When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hey there guys! This is my first post here, and I apologize if this is in the wrong section. To me, a thermostat is external but I could have misunderstood.
I’ve been having issues keeping my turbo 4.8 cool. I have a 25.5”x12.5” (core size) aluminum radiator in the car, and two new Hayden 12” fans mounted flush to it in push configuration. It’s at an angle, and sits behind the intercooler. The intercooler is large, but I have an air dam setup to pull air into the middle of the intercooler and radiator when at speed.
I can see coolant flowing with the rad cap off. The fans move a lot of air. I’ve run these fans on other projects and have had great experiences with them. The car has always, painstakingly, slowly crept up in temp. Idling or driving, hasn’t ever mattered. I built a fresh air system for the radiator and it didn’t change a thing. Not even marginally- so I got to thinking, and pulled the thermostat. I remember looking at it and thinking that it was oddly long and had an extra plate near the end, gave it a little squeeze, and it collapsed a bit with a pretty good snap. I figured that while I was there I’d try running the car with no thermostat to see if it made a difference, and nothing. Not a bit, same exact thing. Slow rise in temp, about the same rate.
Does that plate at the end separate cooled fluid from hot? How does that system work in these motors? I don’t have my heater core lines looped, I have them capped. This is definitely a different t-stat than I’m used to, with that extra plate on the bottom. I’m about to go heat up a pan with the thermostat in it, seeing is believing and I have no clue if I just have been battling a bad “new” thermostat.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coolant Thermostat Operation Questions 
