4g61t.org

It's been pretty cool here lately (30s and 40s at night), and for some reason, the temp gauge isn't moving into the middle range.

It IS moving...just barely. This has been going on for a few weeks now, and one day, when it was pretty warm out, the guage got to the middle. But since then, it's been cool out, and I've been seeing nothing but C.

Is it possible that the car just runs cool? I thought it was my coolant temp sensor (which had a somewhat loose connector). So I replaced AND the connector, and I'm still sitting on C.

FYI: I have a 89 Mirage turbo w/DSM sidemount, a bottle of Redline Water Wetter in the radiator, and alcohol injetion that starts spraying at 10psi.

If the car IS just running cool, is it unsafe for the car to be pushed hard while the guage is still on C? I'm obviously letting the car warm up, but it's just disturbing to be on C the whole time.

The car doesn't exhibit any other problems.

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1989 Mirage Turbo w/4G63T
1991 Mazda MX-5 (UK spec)
2018 Hyundai I30N

Change your T-stat!!!! Same thing was happening with my 1.5 car, new tstat, all better...

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91 Colt GL "dandelion demon"
92 Talon TSi AWD - winter beater

Love these smileys-

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Corey
90 C50 4G63 Swapped-Drag car
92 Eagle Talon Tsi AWD
96 Mitsu Eclipse GS-T
www.ongreenperformance.com
"Just like in the old days-More Horse Power means more crap to pick up-lol"

Yeah, you're thermostat is stuck open. Time for a new one.

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Jason Veraldi
Scammer
http://www.4g61t.org/forum/viewtopic.php?f=3&t=34532

Awesome. I'll call my buddy at NAPA right now. Thanks!

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1989 Mirage Turbo w/4G63T
1991 Mazda MX-5 (UK spec)
2018 Hyundai I30N

I have the same problem with the thermostat, can I just take out the thermostat and let the water flow direct to the engine..??

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4G63T - 95 Mirage Cyborg R
MODS : 255lph, SARD AFPR, NGK (spark plugs and cable), SSteel IC, FMIC, big 16g, TypeS BOV, MBC, 2.5" Exh (No cat)

Does it get cold there? I assume so? So if it does get cold its not suggested as the car has a harder time getting to operating tempature.

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Corey
90 C50 4G63 Swapped-Drag car
92 Eagle Talon Tsi AWD
96 Mitsu Eclipse GS-T
www.ongreenperformance.com
"Just like in the old days-More Horse Power means more crap to pick up-lol"

thanks for replying..if i dont use the thermostat it wont do any damage to my engine right??

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4G63T - 95 Mirage Cyborg R
MODS : 255lph, SARD AFPR, NGK (spark plugs and cable), SSteel IC, FMIC, big 16g, TypeS BOV, MBC, 2.5" Exh (No cat)

You'll probably need some sort of restriction in there so the coolant doesn't flow all the time through the head.

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Got rabies?

Crap, I thought I posted an update but I guess not:

I took off the thermostat housing, and what did I find? THERE WAS NO THERMOSTAT! Hahaha!

So yeah, if you run without a thermostat, your car will never get into the middle heat range when it's cold out. Pretty much anything under 50F.

$6 later, I put in a new thermostat and gasket, and the car runs perfectly.

Thanks for everyone's help!

ONE THING I NOTICED WHILE DRIVING AROUND WITHOUT A THERMOSTAT:
The car started misfiring under boost. It was exactly like when I had the stock heat range spark plugs in and started upping the boost. Going one heat range colder fixed it before...but this new problem was totally caused by the thermostat.

Since I've installed the thermostat, I've been able to run 13psi of boost again with no misfiring/pulled timing/other issues. So yeah, if your thermostat is bad, drop the $6 and buy a new one.

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1989 Mirage Turbo w/4G63T
1991 Mazda MX-5 (UK spec)
2018 Hyundai I30N

ok thanks for the info...

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4G63T - 95 Mirage Cyborg R
MODS : 255lph, SARD AFPR, NGK (spark plugs and cable), SSteel IC, FMIC, big 16g, TypeS BOV, MBC, 2.5" Exh (No cat)

Oopps !

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Geoff
2013 Genesis 5.0 RSPEC
88 Mazda Turbo II- LSX7
89 2.0 Turbo Colt
13 Ducati 1199 Panigale

Hahaha, don't sweat it bro. Car runs like a champ and you've thrown in more than enough parts for me to make use of. The flywheel and clutch are next!

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1989 Mirage Turbo w/4G63T
1991 Mazda MX-5 (UK spec)
2018 Hyundai I30N