How do you start a Duramax in cold weather?

8 tips for starting a Powerstroke, Cummins, or Duramax diesel in the cold

  1. TEST YOUR BATTERIES.
  2. CHANGE YOUR FUEL FILTER(S)
  3. CHECK THE GLOW PLUG OR GRID HEATER SYSTEM.
  4. CHECK YOUR COOLANT FREEZE POINT.
  5. USE A BOTTLE OF FUEL ADDITIVE.
  6. CHECK TO MAKE SURE YOUR BLOCK HEATER IS WORKING.

What temp should my LLY Duramax run at?

Registered. subscribed. Mine runs 165-190. That’s in 50-80* weather.

Is the lly a good Duramax engine?

Similar to the LB7, the LLY Duramax is reliable, powerful, and lacks most of the emissions found on modern day diesel trucks like the L5P. LLY Duramax trucks don’t suffer from the same injector failure problems that LB7 trucks frequently had. Instead, many LLY Duramax problems stem from overheating.

Why is my LLY surging idle?

Fuel Pressure Regulator (FPR) is a device that is in charge of making sure the rail pressure is where it should be. Using a scan tool you can compare desired and actual rail pressures to often determine if there is a problem. If the engine is surging at idle (RPM fluctuations) it is a good indicated of a bad FPR.

Why are diesels hard to start in the cold?

Metal cylinder walls become very cold when the temperature drops, so most vehicles are harder to start in cold weather. Because diesel engines require much higher temperatures to fire the fuel, they’ve always been harder to start in cold weather than gasoline-powered vehicles.

What is normal operating temp for Allison Transmission?

180-200 approx
Normal operating temps will range from 180-200 approx. 100 degrees above ambient air temps. These transmissions will run from 200-230 in the summer months when towing in hilly areas. These temps are normal and will not hurt the transmission.

How hot is too hot Duramax?

250* for the “hot” engine warning. 255* for the “very hot” engine warning. As far as the tranny, you are not going to hurt an allison by running it hot.

What is bad about LLY Duramax?

Head Gasket Failure is more common the LLY Duramax than any other Dmax generation. This is largely due to the huge factory turbocharger and overheating issues caused by a poor cooling system.

What causes a Duramax to idle rough?

Rough idle can be caused by bad engine mount– exhaust contacting the frame, bad injector, or weak cylinder compression.