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Based on other threads I have read in the Gen3/4 forum, this wouldn't be the first time. Unless you bought an OEM one. If not, try OEM.
However, what you're explaining doesn't make any sense to me. How can the heat move to the top of the radiator but not into the radiator? Is there any coolant in the radiator? Is the cooling system holding pressure? When you squeeze the top hose, is it hard to squeeze? Or does it collapse easily like there's no pressure?
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2000 Toyota Camry LE (Japan made) i4 5S-FE 367,000+ miles.
Based on other threads I have read in the Gen3/4 forum, this wouldn't be the first time. Unless you bought an OEM one. If not, try OEM.
However, what you're explaining doesn't make any sense to me. How can the heat move to the top of the radiator but not into the radiator? Is there any coolant in the radiator? Is the cooling system holding pressure? When you squeeze the top hose, is it hard to squeeze? Or does it collapse easily like there's no pressure?
Replaced Thermostat twice. Also, it cannot be installed backwards due to the shape of the housing.
The heat buildup in the cylinder head is moving along the upper hose. There is no plate or blocker (like a thermostat) regarding the coolant flow from the top of the radiator to the cyl head, so the heat transfers through the coolant without coolant movement.
Just think about opening a window in the wintertime versus keeping it closed. Eventually, the temp will equalize much faster because there is no window to block the transfer.
This is why the heat does not permeate throughout the mass area of the radiator immediately.... the flow is just not there.
Anyway, there is pressure building up in the hoses. I do not see any bleed off taps, and I've jacked up the front end in all directions to move air bubbles... if they existed.
This coolant issue is the first one in 20yrs that has me baffled. I've always had American nameplate vehicles, and this is my first Foreign nameplate vehicle. Nothing makes sense with this issue.
That's a weird one alright.
-Clogged coolant passages? Someone used too much aluma-seal or something? Have you tried a reverse flush?
-Blown heat gasket or crack in the block somewhere? It sounds like pressure from somewhere is keeping the coolant from circulating, (or a coolant passage is blocked). Pressurization from the waterpump is one way, and only 15 pounds at most, so that probably ain't it.
The only other thing that would make any other pressure in the cooling system is compression pressure, through a crack somewhere in the engine.
Last edited by AlmightyCamry777; 03-13-2010 at 10:17 AM.
Now, the fans will not kick on at all. But they work with the AC on, and they work when the radiator temp sensor is unplugged. New temp sensors on the waterneck at the cyl head.
Did you cut the t-stat center out? Why? With the coolant now free-flowing your car won't get up to proper normal operating temperature because the coolant will be cooling the engine when it doesn't need to. I think you may have had a bad t-stat to begin with.
Did you cut the t-stat center out? Why? With the coolant now free-flowing your car won't get up to proper normal operating temperature because the coolant will be cooling the engine when it doesn't need to. I think you may have had a bad t-stat to begin with.
Why?? To troubleshoot the issue. That's why. Now I know that the past 2 brand new thermostats I have installed have both been junk.
However, when it finally reached 75% on the gage, and the fans don't kick in at all.
I understand the concept of a cooling system. But right now, I am in troubleshooting mode. So-- could you please help me and tell me what the problem could be regarding the inoperative fans at 75% hot. Keep in mind that 1 of 2 fans work with the AC on... and both run at full speed with the sensor disconnected at the radiator.
Coolant sensor im'a guessin - some engines have more then one.
Brian79z i think you need to get access to a Toyota factory manual. Not Haynes, and not Chilton, Toyota factory.
They used to be downloadable in PDF, the link was in the stickies, in the General Camry forum of this site. The link may be gone now and i am too lazy to check. I downloaded the one for my camry long ago and
I have the cooling chapter in .pdf format and it is only about 400 kb, but the only one i have is for the 2002 2AZ-FE engine (the V6 cylinder for that year is called the 1FMZE i think). It has inspection of the parts and some troubleshooting of the thermostat, the cooling fans, the switches and the relays, it is 27 pages long.
If this is your engine or you think the information might help, and you cant find the chapter for your exact year engine elsewhere, pm me and i will email you the cooling chapter or any other chapter you think will help you PDF from the manual.
You can download a Toyota factory service manual for free at the top of the Camry forum over at AutomotiveForums.com. Download the generation 3 manual.
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