Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Tech Tips/DIY/How To

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 11-26-2013, 08:32 PM
Member
My Jeep: 2014 3.6L WK2
 
Join Date: Apr 2013
Posts: 103
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 676
Stevm65 has a reputation beyond reputeStevm65 has a reputation beyond repute
Cold Startup oil flow

I sometimes have to let my 2014 Limited 3.6 sit in the garage for a couple of days without starting it. The push button start is new to me and it bothers me a little that it starts so fast,like half a turn, and goes to a high idle; especially in the winter. I'm sure that everything is working properly, and it's engineered to run like that, but I almost wish that it would crank a little and get the oil pumped around and up to the top of the engine. I guess I'm showing my age. When cars had automatic chokes, in the winter I'd crank it a bit before setting the choke and letting it start. Any ideas, suggestions?
__________________

__________________
Reply With Quote
  #2  
Old 11-26-2013, 08:35 PM
bill_de's Avatar
Premium Member
My Jeep: 2014 5.7L WK2
 
Join Date: Sep 2012
Posts: 6,178
Thanks: 318
Thanked 346 Times in 302 Posts
Rep Power: 1801666
bill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond repute
Re: Cold Startup oil flow

Press the button and let it do its thing.

I do wait until the rpms get down to 1,000 or less before moving. That's probably old fashioned also.


---
__________________

__________________
If you need a shoulder to cry on ...

... pull over to the side of the road!

Reply With Quote
  #3  
Old 11-26-2013, 08:46 PM
zeprider25's Avatar
Member
My Jeep: 2005 5.7L WK
 
Join Date: May 2013
Location: Fort Lewis, WA
Posts: 309
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3783
zeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond reputezeprider25 has a reputation beyond repute
Garage
Quote:
Originally Posted by bill_de View Post
Press the button and let it do its thing.

I do wait until the rpms get down to 1,000 or less before moving. That's probably old fashioned also.

---
i always do the same
__________________
2005 Jeep Grand Cherokee Limited 5.7L Hemi -- Black Ops CF Venom Hood and Headlight Covers, Mopar CAI, DS Predator Tuner, Catch Can, SRT8 Grill, SRT8 Front Bumper, SRT8 20" Rims, SRT8 Bilsteins Shocks, SRT8 Bwoodys springs, SRT8 Front and Rear Swaybars, SRT8 Roof Rack, SRT8 Pedals, 08 RER Mygig, Lockpick Adaptor, 6k HID LowBeams, LED Highbeams/Fog, LED Interior more to come

2011 Jeep Patriot Limited - Wife/Babymobile, LED Interior, Lockpick v4
Reply With Quote
  #4  
Old 11-26-2013, 09:13 PM
jbjones85's Avatar
Premium Member
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: Feb 2012
Location: Raleigh/Durham NC
Posts: 987
Thanks: 34
Thanked 102 Times in 90 Posts
Rep Power: 2436
jbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond reputejbjones85 has a reputation beyond repute
Same here. Let them drop below 1k before putting into gear. Remote start helps with this also.
__________________
Reply With Quote
  #5  
Old 11-26-2013, 09:44 PM
Premium Member
My Jeep: 2014 3.6L WK2
 
Join Date: Mar 2013
Posts: 77
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 643
SLLJG is on a distinguished road
Re: Cold Startup oil flow

At the next oil change, specify synthetic 0W-20 oil because it flows more easily at low temperatures and resists high temperatures better.
__________________
2014 Jeep Grand Cherokee Overland 3.6L 4x4; Quadra-Lift II; Off-Road Adventure II; Advanced Technology Group; Vesuvio Indigo Blue interior; white exterior; engine block heater; CD Player. Nokian Rotiiva AT tires.
Built April 2013. As of September 21, 2014, the Jeep has been driven 33,000 miles (55 000 km).

No end of troubles with UConnect!
Reply With Quote
  #6  
Old 11-26-2013, 09:50 PM
Member
My Jeep: 2014 3.6L WK2
 
Join Date: Apr 2013
Posts: 103
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 676
Stevm65 has a reputation beyond reputeStevm65 has a reputation beyond repute
Re: Cold Startup oil flow

Thanks for the input. That helps. When I bought the Jeep they gave me 6 free oil changes. The deal is that the dealer uses a semi-synthetic oil unless I want to pay extra. I would ordinarily run a full synthetic and do it all myself. The dealer insisted that the semi was fine, but you're right that a lighter weight full synthetic would get up to the heads faster. I like the idea of the dealer doing the oil changes for warranty purposes. I thought that the 0-20 might be too light. It calls for 5-20 and doesn't mention 0-20 as an option. Have you run 0-20? Maybe next time I'll see how much extra they want or just buy my own syn oil when I bring it in. And what's with putting the oil filter upside down on top of the engine?? Could they get it any further from the oil pump? I've got to think that no matter what kind of a check valve there is, it drains down eventually.
__________________
Reply With Quote
  #7  
Old 11-26-2013, 10:30 PM
xJoshxx's Avatar
Premium Member
My Jeep: 2012 6.4L WK2
 
Join Date: Mar 2011
Location: Burlington,KY
Posts: 814
Thanks: 30
Thanked 25 Times in 21 Posts
Rep Power: 72515
xJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond repute
Re: Cold Startup oil flow

Have you ever looked at the Oil pressure of a 3.6 when she starts? Mine in the winter with the standard 5w30 oil would hit 88PSI idle. the 3.6 oil pump is a BEAST. my 6.4 doesn't hit 88.
__________________
2012 Grand Cherokee SRT8
Reply With Quote
  #8  
Old 11-26-2013, 10:33 PM
Member
My Jeep: 2014 3.6L WK2
 
Join Date: Apr 2013
Posts: 103
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 676
Stevm65 has a reputation beyond reputeStevm65 has a reputation beyond repute
Re: Cold Startup oil flow

that's nice to know, makes me feel better, thanks
__________________
Reply With Quote
  #9  
Old 11-26-2013, 10:43 PM
xJoshxx's Avatar
Premium Member
My Jeep: 2012 6.4L WK2
 
Join Date: Mar 2011
Location: Burlington,KY
Posts: 814
Thanks: 30
Thanked 25 Times in 21 Posts
Rep Power: 72515
xJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond reputexJoshxx has a reputation beyond repute
Re: Cold Startup oil flow

Quote:
Originally Posted by Stevm65 View Post
that's nice to know, makes me feel better, thanks
From http://pentastars.com/ FYI more info than you will ever need on the 3.6

Quote:
A chain-driven, vane-type variable displacement oil pump adjusts the flow rate and pressure as commanded by the engine management system, which uses a solenoid to drive the pump into low or high pressure mode. For example, below 3,500 rpm, the pump conserves energy by using low pressure; at speeds over 3,500 rpm, the pump switches to high pressure.

A force balance mechanism inside the oil pump adjusts the size of the pumping chambers to alter oil flow. If the oil is cold, the pump reduces the size of the internal chambers. When the oil is hot and thinner, more oil is needed, and a spring increases the size of the pump chambers. This also saves energy.

The pump is driven at a 1:1 drive ratio; its location under the block is more efficient than an on-crankshaft location. An internal, mechanical ball-and-spring relief valve dumps oil into the sump when needed, for conditions such as a cold start with high engine speed. Both pump and pressure regulation solenoid are non-serviceable.
__________________
2012 Grand Cherokee SRT8
Reply With Quote
The Following User Says Thank You to xJoshxx For This Useful Post:
  #10  
Old 11-27-2013, 12:12 AM
Member
My Jeep: 2012 3.6L WK2
 
Join Date: Aug 2011
Location: Castle Rock, CO
Posts: 605
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 381814
Aiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond reputeAiyer has a reputation beyond repute
Garage
Re: Cold Startup oil flow

I usually start the Jeep (most of the time remote start) just before I let my dog back inside the house. Give him his treat, pet him and walk to the garage and get in the Jeep. By then, most of the time, it has idled down.

Other times, I start the Jeep and sit in it until it idles down to below 1000 rpm. Usually takes only about 30 secs.

I start driving and try to keep the rpms below 4k until it is all warmed up. I have been doing this on all my cars for years....

Cheers,
-A
__________________
2012 Jeep Grand Cherokee Limited
2008 Porsche Cayenne S
2002 Aprilia SL1000R
2000 Porsche Boxster (Sold)
1998 Jeep Grand Cherokee SE (Sold and still missed)
Reply With Quote
  #11  
Old 11-27-2013, 02:05 PM
Member
My Jeep: 2014 3.6L WK2
 
Join Date: Apr 2013
Posts: 103
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 676
Stevm65 has a reputation beyond reputeStevm65 has a reputation beyond repute
Re: Cold Startup oil flow

I think what was bothering me the most was using the blended oil last time. Some information indicated that there could be as little as 10% synthetic in the blend. I originally thought that it was more like half. I do believe that the synthetic will move faster on cold starts and cling better on shutdown. Anyway,the dealer said that they would use any oil I wanted as long as it met specs, so this morning I bought some Pennzoil full Synthetic 5w-20 and they did the labor and filter per the service contract. I think that was the best overall solution for me.
Thanks for all the information from everyone
__________________
Reply With Quote
  #12  
Old 11-27-2013, 02:28 PM
Premium Member
My Jeep: 2014 5.7L WK2
 
Join Date: May 2013
Location: Colorado
Posts: 2,377
Thanks: 31
Thanked 80 Times in 73 Posts
Rep Power: 43824
lstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond reputelstowell has a reputation beyond repute
Re: Cold Startup oil flow

Quote:
Originally Posted by Stevm65 View Post
Thanks for the input. That helps. When I bought the Jeep they gave me 6 free oil changes. The deal is that the dealer uses a semi-synthetic oil unless I want to pay extra. I would ordinarily run a full synthetic and do it all myself. The dealer insisted that the semi was fine, but you're right that a lighter weight full synthetic would get up to the heads faster. I like the idea of the dealer doing the oil changes for warranty purposes. I thought that the 0-20 might be too light. It calls for 5-20 and doesn't mention 0-20 as an option. Have you run 0-20? Maybe next time I'll see how much extra they want or just buy my own syn oil when I bring it in. And what's with putting the oil filter upside down on top of the engine?? Could they get it any further from the oil pump? I've got to think that no matter what kind of a check valve there is, it drains down eventually.
I'd expect a decent oil to try to stick to "stuff" for a few days, but if you regularly leave it parked for longer periods and are nervous, look for a battery or externally powered oil circulator accessory.

I also get nervous about the high rpm it starts with even when its colder than $!$$@ outside. I suspect they may know something I don't, but it still makes me cringe.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Puff of smoke on cold startup. Rich Lee Engine Performance/Intakes/Exhausts 1 10-09-2013 12:49 AM
05 GC Hi-Flow Cat creativeblendz Engine Performance/Intake/Exhaust 3 07-11-2013 10:51 PM
Load squealing on startup when very cold out pameyer Troubleshooting/Problems 1 01-30-2013 09:41 AM
Reduced A/C flow BackwoodsBarbieJeep Troubleshooting/Problems 15 12-29-2012 12:11 PM
High flow cat? Marbs Grand Cherokee - WK 2 06-30-2010 09:41 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:10 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community