Oil Cooler Gasket & Hose Replacement (Toyota 3.4L 5VZ-FE V6)
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- เผยแพร่เมื่อ 6 ก.พ. 2025
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In this video, we show you how to replace the Oil Cooler Hoses and Replace the Oil Cooler Gasket that seals the oil cooler to the engine block 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.
*RELATED VIDEOS*
Complete Coolant Hose Replacement (Toyota 3.4L 5VZ-FE V6)
• Complete Coolant Hose ...
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*
#90301-67004 (Oil Cooler Gasket)
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#90210-22001 (Oil Cooler Bolt Washer)
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#15777-62020 (Shorter Oil Cooler Hose)
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#15778-62030 (Longer Oil Cooler Hose)
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*Toyota Red Long Life Coolant Concentrate (Needs to be mixed with Distilled Water)
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*Distilled Water - Pick this up at a grocery store
*HELPFUL TOOLS*
If you're looking for other tools not used in this video, check out Timmy's Master Tool List.
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*P-80 Emulsion Rubber Hose Lubricant - (I didn't show the use of this product in the video, but this is a great rubber lubricant that allows you a much easier time to get the new hoses over the fittings and to be able to do any manipulation of the hose once it's on the fitting) amzn.to/3NmUSEr
*1/4" and 3/8" Flex Head Ratchet Set amzn.to/2ql8nNA
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*1/4” Drive 6 Point Deep Metric Socket Set amzn.to/48fEVZc
*Wheel Lug Nut Impact Socket Set amzn.to/3w8Uwtc
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*3/8” Drive Regular Extension Set amzn.to/2OehCao
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Milwaukee M12 3/8 Cordless Extended Reach Ratchet
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From those of us who need to keep these units on the road as long as possible...Thanks!
You're welcome. Maintenance like this can make a big difference in the longevity of your engine. If a coolant hose bursts and you don't catch it in time, you very well might be looking at a top end rebuild of your engine, or a complete replacement of the engine.
It's people like yourself that post these extremely valuable videos that help the rest of us perform successful repairs. You are cool! Thank you very much!
We appreciate it and you're very welcome!
I replaced the gasket and washer on my ‘98 Tacoma over the weekend. It wouldn’t have been possible without this video. Much appreciated! No more drips!
I'm glad our video helped you out. Good job fixing the leak.
Thank you for making this a separate video and breaking down this piece of it. As always your videos provide all the needed information for people to properly maintain our trucks and keep them running. I'm at 230k and plan to never sell... Didnt have many service records when i got it so I've used your videos to perform a ton of preventative maintenance. Keep up the good work
Glad it was helpful!
Tim while redoing my front suspension I noticed when I removed the skid plate there was oil on the driver's side of the skid plate. I thought it was the oil filter. NOPE. It's the oil cooler! 98 4Runner. 324k miles. It's on the list of things to do this summer. It's not a big leak but it's there. I will be investing in those bend needle nose pliers since you like to use them in your videos. lol. Thanks for making this video!
You're welcome Frank and good luck with the job once you get around to doing it.
A few things I might add, having done this earlier this year: you really should add a little o-ring safe grease to the o-ring to keep it from falling out as you put the oil cooler back on. Mine got slightly misaligned and I started the engine and it made a huge oily mess. Also, if I were to do it again, I might be tempted to buy two o-rings in case one gets messed up. One more trick: the short coolant hose that goes from the cooler to the engine block can be a pain. I got a cheap pair of tiny needle nose vice grip pliers off of Amazon and then used them to clamp onto the spring clamp and fully "open" it. That way, you just have to maneuver it onto the right place and hit the release. I seriously spent like 30min trying to get that one clamp on before I thought of that. Another thing: I also swapped my radiator and my heater control valve at the same time. Not super expensive, and while you have all of the coolant out...
Thanks for sharing all your tips. I was real careful with the oil cooler installation, but I could see how easily the gasket could become displaced while you're in that tight and uncomfortable area trying to get it reattached to the block.
I like the needle nose vice grips idea. I'm giong to have to remember that one for sure.
Yeah, there are definitely associated things to replace as part of this job. If you haven't checked out our Complete Coolant Hose Replacement video, you should check it out. It covers all the coolant hoses except the upper and lower radiator hoses. th-cam.com/video/vCRzbacvp6A/w-d-xo.htmlsi=XXrE_2rJyRTwVKHA
@@TimmyTheToolman I will! I just saw that while I was at work today and will check it out. Thanks for all of the great content!
@@toastrecon My pleasure!
thank you for the vid man! i was dreading this job because the entire bottom of my engine block is caked in oil. Loved the jokes throughout the video too, they were pretty funny.
You're welcome. I'm glad you appreciate the humor.
Mines was like that. I had an oil leak from the valve cover gasket. I finally had that taken care. I used the Gunk engine degreaser. That stuff works well. Warm your engine a bit before using it. I recommend driving to some self service car wash place and spray the engine degreaser on and then use the pressure washer. If you do that at home it will stain your driveway.
I have 463k miles on my '98 with a V6. I better go inspect the hoses for the oil cooler. Thanks for the video and keep enjoying your retirement.
@marvinshorty4611 Yeah, you definitely got your life out of those hoses. I think the hoses can last a very long time, provided you renew the coolant on a regular basis.
I am enjoying my retirement. Thanks!
Never knew we had an engine block coolant drain. Thanks
You're welcome.
Great video. When I replaced the oil cooler oring on my 4runners, I was able to loosen and torque that bolt from wheel well. It was easier for me than going underneath.
Thanks
MikeM
Thanks Mike. I liked the additional leverage I gained from using the breaker bar and torque wrench from under the rig.
Great video, and Tim Thank you for getting a “that’s what she said” in there!
Thanks! I always like when people pay attention to what I'm saying and acknowledge the potty humor I throw in from time to time.
I had to change my oil cooler before this video came out. It would have bee a lot cooler if I had. (Matthew McConaughey voice) Love the videos! (My voice again)
@renecruz2842 Matthew McConaughey in Dazed and Confused. We're glad you liked the video.
Excellent, thank you.
Thanks and you're very welcome.
Great video
Thanks!
@@TimmyTheToolman almost 100k 😱 congrats
@@sheerwillsurvival2064 We'll hit 100k about this time next year. We seem to gain around 10k subscribers per year.
I saw a trick where you compress those clamps and put a zip tie on it to hold it open, then slide wherever you want add cut zip tie.
Also, do you think you would have been able to install the new oil cooler hoses to the cooler before rebolting it to the block?
Thanks for these awesome vids!!!
@dongriffith7069 That's not a bad idea. Another guy mentioned he used a needle nose vice grips to hold the clamp compressed.
As for pre-connecring the hoses to the cooler, I think that would make it awkward to get the cooler reattached to the block without displacing the oil cooler gasket. One guy reported that he made a huge mess because the o-ring became displaced when installing the oil cooler, and he didn't realize it. When he started his rig, oil went everywhere.
@@TimmyTheToolman They do make red sprayable gasket holder. I used it for my Camaro valve covers. Just spray and let it tack up. Install the gasket and less worries when you go to invert the cover. I think it's permatex spray tack.
@@frankmaggio4328 Interesting, If you have a link for that product, please provide it.
Tim - I have a leak from the oil cooler so going to end up replacing all the coolant hoses while I’m at it thanks to your other kick ass video on all the coolant hose replacement. Question - does it make sense to just replace the oil cooler itself? I have 215k miles in mine and it’s 25 years old but don’t know if the oil cooler is a “wear” item worthy of just replacement. Thanks
Nah, I wouldn't replace the cooler. I think it's highly unlikely that the cooler would fail in any way. I've never heard of one failing.
Great vid as always, 96-98 model year spec’s green ethylene glycol, 99-02 model spec Toyota red, I actually prefer the green as many of my red rad fluid Toyotas including the 5vz have experienced corrosion between water pump and t-stat among other locations that have leaked the red fluid in any amount.
Thanks. Interesting comment about the coolant. I've seen the opposite with more corrosion from green coolant compared to red. I wonder if it's more of a situation of how often the coolant was renewed. Old coolant becomes more acidic.
I did this a while ago on my 3rd Gen 2WD and I was confused why you are taking off so much stuff to get to it all I took off was my skid plate and I had direct access to it but I forgot you guys are working on a 4wd truck. Much less space in there 😂
Yeah, we don't work on 2wd models very much. Sean and I only own the 4wd versions and most of the people we know have 4wds also.
Hey Tim. I have a 2002 Toyota Tacoma. Oil cooler is leaking. Should I do what yall did in the vid and replace the seal and the washer on the bolt and the hoses or should I save my money and buy a new one. ????
Those oil coolers aren't known to fail. I'd just replace the gaskets and hoses.
Do you think that unbolting the oil cooler will give more access for freeing long hose clamp?
@@maralynthomson4375 I don't think so because that smaller u-shaped hose won't allow you to move the cooler very far.
Was this preventative maintenance on this rig? Have you heard of these hoses breaking?
Yes preventative maintenance, and I have heard of these hoses failing along with the oil cooler developing an oil leak.
Green anti freeze ???
Cool! Get it lol.
I believe new clamps from Toyota are held open with a clip, may be an option?
@kdmtmb7657 That might make it easier to get the new clamps in place, but it takes a decent amount of force to pull the retainer free of the new clamp, which might be problematic in such a tight space.
Tim.... You didn't give other options to this job. To wit....When do you HAVE to do this job vs when you can do watchful waiting. I have a 260 K 4R almost identical to yours with all original everything when I bought it. I have replaced coolant hoses that were old and bulging. I have no oil leaks from the cooler and no coolant leaks from the hoses. The hoses are old but look and feel fine. This is a bear of a job which I would like to defer as long as possible. Another option might be to mount a remotely mounted oil cooler. Your thoughts?
@cal48koho Well, when to do the job might be forced upon you like one of the hoses burst or the oil cooler develops a bad oil leak. This was done as preventative maintenance to avoid a bad situation. At your mileage, it's not a bad idea to just get it done. It's entirely up to you.
I think I've heard of some guys mounting a cooler someplace else, but I've never seen how they did it and don't have any personal experience with it
i replaced my gaskets on my 99 taco back in april but didnt see that bracket at 8:15 on my engine/truck. is that an automatic transmission thing?
@@rats0fft0ya It probably is an automatic transmission model thing. That would make sense since you don't have it on your manual.
I scrapped the 3.0 oil cooler and gonna do the same on my 3.4 swap. You just need the oil filter fitting , screw it in, screw on a 2nd oil filter, use long hose to the u shape hose end on the block. Scrap that useless cooler! Your welcome!
Now, you say useless, but how do you know that? Have you taken oil temperature samples before and after the delete of the cooler? The engineers who built the engine seemed to think it was necessary. I know engineers don't always get things right, but I'm going to side with them on this one unless you have something scientific to prove what you're saying is true, that they are useless. Transmission oil coolers cooled with engine coolant certainly work to keep transmission temps down. Why wouldn't they do the same for the engine oil? Plus, now you have a 2nd oil filter you'll need to replace at certain intervals.
Have your ever had an issue with the block drain not sealing when closed? I'm doing my timing belt next week and removing the radiator and replacingn the coolant. I'm terrified the block drain won't seal when closed because it's 22 years old and never opened.
@scotto3826 I've opened and closed the block drains on several of these engines, and I've never had one leak after closing it. If it did happen, I suppose it could be an easy fix of cleaning out any sediment and then putting the block drain bolt back in. I wouldn't worry about it.
This job looks like a royal pain in the ass. Clamps and bolts in tight areas sucks. Great video and tips like usual.
@@timryan4711 Yeah, it's definitely a pain in the arse.
C'mon Tim, she's never said "its pretty tight in there".....lol
Yeah, probably not.
@@TimmyTheToolman you probably said "It's loose in there!"
🇺🇸 🫡 🇺🇸
Great video
Thanks Antonio!