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Engine / Re: Toybrota's 22R build
« Last post by Gillesdetrail on Today at 04:26:43 PM »
On my 20/22r, the first time I ran it I had a 22re thermostat which was I think 195f, and the temperature would fluctuate up to 210f which I thought was a little high too. Someone correct me if I'm wrong but I believe the 22r uses a 185f thermostat. Since I put that in the temperature stays at 185f-190f on the road and rarely above 200f even in the trails in the summer. I do have a taurus electric fan with an adjustable controller that turns on at 200 or so
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Engine / Re: Toybrota's 22R build
« Last post by Toybrota on Today at 04:23:51 PM »
When taking the truck out, the temp was fine and then immediately went up to above 220 while driving. The needle was also very shaky. I'm guessing the damn gauge is broken, there's no reason that I can think of that would lead this engine to run this damn hot, especially when it's 55 out and it's moving.

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Engine / Re: Toybrota's 22R build
« Last post by Toybrota on Today at 03:08:59 PM »
Just got off the phone with Wes over at LC engineering. He told me it's completely normal for the engine temp to fluctuate from 180-210. Makes sense, this is about the operating range.

My gauge never goes above 210. I'll just drive the truck and see. I expect it won't climb above 210 if it hasn't. I'll just start driving and enjoying it!

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Engine / Re: Toybrota's 22R build
« Last post by Toybrota on Today at 03:07:30 PM »
22re Performance
dual stage OE thermostat

This is a factory thermostat that was created to solve a certain cooling system problem on 22r/22re called "temperature overshoot". It's still a 190 degree thermostat like the original, but it has a second, smaller wax slug to help out under certain circumstances.

ready? OK, time to get get bored.... Sometimes when using the heater, the interior fan will drop the temp of the coolant below normal operating temp. The "cooled" water that just came out of the heater core then travels past the thermostat causing the thermostat to close, because it "thinks" the coolant needs to get back up to normal operating temp. This causes your temp gauge to show overheating or wild fluctuations.

So, as you can see, it's a pretty specific problem that it's trying to solve. As a daily driver, without this issue, I still recommend the regular OE thermostat I sell. If you are having this above issue, this could be the fix for it.

I've been hesitant to add this to the site only for the reason I didn't want people buying it for the wrong reasons (thinking it'll fix their faulty cooling system). You guys are smart enough to know when you need it, so I'll leave it up to you.


I have a copy of the TSB from the 80's if anyone wants to see the Toyota technical side. (bestGen)
The overshoot is what I've thought it might be. I'll have to invest in the later model thermostat.

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Engine / Re: Toybrota's 22R build
« Last post by :)bestgen4runner on Today at 02:04:22 PM »
22re Performance
dual stage OE thermostat

This is a factory thermostat that was created to solve a certain cooling system problem on 22r/22re called "temperature overshoot". It's still a 190 degree thermostat like the original, but it has a second, smaller wax slug to help out under certain circumstances.

ready? OK, time to get get bored.... Sometimes when using the heater, the interior fan will drop the temp of the coolant below normal operating temp. The "cooled" water that just came out of the heater core then travels past the thermostat causing the thermostat to close, because it "thinks" the coolant needs to get back up to normal operating temp. This causes your temp gauge to show overheating or wild fluctuations.

So, as you can see, it's a pretty specific problem that it's trying to solve. As a daily driver, without this issue, I still recommend the regular OE thermostat I sell. If you are having this above issue, this could be the fix for it.

I've been hesitant to add this to the site only for the reason I didn't want people buying it for the wrong reasons (thinking it'll fix their faulty cooling system). You guys are smart enough to know when you need it, so I'll leave it up to you.


I have a copy of the TSB from the 80's if anyone wants to see the Toyota technical side. (bestGen)
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New Member Check-In! / Re: New Member 85 Runner
« Last post by TheMadRedneck on Today at 02:02:57 PM »
Thanks
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New Member Check-In! / Re: New Member 85 Runner
« Last post by cbeers on Today at 01:21:39 PM »
you don't need new wheel hubs.
i upgraded rotors and calipers on my 85 4runner
https://www.marlincrawler.com/brake/brake-combos/brake-caliper-and-rotor-combo

fyi there can be clearance issues between caliper and wheel depending on backspacing etc.

CB
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New Member Check-In! / Re: New Member 85 Runner
« Last post by TheMadRedneck on Today at 01:20:37 PM »
Can I reuse my hub from my 85 4 runner?
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Engine / Re: Toybrota's 22R build
« Last post by Toybrota on Today at 12:28:49 PM »
Straight from the FSM:

in regards to the thermostat

Valve opening temperature: 86 90 C (187 194 F)

It fully opens at 212. I've never seen it go past this. Which I'd say is good, it means that the thermostat fully opens and circulates coolant.
Before I swapped intakes, the upper rad hose would be nearly rock hard, now it's soft.
I'd be hard pressed to find air in the system, I jacked the front up high and ran it for 20 mins with the funnel connected. And a few minutes after shutting it off at idling temp, I could remove the rad cap. It wasn't hot at all. Interesting.


I love figuring this stuff out.

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