I don't understand how the engine is cooling if the thermostat is closed? I feel like we must be missing something here. Man, that's a new one on me.
Operation Lipstick on a Pig
- Thread starter fleming442
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Yup, above 40-50* or so, heat works and engine comes up to t-stat temp as normal (around 190*). Heat works, electric fans work, everything is good.... Let the temp drop below that, and stuff gets squirrelly. Temp gauge stays low and no heat....
I even pulled the t-stat last night to make sure it wasn't stuck open, and it was good. I got to thinking about it, and backflushing the heater core won't do anything since it's ambient air related. I guess it just becomes a VW in cold weather?
I even pulled the t-stat last night to make sure it wasn't stuck open, and it was good. I got to thinking about it, and backflushing the heater core won't do anything since it's ambient air related. I guess it just becomes a VW in cold weather?
It's 50/50ish mix with Prestone.
Haven't heard the fans when it's cold. It did the same thing last year. Maybe I should build a belly pan...... 🤔
Haven't heard the fans when it's cold. It did the same thing last year. Maybe I should build a belly pan...... 🤔
im telling you
its just how these GM engines are
I have 3 of them for daily drivers all do the same thing
it usually gets warmed up as your pulling up to your destination!!
its just how these GM engines are
I have 3 of them for daily drivers all do the same thing
it usually gets warmed up as your pulling up to your destination!!
Yeah, it's jacked up. 35* on the way home from work, drove 45 minutes at sub 155 temps, stopped at schleven, get back in, and it's up to 190 from heat soak. By the time I drove home, about another 10 minutes, it was back down to 155-160ish.
I think I'll book an appointment at the UMD wind tunnel to do some testing......🙄 don't I wish
I think I'll book an appointment at the UMD wind tunnel to do some testing......🙄 don't I wish
Does your thermostat have one of those engineered holes in the diaphragm that allows water to pass when closed?
It's a $43 fah king Motorad from NAPA. When it works, it works great- rock steady. b*tch just don't work in the cold.
But, yeah, it has a bypass hole with a little loose valve type doohickey in it.
If the 3800 is made with a water pump bypass hose, you can go to a solid diaphragm thermostat to get less loss to the radiator. Although, you could use a restrictor fitting on that hose to help more.
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