Advice - Additional Parts - Timing Belt Change

Greetings everyone. In the next couple of weeks I'll be replacing my timing belt and all the associated parts, I've purchased all the parts that's in this link:

https://adventuretaco.com/guide/ste...r-3-4l-v6-5vzfe-also-4runner-tundra-and-t100/

My question is, for those of you who have done this, what additional parts have you replaced while you're in there? So far I went ahead and ordered both upper and lower radiator hoses and new overflow coolant tank.

Are there any other parts, especially plastic retainers or clips I should get that have a good chance of breaking or other parts that are easy to get to while I have all this stuff disassembled?

The one clip that looks like it might be brittle (260k) is the clip that holds down the camshaft sensor, but I can't seem to find that clip/retainer itself, I can only assume it might come with the sensor itself.

Any tips or suggestions are much appreciated.

 

Did you get the job done yet? I'm getting ready to do it also, along with a new fan clutch bracket, oil pump, oil temp sensor, service the oil cooler, etc...mine has 383,000 miles with a lot of leaks though. You figure out any other parts to swap while you're in there?

 

Good question. I have not done it yet as I wanted to take a Friday or Monday off work so I wouldn't be rushed and easier on this old body. The only other parts I've ordered thus far was a new fan clutch, and fan blade...they're both probably fine, but they weren't that much and I figured they do such a good job cooling the engine it's worth replacing (260k). Also, if you replace the fan clutch, if you have a towing package, aka 3.4L like it looks you do, you'd want the fan clutch with the green ring, it's more heavy duty or something.

I've been contemplating doing the oil pump/cooler as well after watching a video the other day and would make sense to do that then (Timmy Tool Man video). I don't have any leaks up front, so I haven't made that decision atm...but if I do, I'd probably take the opportunity to drop the pan, clean it up and re-seal it.

Outside of potentially doing the oil pump, I might throw in a new harmonic balancer...ultimately I wanna make sure the weather is nice in case I can't get it done so if I have to ride the motorcycle into work I'm not doing it in the rain.

 

Getting ready to do mine as well. Would be nice to know what else to replace while there. The new harmonic balancers is $$$$ for OEM, I looked into that. Good idea on the radiator hoses.

 

Yeah I watched Tim's video also, decided I better just go the extra step and pull that diff and do the oil pump. I'll have to check the fan clutch I bought to verify it's the right one. But yeah, I'm really busy with work and kids, it'll likely be spread out over a couple weeks for me. I have other rigs to drive. I thought about the harmonic balancer but damn they aren't cheap

 

Yeah I'm seeing about $215, at yoyashop. Would be a shame if it failed after all that work

 

Nice, that's much better than I found at toyotapartsdeal.com It is $515 there.

https://www.toyotapartsdeal.com/oem...(1=5VZFE;5=ATM;6=4FC;8=XTR;0=VZN170L-CRPDKAB)

 

Ya the "crankshaft pulley / damper" isn't cheap...it's $510 on the Toyota Direct site I've been using to buy most of my OEM parts, plus the always have a 5% discount you can apply, and I found out the other day after leaving something in my cart but not going through with the order, they sent me an email for 7% off, which would essentially bring it under $500 and/or cover shipping...we'll see, I'm pretty sure I need a steering rack as well so I'm trying to balance (no pun intended) where the money is going. I'm going to do a little more research, but more than likely if I do end up getting one, it will be OEM, it's just such an integral part I'm not conficent on other brands, although it's possible they would be just fine. Unfortunately I'd like to inspect it first before I order one, and to really do that properly I'd like to have the whole thing off and see what shape the rubber insert (or whatever it is) is in.

 

I would get a 12" long 1/4" extension and a 1/4" swivel 10 mm socket so that you can get at the tensioner bolt on the passenger side. Something like in the link below. It was a nightmare trying to get access to it with my 3/8" extension, 3/8" swivel with a 10 mm connected to it. Double check my work on 10 mm being the bolt size for the tensioners.

https://www.gearwrench.com/all-tool...0256-14-drive-6-point-metric-flex-socket-10mm

 

Cam and crank seals while you’re in there.

 

Check the idler pulley for your AC compressor. You've got 95% of the work in replacing done, give it a spin and see if it grinds (mine did).

 

ugh
I’m having PTSD after u said cam seals


Was tracking down oil leak after Subaru SB install. Above pix is after 2 TBelt changes
only good thing to come out of the debacle….i can change a EJ25 T belt in 2.5hours(not including draining coolant)

Freakin 8 T belt installs done till I discovered mech did not RTV cam carriers

 

Lil tech tip IF you RR cam/crank seals…


Instead of trying to pry seals out an potentially scratching cams, this is my method
Center punch seal
Gently screw in a wood screw
Then pry out seal with angled needle nose pliers

for installation
Clean surfaces
Apply small amount of assembly lube to outside of seal surfaces
Use a PVC pipe cap($2 at Home Depot)
To tap seal into place evenly

mine used a 1 1/4 end cap

 

The one part I didn't change that should've been done, is the timing cover gasket, and make sure you don't lose any of the bolts for it.

 

Honestly it doesn’t appear that it is even worth replacing these seals. I tried finding examples of them actually leaking and have so far found none. I didn’t touch mine when doing the timing belt and water pump,

 

That's not a bad idea...I just looked that up and it appears there are 3 different ones listed, so I'll have to do a little research on them, but each of them are only like $8 somehow, which we all know is rare not to have something so overpriced.

 

Hopefully someone smarter than me will chime in. But I believe that timing cover gasket is not one piece.

 

On your 3.4L
The T cover gaskets just cushion the plastic cover(s). They don’t really do anything
The T belt is outside the engine oil compartment

On 2/3rz
T cover gaskets prevent oil from leaking
The T chain is inside engine oil compartment
Lucky for u! It’s a BIG job getting T cover off. Think book time 9.8hrs
Took me 4 days…..no oil leaks now!