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[3.6L] What’s Your Cold Weather Startup Procedure?
- Thread starter Rubicon6MT
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desert or beach people 
2021JeepGladiator
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Oil temperature is the most important. In the manual you see a chart with the oil temperature and the ideal max rpm. I normally wait 100F on the oil before to drive....and live in South Florida.
DanW
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Jeeps heat up to 100 pretty quickly. My Vette, however, would have a long wait. It's got a very efficient oil cooler and takes a good bit of easy driving to get it up to and over 100 degrees. I always wait until the oil is 185 before pushing it hard. Same with the Jeeps. But they do get there much more quickly.
In fact, if one of my Jeep's oil temp is 20 degrees, it will still reach 100 much more quickly than the Vette does starting at even 60 degrees. (Vette is always in the garage.) Of course, the Vette is running thicker oil that also contributes to the slower warm-up.
I forgot to mention....my Wrangler has an engine block heater. It's going to be outside this winter (along with the JT) because my Vette, boat, and wife get the garage. I will be plugging it in on cold nights if I'm driving it the next day. The coolant and oil stay at a nice 60 degrees when it is plugged in, no matter how cold it gets. I've done it as low as 10 below zero. It's a nice thing to have.
It was part of the cold weather package when the JL first came out. They stopped including it after about the first two months of production, so I got lucky. I wish my JT came with one.
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DanW
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You can. Not sure what is involved with it. The climate here makes it likely not worth it. It's more of a Great White North thing. Not really necessary here, especially when the 0w20 oil flows at 40+ below zero. LOL.
Years ago, I saw where you could buy one that was just connected to a magnet with the cord coming out of it. You put it on the oil pan and just plug it in and it heated the oil. It's been many years since I saw that, though.
WILDHOBO
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If a diesel I can see it for the glow plugs, but I agree completely for a gasser. Not worth it unless you’re in really cold climates.
ShadowsPapa
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My neighbor lit a charcoal fire in a pan under his tractor and then put a tarp over the tractor...................
You used to have to do that (MANY years ago) for the rear axles of tractors otherwise the bull gear wouldn't turn in the thick lube and you had problems getting the tractor to move.
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Stan H
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I have seen some diesel trucks when it was very cold in Winter up here require a tarp and a turbo heater to get started . Mostly because they are grid heater type. . Lol funniest thing I ever seen was a diesel repair service for the railroad was trying to start a dump truck we had and one of his crew did not know it was a grid heater and pulled the air cleaner and sprayed a bunch of ether in it . Hit the starter and cranked it and the grid heater ignited the ether and it blowed the head off the block.
This has been years ago at the time I think the damage was 7,000k probably be 3 times that now .
Edit: we didn't know what we heard till the boss came in pissed off and told us what they did
This has been years ago at the time I think the damage was 7,000k probably be 3 times that now .Edit: we didn't know what we heard till the boss came in pissed off and told us what they did
Usmcsparky
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I always prime the oil filter on the first start of day or after setting for 4 hrs or more. Keeps from dry starting the engine and destroying the cams and related parts.
ShadowsPapa
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Funny shit right there
Stan H
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Absolutely
% funny . But still the same time it's exactly what Baxter is trying to convince everyone of.
ShadowsPapa
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About all that accomplishes is running the batteries down farther - and we know Jeeps do a poor job at keeping them charged unless you drive frequently and for long periods of time. You sort of ensure the batteries are never fully charged, cutting battery life.Absolutely
And if you are observant at all, you see these have oil pressure pretty much from the time they take off on their own and the crank cycle is done. Dry start has become a buzzword on the internet and most of these things come from people who have never opened up an engine in their lives, let alone understand how the 3.6 systems work.
I guess "if it feels good, do it", but that's about it, and we'll come back in a year or so and ask "how are those batteries doing, eh?"
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