interesting. I've used silicone paste in the past before finding the P-80 Emulsion product.

[@FreeKanal]

@@TimmyTheToolman Yep, silicone works too and is safe for rubber. I use silicone from time to time i think it is CX80 silicone grease that i got.

[@TimmyTheToolman]

@FreeKanal I did have the silicone grease one time cause a leak on a 2UZ-FE engine. I used the grease on the bypass pipe o-ring that mates to the water pump. We had just finished putting the engine together after a starter replacement, and when we started the engine, we had a coolant leak that I identified as coming from the connection of the coolant bypass pipe with the water pump. I was pissed. So, we had to remove the intake manifold, disconnect the coolant pipe, clean off the silicone, and just lubricate the o-ring with coolant. What's weird is that I had lubricated that o-ring in the same manner when we did a timing belt job on his engine, and we did not get a leak. I also used the silicone grease on all the heater hoses with no leaks. But, I won't use silicone grease anymore now that I have that P-80 Emulsion lubricant.

[@FreeKanal]

​@@TimmyTheToolman Yep, that's weird. Maybe it wasn't the silicone's fault, but something else. Who knows ;) So far I haven't had any problems using silicone as a lubricant. But I've never used silicone with O-rings, as far as I remember, I use vaseline all the time.

[@TimmyTheToolman]

@@FreeKanal Yeah, I don't get why it failed on that circumstance. I think maybe the o-ring could have rolled a bit on installation. Whatever the case, I'll just use that other product from now on. I got enough of it to last 10 lifetimes of turning wrenches. There was a very small tube of it and then a larger jug. I figured I'd maybe run out of the tube so i bought the large jug. It's an overkill amount, but it's mine now.

[@JJ-rb3ss]

Just did all them about 2 weeks ago without removing throttle or intake lol

[@TimmyTheToolman]

@@JJ-rb3ss Damn! I would never try this job without removing the plenums and throttle body.

[@frankflores1917]

It must be a real hassle to do it without at least removing the intake elbow.

[@JJ-rb3ss]

​@@frankflores1917 oh yea thats the only thing i removed to get to the throttle coolant hoses

[@silverthirty5262]

You forgot to tape up the ports when removing all those heater hoses on the firewall 😮

[@TimmyTheToolman]

Yeah, we forgot to do it as soon as we got the intake manifold off. That was a brain fart, but I realized it after getting a few hoses off and then we taped off the ports.

[@CharlieCiampa]

Ut oh ​@@TimmyTheToolman

[@TimmyTheToolman]

@@CharlieCiampa Everyone screws up. Luckily nothing dropped into the intake manifold ports.

[@williamtsol636]

👍

[@TimmyTheToolman]

Thanks William!

[@TimBirchett2]

First

[@aaronscott2278]

We are all proud of you keep it up you will go places

[@TimmyTheToolman]

Good job! Unfortunately there's no prize for 1st. But, thanks for the comment.