Toyota Help

[Tarant]

Okay so we have a little 1994 Manual Toyota, 2wd, 2 door pickup with a 22R-E Engine. Well some friends used the truck and packed it down and over heated the engine. Well instead of pulling off to the side of the road and letting it cool they just kept driving.

Well they gave it back and never told us what happend, we used the truck and it over heated on us. So I replaced the coolant and it still overheats in like 15min of driveing, I looked at the manual and it was no help I have tried every thing and I have no clue what is wrong.

And one last thing I let the engine run for a few minutes and it overheated and the coolant was gushing out of a small yellow cap that was on a hose running to the back of the engine. It looks like a soda bottle cap exept the middle has been pushed out and that is were the coolant is gushing out of. So would I have to just replace that. or should I just leave it a lone.

Thanks

 

[olds97_lss]

It sounds like your thermostat is stuck... normally cost about $10 and it's also normally in the engine block where the top radiator hose connects to the engine. Not real hard to replace yourself, but make sure the engine is completely cool before messing with it.

I'm not sure what the yellow cap is... but I've changed quite a few thermostats and your over heating is indicitave of a dead one.

Or (worst case scenario), they blew the head gasket... Let the engine cool completely and check your oil. Make sure it's not over full. A lot of times, when a head gasket is blown, antifreeze is pumped into the crank case with the oil. If your oil is over full, it could be very bad news for the engine. It doesn't take a real long time to burn up the main bearings on an engine full of antifreeze... It only took my car about 4 days of sitting with antifreeze in the crankcase (not even driving) to make it knock like a diesel. That was a very expensive 4 days...

Let us know what happens!

 

[SMaxxin]

The yellow cap where it's overflowing is the overflow reservoir, you won't have to replace that. Follow the advise of Olds and report back.

 

[.30savage]

And one last thing I let the engine run for a few minutes and it overheated and the coolant was gushing out of a small yellow cap that was on a hose running to the back of the engine.

By the sound of your description...it sounds like your talking about a air conditioning hose..or heater core hose....and some have a small outlet on the line for mechanic shops to help get readings of pressure of the system......and when the tempature reaches a certian limit..it melts the lead bushing in the unit its self...causing a leak were you see it...

 

[itsme]

The little yellow cap is where someone has done a radiator flush on it, they spliced in a tee between your heater core and radiator to do so replace if water is gushing from it, also do as Olds has recommended, you can see if thermostat is bad by putting it into a boiling pot of water and if it dont start to open at its recommended temp its bad.

 

[.30savage]

don't they have thermo's that stay open when they go now?..kind of a overheating safety issue being addressed

 

[Badsneaker]

If they overheated this rig while towing, you could have:

blown head gasket.
blown fan clutch.
cracked head.

If the engine overheats when in traffic or stopped it may be a fan clutch. If it overheats no matter what, you may be looking at a head gasket problem or possibly cracked head.

You'll need to check the oil dipstick, make sure its not over-full like Olds said, also make sure the oil is not a milky color. Check for white smoke coming from tailpipe. I think the 22r is an aluminum head-not good for overheating.

The extent of the problem depends on HOW LONG they drove while it was overheating.

 

[Tarant]

Okay well I took the thermostat out since that was the first thing that was suggested, and i learnd somthing Craftsman Tools BLOW HARDCORE :madface: I swear they are as usless as those toy tools you buy for little kids.

Okay so I have the thermo out and I just have to know did I break 2 sockets and a screwdriver for nothing. The thermo is really orange and old but it is closed. is this normal.

 

[Got Nitro?]

First off,Take the broken tool's back to crafstman or sears,whoever carrys them,and for the thermo,It should be open.if it's not then you probablly need to replace it.

 

[Tarant]

Okay I will try that.

The thermo is closed and I did a test. The thermo has 195 stamped into the base which to my knowledge means it does its thing at 195 deg. (correct) well I put the old thermo into a pot of boiling water that was around 215deg and it never opened. So I am guessing it is toast. I will have to wait till tomarrow till a auto parts store opens and get a new thermo.

Hopefuly that is the problem.

One last thing I will be putting fresh coolant into the truck but i am not sure how much to put in. The directions on the coolant says do a 50/50 mix of coolant and water. and the manual says the total capacity for the cooling system is 8.9qt. Do I do 50/50.

Thanks to EVERYONE who helped.

 

[olds97_lss]

Closed is normal when it's cold. That's it's purpose. A thermostat keeps the antifreeze in the engine until it gets to a specific temp, then it lets fresh (cooled from the radiator) antifreeze flow through the engine.

Heat it up with a hair drier, it should open up around 160-180 degrees (I believe that's the temp range). If it doesn't open or if it's sluggish about opening, get a new one at napa or wherever you have available. Heat it with a the hair drier and compare prior to installing it. If yours reacts the same, then it probably isn't the thermostat. If it does react the same, get your money back before gunking it all up.

Did you check your oil to see if the level had elevated? It shouldn't be over full. If it is, you have bigger issues.

don't they have thermo's that stay open when they go now?..kind of a overheating safety issue being addressed

BTW, the last one I replaced was in a 1993 Toyota paseo. My wifes old car. It was sticking and spiking the temps. Then the temps would drop pretty drastically. I replaced the thermostat and all was well again.

If they overheated this rig while towing, you could have:
blown fan clutch.
If the engine overheats when in traffic or stopped it may be a fan clutch.

Does your truck have an electric radiator fan? I haven't seen a "clutch" driven fan in anything since the late 80's, but maybe sense it's a truck, it may still use one.

If it does have an electric fan, is it kicking in when it heats up?

EDIT:
Man... you replied while I was typing a stinking book!

You still need to do the 50/50 thing. Oddly enough, antifreeze becomes more stable when it's dilluted. It gets hotter before boiling and colder before freezing when mixed. Find a gallon bucket. Fill it half full with water, then half full with antifreeze. Use that to fill your radiator back up and fill the gallon jug you bought with water and you will have a 50/50 gallon on hand.

Also, now is the proper place and time to actually use that puretex high temp silicone gasket sealer that we've been using on our RC engines! Make sure that you use some and give it some time to cure. Especially if you damaged the gasket... unless the new thermostat comes with a new gasket... it's been so long since I've replaced one, I can't remember if they come with one.

 

[Tarant]

Thanks olds the thermo didnt open till about 210 it was sluggish and slow. and ever after I ran it under cool water is will not close.

The oil is just fine clean and not elevated.

And the fan is electric and runs when ever the engine is running,

Okay will do the 50/50 thing.

and I have the red stuff, I am guessing I need the black. also the thermo I have now has a gasket so i am hoping that replacement will. but if not I will get some sealer.

Thanks

 

[SMaxxin]

210 is probably the temp it should open at but it should close once it cools down. You can go to a cooler stat and it might help. I had the same problem in a Mazda, I dropped from a 210 to a 165 stat. It also had a small water leak from the front of the head, I put some Bar's radiator repair in it and ran it for another four year like that.

 

[Karl M]

If you have to smog test your car changing the temp of the thermostat could have an effect. Your engine has to run a 195 deg if that is what is called for or you may not pass. (personal experience talking) Good luck.