97 CRV close to OverHeating with Full Radiator !
Thread Starter
Honda-Tech Member
Joined: Mar 2012
Posts: 10
Likes: 0
97 CRV close to OverHeating with Full Radiator !
So I have a 1997 Crv. B20, all stock nothing special.
I have owned it for a year now.
Everything has worked perfectly up until about a month ago.
The Temp Gauge on the inside of the car has always sat at half way between hot and cold. (I feel that’s a little high but that’s where it has been ever sense I got it.)
About a month ago after sitting in atleast a hour of traffic, getting close to home at a stop light the Temp Gauge started rising. So I check the radiator once it was cool, it wasn’t empty but wasn’t full. I probably put 2 cups of coolant in and it was full. So thinking it was just a air bubble I shrugged it off.
The next day the same thing happened. Hour of traffic and almost home gauge started rising. So I check coolant and it’s low again. So thinking I have a leak I check hoses and everything. Hoses were fine and everything seemed fine except very small maybe crack on the plastic part of the radiator. Only reason I found it was there was moisture around the crack and no were else.
So I bought a brand new radiator and changed the thermostat while there wasn’t coolant in the motor. I was also going to hardwire the fans to always be on while the car was running. But found that only one fan worked (used multimeter to check voltage to fan) so pulled the nonworking fan and tossed it.
Now about a month later after a hour drive the gauge starts rising but stops at 3/4 to hot. So I rush home and right when I start up from a stop it’ll slightly rise and while on the interstate the gauge drops to normal position.
I checked the radiator hoses while the car is on and both top and bottom hose are hot and pressurized.
I check the coolant overflow and it has coolant in it, and the radiator also has coolant.
So I am baffled at what is making the temp gauge rise !
Could it really be that I’m only running one cooling fan ?
Does having a second fan really make that difference ?
anyones opinion is appreciated !
Thanks.
I have owned it for a year now.
Everything has worked perfectly up until about a month ago.
The Temp Gauge on the inside of the car has always sat at half way between hot and cold. (I feel that’s a little high but that’s where it has been ever sense I got it.)
About a month ago after sitting in atleast a hour of traffic, getting close to home at a stop light the Temp Gauge started rising. So I check the radiator once it was cool, it wasn’t empty but wasn’t full. I probably put 2 cups of coolant in and it was full. So thinking it was just a air bubble I shrugged it off.
The next day the same thing happened. Hour of traffic and almost home gauge started rising. So I check coolant and it’s low again. So thinking I have a leak I check hoses and everything. Hoses were fine and everything seemed fine except very small maybe crack on the plastic part of the radiator. Only reason I found it was there was moisture around the crack and no were else.
So I bought a brand new radiator and changed the thermostat while there wasn’t coolant in the motor. I was also going to hardwire the fans to always be on while the car was running. But found that only one fan worked (used multimeter to check voltage to fan) so pulled the nonworking fan and tossed it.
Now about a month later after a hour drive the gauge starts rising but stops at 3/4 to hot. So I rush home and right when I start up from a stop it’ll slightly rise and while on the interstate the gauge drops to normal position.
I checked the radiator hoses while the car is on and both top and bottom hose are hot and pressurized.
I check the coolant overflow and it has coolant in it, and the radiator also has coolant.
So I am baffled at what is making the temp gauge rise !
Could it really be that I’m only running one cooling fan ?
Does having a second fan really make that difference ?
anyones opinion is appreciated !
Thanks.
Honda-Tech Member
Joined: Oct 2018
Posts: 13
Likes: 0
Re: 97 CRV close to OverHeating with Full Radiator !
I think the thermostat is directional and if I remember correctly there is a mark that should be at the top when installing. Not sure where you live, but here in Texas to combat the high air temps, I've been running straight distilled water in mine with a bottle of redline water wetter. Temperature never climbs above half. Next month before it gets cold I'm going to move over to a 50/50 coolant mix for the winter.
You can find Water Wetter at most major auto parts stores for about $10.
May also want to heck to see if the pusher fan in front of the radiator is working. This usually comes on when running the a/c to help get more airflow across the radiator.
You can find Water Wetter at most major auto parts stores for about $10.
May also want to heck to see if the pusher fan in front of the radiator is working. This usually comes on when running the a/c to help get more airflow across the radiator.
Fish Twig
Joined: Nov 2005
Posts: 15,554
Likes: 309
From: Still hunting that foo up there
Re: 97 CRV close to OverHeating with Full Radiator !
bleed coolant system, the fan system needs to come on on its own so look into the cooling fan relay system and fan switch o the thermostat housing, clock and install the thermostat properly, combustion test cooling system,
Thread
Thread Starter
Forum
Replies
Last Post
96_coupe
Honda Civic / Del Sol (1992 - 2000)
40
Apr 2, 2012 10:35 AM
4doorH22
Road Racing / Autocross & Time Attack
18
Jan 19, 2002 01:06 PM