Another overheating thread, sorry.

Thanks for this info. It looks to be coming from the oil cooler nipple area (actually where it seals to the head). I have ordered a timing belt and water pump kit and will get it replaced next Wednesday.

Ugh!

Stepping back, is this believed to be the cause of the overheating? In other words it was running low on coolant due to the leak?

Side note --> Will you have the shop do it or are you going to tackle it yourself.

~Jason
 
Ugh!

Stepping back, is this believed to be the cause of the overheating? In other words it was running low on coolant due to the leak?

Side note --> Will you have the shop do it or are you going to tackle it yourself.

~Jason

When I bought the car I remember seeing drop of coolant coming off the skid plate, so I pressure tested the system. The system seemed to hold pressure, but the cap did not, so I replaced the cap and assumed that was the issue. I decided to flush the system to replace the old green stuff and that's when I started seeing the overheating. I just figured I had air pockets and the coolant was low because of that. Then I noticed the leak and here we are.

Going to get the shop to do the work. $300 for the labor and I bought an AISIN kit for about $250.
 
When I bought the car I remember seeing drop of coolant coming off the skid plate, so I pressure tested the system. The system seemed to hold pressure, but the cap did not, so I replaced the cap and assumed that was the issue. I decided to flush the system to replace the old green stuff and that's when I started seeing the overheating. I just figured I had air pockets and the coolant was low because of that. Then I noticed the leak and here we are.

Going to get the shop to do the work. $300 for the labor and I bought an AISIN kit for about $250.

Roger that, thanks. It needs to be fixed regardless. All part of the journey.

$300 labor sounds like a great deal. I am thinking of DIY myself, but if it's that low then I may rethink it. I haven't explored my options here in Austin.

~Jason
 
Roger that, thanks. It needs to be fixed regardless. All part of the journey.

$300 labor sounds like a great deal. I am thinking of DIY myself, but if it's that low then I may rethink it. I haven't explored my options here in Austin.

~Jason

I called 2 shops that are trusted locally. One shop is full of ex Toyota techs and quoted $700 for parts/labor/tax. The shop I went with is just down the street from my work and quoted $300 labor and parts will take the total to around $550, so I went with him. Good luck to you. For me, it was a no brainer to have a pro do it for $300.
 
Thanks for the insight. I agree with your decision.

Side note --> Couldn't encourage you more to change all coolant hoses while they are in there. Yes it will add more but really unless you have receipts for a recent change, it's just buying time. My 02 cents of course, worth what you paid for it. :-)

Jason
 
Thanks for the insight. I agree with your decision.

Side note --> Couldn't encourage you more to change all coolant hoses while they are in there. Yes it will add more but really unless you have receipts for a recent change, it's just buying time. My 02 cents of course, worth what you paid for it. :-)

Jason

All hoses would be: upper/lower rad hoses and both oil cooler hoses?
 
All hoses would be: upper/lower rad hoses and both oil cooler hoses?

Yes, those hoses for sure. There is a great thread on this, with part numbers that I will find and include. I used this list when I bought all my hoses.

Here it is --> What other hoses should I replace?

Again, I went there on mine b/c of the uncertainty around the new used truck and the desire to keep it "forever". I loath being stuck on side of road for something stupid (been there) + having to change "something else" every weekend. Buy once, cry once. But this all depends on your goals for the truck.

Many of the hoses will be very accessible during a timing belt change I believe.

~Jason
 
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The oil cooler isn’t a big deal to fix. You just have to make a little room inside of the fender area.

It’s like a $9 worth of gaskets. Two of them if I remember right when I did mine a few years ago. Just take the wheel off and remove the rubber liner cover.

Ifthe radiator is junky, just change it. It’s not even worth the fight. It’s Like $140. May as well back flush the heater cores also. They’re probably plugged up some. Check the heater shutoff valve also. They tend to corrode out.
 
The oil cooler isn’t a big deal to fix. You just have to make a little room inside of the fender area.

It’s like a $9 worth of gaskets. Two of them if I remember right when I did mine a few years ago. Just take the wheel off and remove the rubber liner cover.

Ifthe radiator is junky, just change it. It’s not even worth the fight. It’s Like $140. May as well back flush the heater cores also. They’re probably plugged up some. Check the heater shutoff valve also. They tend to corrode out.

100% agree.
 
100% agree.


The high placement of the heater valve is part of the problem of cooling system corrosion. The other part, oddly enough, is because these 4runners and 5vz-fe motors are so damn tough. Just unbelievably hearty. So much to the point that they actually tend to get neglected by owners.

It’s not a bad thing though, the more leaks the better when it comes to purchasing for me. #PRICEDROP!

OTC makes a really sweet back flush gun for cooling systems. After using that back flush gun the first time, and seeing how well it worked, I looked at it with lovingly eyes, and asked where have you been all my life…..
 
TB/WP job done yesterday. The tech said the water pump gasket was shot around the thermostat housing. He said it was a cheap paper gasket that failed. Hopefully I'm in the clear now. Thank you all for your contributions and suggestions.
 
The high placement of the heater valve is part of the problem of cooling system corrosion. The other part, oddly enough, is because these 4runners and 5vz-fe motors are so damn tough. Just unbelievably hearty. So much to the point that they actually tend to get neglected by owners.

It’s not a bad thing though, the more leaks the better when it comes to purchasing for me. #PRICEDROP!

OTC makes a really sweet back flush gun for cooling systems. After using that back flush gun the first time, and seeing how well it worked, I looked at it with lovingly eyes, and asked where have you been all my life…..

link to the one you like ?
 

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