Plastic cover on engine really needed? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum

Join Wrangler Forum Today


Like Tree23Likes
  • 1 Post By rhinorear
  • 2 Post By ssinga
  • 1 Post By SoDakSooner
  • 3 Post By jadmt
  • 1 Post By jwt873
  • 1 Post By Leadnut
  • 1 Post By Old Dogger
  • 2 Post By Lemotan
  • 1 Post By WillB
  • 1 Post By JHD1827
  • 2 Post By TerryC6
  • 2 Post By Mike-5
  • 1 Post By demarpaint
  • 1 Post By MRBachand
  • 2 Post By pkdailey4
  • 1 Post By Lemotan
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-27-2019, 10:08 AM
Thread Starter
  #1
Jeeper
 
Captain Skip's Avatar
 
Join Date: Aug 2019
Location: Live Free or Die
Posts: 55
Plastic cover on engine really needed?

I've seen several videos showing how to do different mechanical and maintenance tasks on the JK and noticed that there's a lot of of them where the plastic cover is no longer on the engine. I know on some it's for clarity of the video but is that cover really necessary in day to day operation? What purpose does it really serve? I don't know how much noise reduction it would offer but does it have anything to do with air flow over the engine? There was one on my FJ Cruiser too and I know a lot of people took them off and left them off on theirs.

Captain Skip is offline   Quote
Old 11-27-2019, 10:12 AM   #2
Jeeper
 
Join Date: Jan 2015
Location: lost causes nm
Posts: 693
Take it off and heat burritos
Captain Skip likes this.

__________________
When young people tell me about their problems I like to tell them that story about the time I survived without my cell phone and the internet for 40 years
rhinorear is offline   Quote
Old 11-27-2019, 10:20 AM   #3
Jeeper
 
ssinga's Avatar
 
Join Date: May 2014
Location: Alabama
Posts: 1,311
Quote:
Originally Posted by rhinorear View Post
Take it off and heat burritos
I like to cook the Screamin' Sicilian stromboli on the block. https://www.screaminsicilian.com/str...ano-stromboli/

I haven't had the engine cover on mine for years.
__________________
My JKUS Build 2012 JKU Sahara #777,820
ssinga is online now   Quote
Sponsored Links
Advertisement
 
Old 11-27-2019, 10:55 AM   #4
Jeeper
 
SoDakSooner's Avatar
 
Join Date: Jun 2015
Location: Okieland
Posts: 2,221
Nope just there to be pretty. Doesn't really even do anything but that. That said, I keep mine on because I am all about presentation...lol.
Captain Skip likes this.
SoDakSooner is offline   Quote
Old 11-27-2019, 11:03 AM   #5
Moderator

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
jadmt's Avatar
 
Join Date: Sep 2012
Location: missoula
Posts: 21,204
I think one reason it is there is to muffle the tick that 3.6's often have. it comes from valve clatter and from the injectors. I keep mine on because it keeps dust out the nooks and crannies on top of the engine area. easier to wipe the cover down than everything under neath it. Me likes a clean motor compartment
__________________
2018 Gobi Recon unlimited W/Mopar 2" lift coils combined with RK rear coils wedges, TF lower control arms, rear TF monster track bar and rear track bar bracket and Falcon 3.1 shocks, Cooper ST Maxx 315/75-17 on AEV Salta rims, Grabars, RE gas skid tank, mopar head liner, Warn VR10 and Maximus3 winch plate.
https://www.wranglerforum.com/f314/y...i-2192385.html
jadmt is offline   Quote
Old 11-27-2019, 11:12 AM   #6
Jeeper
 
jwt873's Avatar
 
Join Date: Jan 2017
Posts: 1,943
Quote:
Originally Posted by SoDakSooner View Post
Nope just there to be pretty. Doesn't really even do anything but that. That said, I keep mine on because I am all about presentation...lol.
Yes.. They're often referred to as beauty covers. Unlike in the old days, the top of modern engines are covered in a mess of wires, sensors and hoses so the cover makes things neater.

They are padded so as jadmt points out, they must reduce noise to some degree. I guess they also do a decent job of keeping dust and splashes off the top of the engine. Other than that, I can't see why they're needed.

I keep mine on too. It's no big deal to take it off and replace it.
Captain Skip likes this.
jwt873 is online now   Quote
Old 11-27-2019, 11:34 AM   #7
Jeeper
 
Leadnut's Avatar
 
Join Date: Mar 2016
Location: Arizona
Posts: 4,234
Plastic cover on engine really needed?

Not needed, but I donít have a good reason to remove it. Itís not like the engine is some masterpiece to look at.
Captain Skip likes this.
__________________
2014 JKU Willys 6-spd, RK X-Factor 3.5", Fox Resis, KM3 37s, PR60s, Eaton e-lockers, 5.13, Atlas II 3.8, and another $10K in miscellaneous parts.
Leadnut is offline   Quote
Old 11-27-2019, 03:36 PM
Thread Starter
  #8
Jeeper
 
Captain Skip's Avatar
 
Join Date: Aug 2019
Location: Live Free or Die
Posts: 55
Thanks all, more curious about it than anything else.
Captain Skip is offline   Quote
Old 11-27-2019, 04:48 PM   #9
THE GODFATHER

5-Year WF Supporting Member
WF Lifetime Member
 
Old Dogger's Avatar
 
Join Date: May 2012
Location: AZ. In the Ponderosa Pine Country, where the Bears are hungry..
Posts: 27,662
Mine went in file 13, as soon as I got it home.
pfleury32 likes this.
__________________
1974 CJ5, 2003 TJ, 2013 2 door Black Rubicon, auto, with 4.10 ratio.
Shaking at 40-70 MPH, Read this!!!

The Mighty Grizzly is not concerned,
with
the needs of the Hunter....


Click here and become a WF supporting Member
Old Dogger is online now   Quote
Old 11-27-2019, 05:52 PM   #10
Jeeper
 
Lemotan's Avatar
 
Join Date: Mar 2019
Location: California
Posts: 727
I keep mine, didn’t notice any temp improvements driving without and it quiets down the "sewing machine"
WillB and Captain Skip like this.
Lemotan is offline   Quote
Old 11-28-2019, 10:55 AM   #11
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 7,032
Yep mine is history, added something that might be useful instead:
Attached Thumbnails
Click image for larger version

Name:	IMG_0385.jpg
Views:	78
Size:	230.2 KB
ID:	4187931  
__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is offline   Quote
Old 11-28-2019, 06:53 PM   #12
Jeeper
 
WillB's Avatar
 
Join Date: Dec 2013
Location: Innisfil, Ontario
Posts: 579
I take my cover off long enough to detail the engine bay (hand wipe) then put it back on.
Attached Thumbnails
Click image for larger version

Name:	09BF102F-286F-44D9-B267-CE2BC5DADB43.jpg
Views:	54
Size:	232.7 KB
ID:	4187983  
Old Dogger likes this.
__________________


2016 JKU Sahara - Hydro Blue Pearl Coat - Freedom Top - Dual Top Group.
Ion Alloy Wheels wrapped with 275 65 18 Duratracs.
Factory 7 spoke - 255 70 18.
WillB is offline   Quote
Old 11-28-2019, 08:04 PM   #13
Jeeper
 
JHD1827's Avatar
 
Join Date: Nov 2018
Posts: 236
Quote:
Originally Posted by TerryC6 View Post
Yep mine is history, added something that might be useful instead:
What is that?

Sent from my SM-G973U using Tapatalk
trashmanssd likes this.
JHD1827 is offline   Quote
Old 11-28-2019, 10:26 PM   #14
Jeeper
 
YnotAJeep's Avatar
 
Join Date: Nov 2016
Location: La Verne, Calif.
Posts: 3,702
Its there to keep the engine dry if you check the oil in a downpour rain. It's also part of the smog device so you can't remove it. If you do remove it you will get better MPG and a lot more power. all LOL!!! Really, if anything it's for a little noise and possible to heat up the engine quicker to get that .000001 mpg.
__________________
2014 JKUR, Leather and everything inside, 4 inch OME springs, all Alpine arms, Adams front driveshaft, Falcon 2.1's, Adj track bars front and rear, heavy bumpers and winch, ICON rims and 315-70-17 BFG KO2's, ARB diff covers, ProComp LED's, 2 Bernese Mtn dogs.
Previously 2001 XJ lifted 5, SYE, True-tracks F & R.
CJ7, 304V8, auto, loaded, Detroit rear, and more.
90 Bronco,, 76 Bronco,, 70 Bronco
YnotAJeep is offline   Quote
Old 11-28-2019, 10:32 PM   #15
Supporting Member

5-Year WF Supporting Member
 
TerryC6's Avatar
 
Join Date: Jan 2014
Location: Hesperia, CA
Posts: 7,032
Quote:
Originally Posted by JHD1827 View Post
What is that?

Sent from my SM-G973U using Tapatalk
BLAZE CUT Automatic Fire Suppression System
jadmt and JHD1827 like this.
__________________
Terry

35" Baja MTZ P3's - Level 8 Tracker Pro 5 Wheels - Dynatrac ProGrip Brakes - MetalCloak 2.5" GC Suspension, 6Pak Edition - Griffin Attenuator - Artec Front Axle Armor - Nitro Axle Sleeves - JCR Vanguard Bumpers - Poison Spyder Brawler Rockers & Bombshell Diff Covers - RockHard 4x4 Skid's & Sport Cage - Genesis Dual Battery Kit with G Screen - SPOD - Zeon 10-S - VisionX headlights - Traildash 2 - Morris Mule Trailer
TerryC6 is offline   Quote
Old 12-03-2019, 09:17 PM   #16
Jeeper
 
Join Date: Jan 2015
Location: Far West Texas.
Posts: 118
Flip a coin?

Quote:
Originally Posted by WillB View Post
I take my cover off long enough to detail the engine bay (hand wipe) then put it back on.
SAME HERE. I have the hard rock vented hood, and living in the desert, I cut the vents about 300% larger. When washing the vehicle, the water drops through the vents and on to that cover, then over the engine to the ground. If the cover were not there, I have no clue how long that water might sit in the nooks and crannies of the top end of the motor.

Some say it doesn't do anything. I say it isn't hurting anything either. Your call..... flip a coin?

Mike-5 --El Paso, Texas.
WillB and Leadnut like this.
Mike-5 is offline   Quote
Old 12-03-2019, 11:36 PM   #17
Jeeper
 
YnotAJeep's Avatar
 
Join Date: Nov 2016
Location: La Verne, Calif.
Posts: 3,702
Back in the day,,, when you opened the hood you saw the engine and they looked awesome. But then the 80's and the engines got burred with all kinds of smog crap and they looked well, very bad. You couldn't even see the thing under all the hoses and God knows what. I can't remember who did it first but then they put that plastic cover over everything just to hide the crap, now they all do it. It's cosmetic and for no real reason other than to hide what you really don't want to see.
__________________
2014 JKUR, Leather and everything inside, 4 inch OME springs, all Alpine arms, Adams front driveshaft, Falcon 2.1's, Adj track bars front and rear, heavy bumpers and winch, ICON rims and 315-70-17 BFG KO2's, ARB diff covers, ProComp LED's, 2 Bernese Mtn dogs.
Previously 2001 XJ lifted 5, SYE, True-tracks F & R.
CJ7, 304V8, auto, loaded, Detroit rear, and more.
90 Bronco,, 76 Bronco,, 70 Bronco
YnotAJeep is offline   Quote
Old 12-05-2019, 02:54 PM   #18
Jeeper
 
Join Date: Jul 2013
Location: Hopkinton, MA
Posts: 500
The cover is there for the animal lobby. Mice make nests with the insulation under the cover. How do I know? That smoke coming from my grill at stop lights. Mine's in the attic of my garage now. The mice can make all the nests they want up there without chewing up the wiring while they're at it.
Jack FFR1846 is offline   Quote
Old 12-09-2019, 07:06 AM   #19
Jeeper
 
mcguirev10's Avatar
 
Join Date: Mar 2019
Location: Jax FL
Posts: 563
I test-drove some 3.6L JLs yesterday (not a fan) and I noticed the cover is about 50% smaller. It has a U-shaped cut-out in the front, I guess to make it faster/easier to change the oil. (Not sure if this picture will show up since it's hijacked from another forum.)



My wife's engine cover is hanging on the wall in the garage, right next to the cover from her Solstice GXP that we sold a couple years ago (oops).
__________________
Live-in mechanic for the wife's 2017 2-door sport with the usual bolt-ons, and Xtreme Purple as far as the eye can see...
mcguirev10 is online now   Quote
Old 12-09-2019, 07:11 AM   #20
Moderator

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
Join Date: May 2011
Posts: 7,479
I take my off in the spring, and put it back on in the late fall. Does that matter? To me it does and that's all the matters. LOL I figure the engine will cool a bit faster w/o it in the warmer months, and warm up faster and retain heat a little longer in the colder months.
Old Dogger likes this.
__________________
1988 E-150 4.9L 5 Speed Stick
2008 Jeep Liberty Auto Trans
2016 JK Rubicon Hard Rock Auto Trans

God Bless Our Troops
demarpaint is online now   Quote
Old 12-09-2019, 08:27 AM   #21
Jeeper
 
MRBachand's Avatar
 
Join Date: Apr 2018
Location: MA
Posts: 562
Quote:
Originally Posted by demarpaint View Post
I take my off in the spring, and put it back on in the late fall. Does that matter? To me it does and that's all the matters. LOL I figure the engine will cool a bit faster w/o it in the warmer months, and warm up faster and retain heat a little longer in the colder months.
Same.... I took mine off for the Summer, and left the wife's 16's on... Now her Oil filter housing cracked and maybe its causation/correlation to the cover being on during the summer? lol
Old Dogger likes this.
MRBachand is offline   Quote
Old 12-09-2019, 08:34 AM   #22
Jeeper
 
pkdailey4's Avatar
 
Join Date: Dec 2018
Location: Alameda, California
Posts: 692
I like the cover on, it helps keep things cleanish under the Poison Spider louvered hood.
93YJfan and IndyRubicon17 like this.
__________________
Chrysler POS
pkdailey4 is offline   Quote
Old 12-09-2019, 09:28 AM   #23
Moderator

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
Join Date: May 2011
Posts: 7,479
Quote:
Originally Posted by MRBachand View Post
Same.... I took mine off for the Summer, and left the wife's 16's on... Now her Oil filter housing cracked and maybe its causation/correlation to the cover being on during the summer? lol
Anything is possible, one thing for sure is it does hold heat, a lot of it.
__________________
1988 E-150 4.9L 5 Speed Stick
2008 Jeep Liberty Auto Trans
2016 JK Rubicon Hard Rock Auto Trans

God Bless Our Troops
demarpaint is online now   Quote
Old 12-10-2019, 04:55 AM   #24
Jeeper
 
Lemotan's Avatar
 
Join Date: Mar 2019
Location: California
Posts: 727
I think the main purpose of the cover is to decrease injector/lifters noise , also protecting the hood paint from heat damage, even my black jeep in CA will get only 150f from the sun and can heat up to 230f-240f from the motor.
As for retaining heat i doubt it has any effect at all, it covers the plastic intake that has its own foam pad and imo plays a better role of a "heat detainer".
Throttle body is not coolant heated and the cover keeps it warmer in winter.
mcguirev10 likes this.
Lemotan is offline   Quote
Old 12-10-2019, 12:39 PM   #25
Jeeper
 
mcguirev10's Avatar
 
Join Date: Mar 2019
Location: Jax FL
Posts: 563
Quote:
Originally Posted by Lemotan View Post
I think the main purpose of the cover is to decrease injector/lifters noise , also protecting the hood paint from heat damage, even my black jeep in CA will get only 150f from the sun and can heat up to 230f-240f from the motor.
As for retaining heat i doubt it has any effect at all, it covers the plastic intake that has its own foam pad and imo plays a better role of a "heat detainer".
Throttle body is not coolant heated it probably keeps it warmer in winter.
It definitely masks a ton of noise, my wife's is off simply because I forgot after the last oil change and I freaked out thinking I was the next Pentastar Tick victim, until I remembered the cover is off.

Hadn't considered blocking heat to protect the hood paint, though, that's a good point to think about.

__________________
Live-in mechanic for the wife's 2017 2-door sport with the usual bolt-ons, and Xtreme Purple as far as the eye can see...
mcguirev10 is online now   Quote
Reply

Thread Tools

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






All times are GMT -5. The time now is 09:49 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeepģ, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.