Overheating
#1
Overheating
Last summer my 99 SE started to run hot when on the highway. I turned the A/C off, and slowed down which brought the gauge down some, but it was still hot. I topped up the coolant reservoir and hoped for the best. Throughout this winter the temp gauge at it's normal mark.
Today, the weather has been very warm, and my temp gauge went up, and the coolant overflow overflowed.
The car an auto, has 100kms (62,000 miles) and the coolant was flushed and changed by the dealer two years ago.
I'm guessing thermostat first. Is this a DIY job?
Anyone have any other suggestions?
Thanks for your input
Today, the weather has been very warm, and my temp gauge went up, and the coolant overflow overflowed.
The car an auto, has 100kms (62,000 miles) and the coolant was flushed and changed by the dealer two years ago.
I'm guessing thermostat first. Is this a DIY job?
Anyone have any other suggestions?
Thanks for your input
#2
Re: Overheating
Originally posted by d_hammmer
Last summer my 99 SE started to run hot when on the highway. I turned the A/C off, and slowed down which brought the gauge down some, but it was still hot. I topped up the coolant reservoir and hoped for the best. Throughout this winter the temp gauge at it's normal mark.
Today, the weather has been very warm, and my temp gauge went up, and the coolant overflow overflowed.
The car an auto, has 100kms (62,000 miles) and the coolant was flushed and changed by the dealer two years ago.
I'm guessing thermostat first. Is this a DIY job?
Anyone have any other suggestions?
Thanks for your input
Last summer my 99 SE started to run hot when on the highway. I turned the A/C off, and slowed down which brought the gauge down some, but it was still hot. I topped up the coolant reservoir and hoped for the best. Throughout this winter the temp gauge at it's normal mark.
Today, the weather has been very warm, and my temp gauge went up, and the coolant overflow overflowed.
The car an auto, has 100kms (62,000 miles) and the coolant was flushed and changed by the dealer two years ago.
I'm guessing thermostat first. Is this a DIY job?
Anyone have any other suggestions?
Thanks for your input
#3
Member who somehow became The President of The SE-L Club
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Posts: 16,033
Has the thermostat ever been changed before? When thermostats get weak your car runs cold. *** UNLESS IT'S INSTALLED BACKWARDS!! ***
Be carefull here, check the direction your thermostat is installed. It should upon with the flow, not against it. If it's installed backwards, when the spring gets weak, it cannot open against the coolant flow anymore. If it's in correct as the spring gets weak, it opens to fast and you run cold.
Be carefull here, check the direction your thermostat is installed. It should upon with the flow, not against it. If it's installed backwards, when the spring gets weak, it cannot open against the coolant flow anymore. If it's in correct as the spring gets weak, it opens to fast and you run cold.
#4
Originally posted by njmaxseltd
Has the thermostat ever been changed before? When thermostats get weak your car runs cold. *** UNLESS IT'S INSTALLED BACKWARDS!! ***
Be carefull here, check the direction your thermostat is installed. It should upon with the flow, not against it. If it's installed backwards, when the spring gets weak, it cannot open against the coolant flow anymore. If it's in correct as the spring gets weak, it opens to fast and you run cold.
Has the thermostat ever been changed before? When thermostats get weak your car runs cold. *** UNLESS IT'S INSTALLED BACKWARDS!! ***
Be carefull here, check the direction your thermostat is installed. It should upon with the flow, not against it. If it's installed backwards, when the spring gets weak, it cannot open against the coolant flow anymore. If it's in correct as the spring gets weak, it opens to fast and you run cold.
#5
Member who somehow became The President of The SE-L Club
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Join Date: Jun 2001
Posts: 16,033
Originally posted by Stephen Max
The thermostat I bought from the dealer came already installed in a new housing, so it's not possible to install it backwards.
The thermostat I bought from the dealer came already installed in a new housing, so it's not possible to install it backwards.
![got me](https://maxima.org/forums/images/smilies/ne_nau.gif)
The housing is part of the engine block. Unless Nissan uses some very off the wall thermostat setup. I'll have to take a peak in my Haynes manual 2nite.
#6
Thermostat can also get stuck in closed position. This way the coolant doesn't flow, resulting in overheating. To test, remove thermostat, place in water, bring to a boil and see if it opens completely. If it doesn't, replace.
#7
The thermostat housing is held onto the block with three nuts. The thermostat is an integral part of the housing, it must be changed as a unit.
It is not necessary to remove anything to get at it and remove it. Just take of the hose and remove the 3 nuts and it comes off very easily. I had mine off today when I did my flush.
It is not necessary to remove anything to get at it and remove it. Just take of the hose and remove the 3 nuts and it comes off very easily. I had mine off today when I did my flush.
#8
Member who somehow became The President of The SE-L Club
iTrader: (19)
Join Date: Jun 2001
Posts: 16,033
Originally posted by Jime
The thermostat housing is held onto the block with three nuts. The thermostat is an integral part of the housing, it must be changed as a unit.
The thermostat housing is held onto the block with three nuts. The thermostat is an integral part of the housing, it must be changed as a unit.
![Big Grin](https://maxima.org/forums/images/smilies/biggrin.gif)
#10
Thanks for your input guys
The thermostat is the original part since day one.
I called a dealer. They said CDN $45 ( USD $30 ) for the thermostat. The parts wholesalers didn't have a listing for the stat, so I'm guessing from the price that it includes the housing and stat
Would there be any other reason that the car overheats on the highway?
The thermostat is the original part since day one.
I called a dealer. They said CDN $45 ( USD $30 ) for the thermostat. The parts wholesalers didn't have a listing for the stat, so I'm guessing from the price that it includes the housing and stat
Would there be any other reason that the car overheats on the highway?
#11
Originally posted by Jime
The thermostat housing is held onto the block with three nuts. The thermostat is an integral part of the housing, it must be changed as a unit.
It is not necessary to remove anything to get at it and remove it. Just take of the hose and remove the 3 nuts and it comes off very easily. I had mine off today when I did my flush.
The thermostat housing is held onto the block with three nuts. The thermostat is an integral part of the housing, it must be changed as a unit.
It is not necessary to remove anything to get at it and remove it. Just take of the hose and remove the 3 nuts and it comes off very easily. I had mine off today when I did my flush.
d_hammer: If your car is overheating on the highway, the first and cheapest thing to do is change the thermostat. Well, the first thing to do is check to make sure you've got plenty of coolant and don't have a leaking hose, but I assume you've done that already.
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