Why is my Duramax LLY overheating at 50 mph?
The fan clutch on that old gasser would never engage at speeds above 50 MPH, even in the hottest ambient temperatures and towing the heaviest loads. Above that speed, there was always enough airflow over the radiator to keep the engine quite cool.
What happens when a Duramax engine goes down?
Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.
When did the General Motors Duramax engine come out?
Duramax is a series of turbo-diesel engines produced by General Motors for use in pickup trucks, SUVs and vans. First introduced in 2001, Duramax engines range from four, six and eight cylinders in inline (I) or V configurations. A total of 11 Duramax engines have been produced since 2001 globally, including:
Can a GMC one ton engine overheat?
But I had experienced better: that 1980 GMC one-ton. It never overheated once, under any condition. I was already aware of a GM service bulletin (06-06-04-036D) addressing overheating in extremely hot ambient temperatures. The bulletin applied to all 2004 and 2005 LLY Duramax engines.
What causes a Duramax diesel engine to heat up?
When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp.
What should the transmission temp be in a Duramax?
If you own a 2001-2004.5 LB7 Duramax your normal operating temperatures will run around 160-180 degrees. These transmissions will warm up when towing or driving in the summer months. 200-225 is very common when the ambient air temp is 80-100 degrees and your transmission is under an increased load.
What kind of transmission does a Duramax diesel use?
It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.
What’s the problem with the Allison Transmission 1000?
What Might be Wrong with Your Transmission 1 Limp Mode (Allison 1000 Model) The Allison transmission 1000 model has a feature called “limp mode”, in which the… 2 Hooked Up Incorrectly It’s also possible that the transmission itself is just fine, but was installed incorrectly. If… 3 TCM Module Recall More