HELP! 1JZ overheating in boost
Thread Starter
Driver
Joined: Mar 2009
Posts: 161
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From: bc
HELP! 1JZ overheating in boost
My 1JZ start overheating while in boost the other day so I did a coolant flush. It drives fine below 4k rpm, but as soon I give it a bit of gas it overheats. Temp gauge goes to H and coolant boils over with steam spewing out.
Water pump and thermostat is fine, no leaks on the rad or the hoses.
Sounds like a clogged radiator?
Water pump and thermostat is fine, no leaks on the rad or the hoses.
Sounds like a clogged radiator?
I would imagine if the radiator was clogged it would overheat all the time. When's the last time to thermostat was replaced?
How many miles or kilometers on this car? Might want to have a dealer perform a leak down test on it.
how do you know the water pump and thermostat are fine?
How many miles or kilometers on this car? Might want to have a dealer perform a leak down test on it.
how do you know the water pump and thermostat are fine?
Thread Starter
Driver
Joined: Mar 2009
Posts: 161
Likes: 1
From: bc
I would imagine if the radiator was clogged it would overheat all the time. When's the last time to thermostat was replaced?
How many miles or kilometers on this car? Might want to have a dealer perform a leak down test on it.
how do you know the water pump and thermostat are fine?
How many miles or kilometers on this car? Might want to have a dealer perform a leak down test on it.
how do you know the water pump and thermostat are fine?
The coolant flushed out was really rusty and full of debris.
Going back tomorrow, most likely a clogged rad.
91 Soarer with 89k KMs
Lexus Test Driver
Joined: Aug 2007
Posts: 927
Likes: 3
From: Ca
Remove your radiator, soak some vinegar in there for a couple days, then stick a garden hose on the inlet under high pressure and let it run for 10 minutes.
Reinstall the radiator and see if anything changes. Since your in BC I would say stick with the 50/50 mixture but you may want to consider red line water wetter...it will reduce temps by about 10* or so.
If that doesn't help, get a new radiator, new thermostat, and new water pump. It will defiantly cost you a lot less than having to change a head gasket and milling a warped head due to overheating which is whats going to happen if you keep running it like that (if it already hasnt happened).
Overheating is my worst fear....ive messed up a couple motors like that in the past and its no fun.
Reinstall the radiator and see if anything changes. Since your in BC I would say stick with the 50/50 mixture but you may want to consider red line water wetter...it will reduce temps by about 10* or so.
If that doesn't help, get a new radiator, new thermostat, and new water pump. It will defiantly cost you a lot less than having to change a head gasket and milling a warped head due to overheating which is whats going to happen if you keep running it like that (if it already hasnt happened).
Overheating is my worst fear....ive messed up a couple motors like that in the past and its no fun.
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Thread Starter
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Joined: Mar 2009
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From: bc
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