Cold Morning Start Observations...

[LibertyTC]

The frosty fog moved in overnight and was about 23F outside where Jeep resides.
I guess the fog froze the door solid, cause opening it, I thought I tore the door seals.
Maybe next time, I should open it more gently and spray the seals with silicone spray ..soon!:icon_lol:

So I hop in, turn the key without starting it, and observe what kinda temperatures are now reading for water temps....
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I would have never thought that the strong-50c Hoat coolant would have been that close to freezing!
Even though I turn the key to on for 4 seconds to prime, does your Jeep hesitate to start, rpm's drop for a second, almost stall, before it gets going properly in these conditions?
Could it be it takes a second or two to build oil pressure, that may be causing the really noticeable hesitation, even with full synthetics?

Anyways, I timed how quick the jeep warms up too!
At idle now 3 minutes, reads 89.5F enough to turn on the defrost blower to High.
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A minute later, the windows are now getting defrosted, and dash temp is climbing nicely.
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By 8 minutes the temp gauge is at the 1/4 mark, where I feel comfortable enough to drive off, with good heat now !
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The Jeep defrost is very quick and the heat is great news!:gr_grin:

 

[dude1116]

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I would have never thought that the strong-50c Hoat coolant would have been that close to freezing!

The mixture ISN'T close to freezing. Antifreeze severely drops the freezing point of water when in solution.

Just because the fluid is cold and close to the freezing temperature of water, does not mean it's close to freezing.

I hate starting my Jeep in the cold. She clearly hates it. But she starts regardless. Power steering whines like a mother.

PS - which scanner are you using? Looking to get one for Christmas.

 

[CzarKJ]

I have a mild hesitation but nothing major. Like an extra second. Have noticed the Lady being a little more angry at me though after I get her started. Almost block heater season and all hesitation will go away!

 

[LibertyTC]

The Autel is listed in my signature line.
A few of us got these back in 2009, and nice cause they stay in Jeep with small footprint & show many extra gauges, turns off codes etc.
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There are lots of ok scanners for under $100 out there today.
Best to start a new thread, depending on features you need for a scanner, and see whats others may recommended for X-Mas.
Back on topic:
I should try this again & use the block heater for 5 hours to see if the starting improves any.

 

[M38 Bob]

"I would have never thought that the strong-50c Hoat coolant would have been that close to freezing!"

One can only hope that was meant in jest/sarcasm.

Bob

 

[Cardhu]

If you have the 60 40 mix of hoat, it won't freeze, not even at minus 33.7 F.

Mine start just fine at temps well worse then those. Its your HP powersteering hose that will blow before the engine temp even registers as a concern.

Right now mine stays plugged in till march and ps hose replaced with parker industrial high temp hose with 3/8 inch compression fittings.

 

[ltd02]

My KJ is pretty good until the teens. Then it's just that the PS makes all sorts of noises. No hesitation or RPM drop ever. I'm always amazed at how quickly I get heat compared to my other 4 vehicles. Seems like within a minute I can feel warmth from wherever the air is directed. Of course that's as long as my recently replaced bend door actuator holds up.

 

[profdlp]

My Jeep has never complained, even in sub-zero temps. Knock wood.

I remember my old Tracker on a -14F early morning groaning in pain all the way down the road. Weirdest noises I have ever heard from a piece of machinery.

 

[LibertyTC]

If yours run fine without hesitations or rpm's drops what's up with mine when it's slightly below freezing? :shrug:
It even had a good drive 18 hours previous, before it bogged out.
Next time the plugs are out, it is time for a compression check.
It could be that I have a weak coil or injector or IAC issue..who knows.
I did not long ago, over the slight engine shake, note a few misfires without codes set. I then also check the fuel pressure, vacuum and IAC on the shop's live data scanner.
Why do I get the feeling one day the MIL is going to hint what's really up with this jeep.
Maybe I should save up & ready myself for the parts cannon! :gr_grin:

 

[HoosierJeeper]

Mine fires right up, no hesitations at all. Bit of whining from the powersteering at first. Heat comes on quick. Coldest I've been in is -33. The power seat motors sound funny at that temp

 

[RenKJ]

No hesitation here, even in -35C, so might wana look into that

 

[Birdman330]

I just hate the knock that comes with cold temperatures on start up until the oil gets flowing.

 

[twowings]

Two words: BLOCK HEATER

 

[tjkj2002]

Two words: BLOCK HEATER

Grew up in a place were -35 degrees is common in the winter and never once needed a block heater.


Okay maybe my '75 Cutlass needed one(or 6) that was more due to having a Holly 1050 Dominator(no choke) and running 110 octane race gas.Run out in the -35 degree temps in boxers and boots,jump in and start it,hold at 3000rpm's for as long as I can stand it(5mins or so) slowly bring down to idle,hey it idles,get out run back in and as soon as I close the door it dies(only un-equal length long tube headers so very,very loud).




True story...........


My father used 15w-40 diesel oil in everything,I used 5w-30.One brisk morning(much colder then -35) he was out there trying to start his pickup with 15w-40 in it('85 F150,4.9 I6) and wouldn't even turn over even with a 1500cca battery that was brand new,jumped in my '84 F150(351W) with 5w-30 in it and it fired right up.I was on "car" starting duty in the winter till I left home 3 years later.Granted the farm equipment never was shut off from October till april so that was a major relief.

 

[Birdman330]

Grew up in a place were -35 degrees is common in the winter and never once needed a block heater.


Okay maybe my '75 Cutlass needed one(or 6) that was more due to having a Holly 1050 Dominator(no choke) and running 110 octane race gas.Run out in the -35 degree temps in boxers and boots,jump in and start it,hold at 3000rpm's for as long as I can stand it(5mins or so) slowly bring down to idle,hey it idles,get out run back in and as soon as I close the door it dies(only un-equal length long tube headers so very,very loud).




True story...........


My father used 15w-40 diesel oil in everything,I used 5w-30.One brisk morning(much colder then -35) he was out there trying to start his pickup with 15w-40 in it('85 F150,4.9 I6) and wouldn't even turn over even with a 1500cca battery that was brand new,jumped in my '84 F150(351W) with 5w-30 in it and it fired right up.I was on "car" starting duty in the winter till I left home 3 years later.Granted the farm equipment never was shut off from October till april so that was a major relief.

What's funny as hell, the Diesels yes U-Haul still had Diesels when I was working for them in the mid 2000's were rather finnicky, I had one at the station I worked at which was one stubborn mule in the good ways. It would be -20 out no block heater hooked up. Cycle the glow plugs a couple rounds and fired right up without a problem. They all ran 15W-40 as well, some other diesels wouldn't even crank with engine block heaters until I had them hooked up and jumped of the mule.

Funny story, one of those wet winters that year, so it snow, then partially melt and freeze since the temps wouldn't make up their mind. Well it of course was a good wet snow, some warmth the next day and of course then stupid freezing the next. So all the trucks were trapped, and I was using an pick to break the ice around the drive wheels of the trucks, then use another to pull them out. Of course I had to rent one of the 17 footers, on a Sunday busy day as always phone off the hook, people at the counter two of us working. Truck was for lack of a better term, sunken like the Titanic. I tried to see if I could get lucky and break it loose. No dice, customer was there watching me work in vain. I had lost it at that point, and a few days earlier we had a Canuck model come in, 93 F350 Powerstroke Turbo Diesel. That thing could yank the whole building off its foundation. It was time to use it rather than break my back. I got out of the truck told him I was going to get it out and started walking to the building. Customer points out if I want the ice pick. My response was instant ''Who needs an ice pick when I got a Powerstroke Diesel." His face lit up in surprise and said ''That will work.'' Came back out with the keys, fired that beast up backed it up to the truck, hooked chains up, told the customer put it in drive when he feels the yank floor it. Truck broke clean and got it underway.

 

[southernwake]

I am interested in seeing how the Jeep does this winter with cold starts since I have only had her a month or so. Being from the south we dont have to deal with the sub zero temps, if its single digits its really cold! Currently in PA due to work so its a slight climate change. My F250 will start on cold mornings but that block heater ( trans heater, oil pan heater as well) make it start much easier. And that remote start makes it really nice!

Andrew