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78 Brat normal operating temp - see pic
Posted 13 July 2010 - 11:04 PM
The next hurdle is to tackle the overheating problem that I've known this car had since day 1.
Now.... keep in mind.... I've discovered that the previous owner was a MORON when it comes to cars, so I started with the most obvious first.
last night, I removed an old arctic inline heater that I have no idea if it worked, and I figured it could be acting as a clog... so I removed it and replaced it with some brand new heater hose.
Also changed out the thermostat.... ops check good today.... no leaks anywhere. filled it up with coolant..... and let her run at idle in my garage.
and she's running beautifully if I may say so
..... 25 minutes later of just idling..... this is what my temp gauge looks like.
It "seems" a bit high.... but I've never owned a brat.
Does this look right to you after 25 minutes of idling in 75-ish degree outdoor temps..... or do I still have an overheating problem?
If so.... suggestions on the next thing to check???
Posted 14 July 2010 - 05:32 AM
1. Make sure the fan is cycling on and off.
2. Check radiator at radiator shop and or replace. (cheap)
3. Try synthetic oil
4. Lower the temp outdoors!
5. Gauge inaccuracy
6. Water pump full of sediment.
Posted 14 July 2010 - 07:40 AM
My fan doesn't "cycle" at all..... it's like a flex fan.... directly connected to the pulley.... spins as fast as the motor does.
I'm thinking maybe do a chemical flush of the coolant...... and then maybe install an aftermarket electrical fan, on it's own separate switch/curcuit so I don't have to tap into the existing "touchy" electrical system.
Edited by ninefourteener, 14 July 2010 - 09:08 AM.
Posted 14 July 2010 - 11:59 AM
See pic below of my old '78 Brat... The canister looking deal at the very bottom of the pic is the motor for the electric fan
Posted 14 July 2010 - 02:23 PM
...... No electric fan either
..... at all - LOL
I'll take a picture this afternoon when I get home and see if I can't get pointed i the right direction
Posted 14 July 2010 - 07:47 PM
All Subarus have the electric fan. I think I have the stock fan, the shroud and the brackets if you need them.
Edited by SUBARU3, 15 July 2010 - 08:45 AM.
Posted 14 July 2010 - 08:15 PM
Here's my engine bay.... notice the complete LACK of any sort of electrical fan - LOL
I'm assuming that bracket over on the driver side is an overflow tank?? Or at least where one is supposed to be????
Does anyone have any pics of what it is SUPPOSED to look like?
Posted 14 July 2010 - 09:18 PM
no "overflow" tank until gen3
the bracket is for the jack
only time mine read higher is when it was 1/2 gallon low of coolant
I added a vw diesel coolant tank when I did the engine swap
refer to picture @ http://www.pixbox.se/pic_show_id30699044.html for "normal" gauge positions
this picture was taken before purchase, much cleaner now!
Posted 15 July 2010 - 12:18 AM
And that DEFINITELY explains the overheating problem...
I just bought a twin electric fan kit, with a relay and sensor...... I'm going to mount one of them as a puller in the stock location..... and the other one as a pusher on the front driver side of the radiator. That will keep this damn thing cool.
Just paid for it 10 minutes ago.... it's on it's way here.
Question..... where is the best place to mount the temp sensor?? Any suggestions?
Posted 15 July 2010 - 04:36 AM
It'll be in an easy place to work on, and I believe there is a spot to mount it,
but don't quote me on that one, its been a while since I owned a gen 1.
Or, you could just wire in a switch in your cabin.
I know there are a lot of places to mount a switch in those cockpits.
I run one of those on my gen 2 on the stock fan, it should work just fine on
your aftermarket setup.
And for either application, make sure you get your polarity right, as that will
affect your fans' direction of rotation.
Posted 15 July 2010 - 08:49 AM
Trying to avoid a cockpit switch though... with a temp sensor and relay.. don't need to.
Any other suggestions?
Posted 15 July 2010 - 08:51 PM
Also, since you don't have an overflow bottle, make sure you only fill the radiator up until it covers the tubes inside, no more then that. If you fill it up beyond that, it'll purge the overflow onto the ground and thats no bueno.
Posted 16 July 2010 - 12:36 AM
If it doesn't.... and if it supposed to serve as a temp sensor for my non-existent electric fan, then I'll definitely use it.
What controls the gauge in the car?
Posted 16 July 2010 - 09:10 PM
Posted 17 July 2010 - 01:36 PM
Should be here tuesday
Posted 20 July 2010 - 10:16 PM
Busy day today..... Installed a new water temp sensor, a new dual-electric fan kit, aftermarket fan relay, and a circuit breaker to keep the whole thing safe.
Ops check.... perfect.... comes on at 190 degrees.... turns off at 175
Didn't have room to run both fans on the back side of the radiator, so I ran a "stock location" fan on the passenger side, and then an additional fan on the front of the driver side. I backwards-wired the front fan to serve as a "pusher" while the one behind the radiator maintains the stock "puller".
New water temp sensor
My Frankenstein wiring job. Believe it or not, it's "over-safe"
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