Join Date: May 2006
Location: Grand Forks, ND
Slightly slower crank time wouldn't be unusual. More than just a little slower crank time would maybe lead to following a couple of things below.
Load test your battery to make sure it is up to snuff. If it is not up to snuff look at a Sears Platinum group 34R instead of the Red Top factory battery. Cycle your glow plugs twice in real cold weather before hitting the key to start. If you have doubts that your glow plugs are working properly, have them checked. There is a upgraded version with a different voltage if needed. Use your block heater (on a timer), every CRD has one.
Good idea to run 8~10 oz or so of Power Service with every tank of fuel to lessen any chances of gelling issues in colder months. I also run 4 oz of synthetic 2 stroke oil (like Super Tech from small mart) in every tank - as ultra low sulfur diesel fuel has been around since 05 or 06. I'm sure by now you are already running winter grade fuel.
Hope this might be of some help.
05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015