UGH.. 4.7 HO is TOAST - Page 2 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > UGH.. 4.7 HO is TOAST

Year End Clearance Sale! Save 20%Santa Kolak Announces: Kolak Exhaust 20% Off Sale!ROCK BOTTOM prices on LIFT KITS at Rockridge4wd!! WANT TO

Reply
Unread 11-09-2013, 06:12 PM   #16
champ926
Senior Member
1999 WJ 
 
Join Date: Dec 2010
Location: Mount Pocono, Pennsylvania
Posts: 660
Quote:
Originally Posted by gschris
So apparently my engine is pretty much toast.. I spun two rod bearings, which scored the crank up pretty good.. and broke a rod cap...looking at all my options.. I own a small salvage yard, and have the parts to put a 4.8LS engine in there.. has anyone else done this? Or, where can I get aftermarket rods and a crank kit for the HO? nobody seems to have these parts available..
Airram.com has after market scat rods and ross pistons. And everything else to rebuild the motor

champ926 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 06:18 PM   #17
Trav1s
Registered User
2004 WJ 
 
Join Date: May 2012
Location: Cedar Rapids, IA
Posts: 271
If you are thinking swap why not go with a Supercharged 3800 like in the GTP and Regal GS?

As for sludge... it is not unique to the 4.7. Got tons of stories from my old man's service station related to sludge...
__________________
04 Columbia Ed 4.7 HO/QTII/SSD107/UC/Bilstein 4600/RB4/Moabs/Cooper Discoverer AT3's/PML trans pan
Trav1s is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 06:34 PM   #18
Highschool_WJ
Registered User
1999 WJ 
 
Join Date: Jan 2013
Location: Minot, ND
Posts: 346
Quote:
Originally Posted by Jeeples View Post

What fantasy land do you live in that will allow for a 15+ year old motor to be installed into a late model vehicle and still pass emissions?
I live in the magical land of North Dakota where we have no such things as emmison tests that doth need be passed! Im sorry but I had to say it
Highschool_WJ is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 07:47 PM   #19
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by Jeeples
So sludge issues to you means the crud that builds up on the filler cap? Yeah, ok, you're right that totally means engine failure If you wanna talk about a Chrysler motor with legitimate sludge issues, go do a little reading about the 2.7 V-6. As for your comment about the map system, what exactly are you referring to? Which produced a mighty 215 HP in 2001. Yeah, but past 2001 they were no longer part of any regular production vehicle.
What do you mean what am I referring towith map system failures? Dont you know what that is? The manifold absolute pressure sensor is one of the sensors used in an internal combustion engine's electronic control system. Engines that use a MAP sensor are typically fuel injected. Thats why I said ouch. 4.7 are prone to map sensor failures. That failing is bad. And also what do you mean the 302 is not in any more production vehicles. Ever hear of the Ford Mustang 302 Boss?
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 07:51 PM   #20
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by Highschool_WJ
I live in the magical land of North Dakota where we have no such things as emmison tests that doth need be passed! Im sorry but I had to say it
Thank you man. Some people just apply things to where they live. Im in Pennsylvania and there are people putting 1970s Chevy 350s and Ford 351 small blocks in theres.
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 07:58 PM   #21
Jaspah
Registered User
2002 WJ 
 
Join Date: Oct 2012
Location: Hamilton, NY
Posts: 249
Quote:
Originally Posted by wjjeep19 View Post
Thank you man. Some people just apply things to where they live. Im in Pennsylvania and there are people putting 1970s Chevy 350s and Ford 351 small blocks in theres.
Pennsylvania leaves emissions tests at the discretion of the county, no?
Jaspah is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 08:01 PM   #22
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by Jaspah
Pennsylvania leaves emissions tests at the discretion of the county, no?
As far as I know we go in regions not countys
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 08:08 PM   #23
Jeeples
Web Wheeler
 
Jeeples's Avatar
2000 WJ 
 
Join Date: Jul 2006
Location: forum/f310/, UT
Posts: 4,860
Quote:
Originally Posted by wjjeep19 View Post
And also what do you mean the 302 is not in any more production vehicles. Ever hear of the Ford Mustang 302 Boss?
Wait....you think the new Coyote 5.0 is in any way related to the old 302?

Yeah you got some learning to do son.
__________________
His: '00 WJ 4.7 Limited- stock

Hers: '03 WJ 4.7 V8- IRO 3", 245/75/16 Duratracs
Jeeples is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 08:16 PM   #24
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by Jeeples
Wait....you think the new Coyote 5.0 is in any way related to the old 302? Yeah you got some learning to do son.
I said put a 302 in it. I did not say the old or new. And unless im incorrect, I am pretty sure they are still 302 Cubic Inches. Aren't they?
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 08:22 PM   #25
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by Jeeples
Wait....you think the new Coyote 5.0 is in any way related to the old 302? Yeah you got some learning to do son.
Also the reason why I said to put the 302 in it because it, in my opinion, is one of the most reliable v8s. You still get the power and it will fit in the WJ. Where the 5.7 Hemi, 350, 351 (which those three are pretty common for engine swaps) will not fit in the WJ.
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 08:36 PM   #26
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
If I could reverse time I would. I would reverse to the days where you had room to work under the hood and fit bigger engines. I wish I could take it back to the AMC days with the Grand Wagoneer 6.6l 401 big block. Or the CJ7 Renegade. But unfortunately time travel is only a theory with the possibilities of wormholes that are the size of centimeters and are in space for mere seconds.
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-09-2013, 08:52 PM   #27
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by Jeeples
Wait....you think the new Coyote 5.0 is in any way related to the old 302? Yeah you got some learning to do son.
Let me also clear things up. Im not trying to sound like a prick. I think the 4.7 would be great, if it wasn't for the lack of engineering in it. Looking at the schematics of the engine, it isn't that impressive and is why it probably has sludge issues. Also with the map system, thats poor software engineering with the sensors. Idk what those Jeep engineers were doing, not saying that I'd do a better job, because im still in college majoring in Computer Engineering and minoring in Electrical Engineering. I think you've provided valid points, which I can't particularly say of some of the others.
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-10-2013, 01:56 PM   #28
gold01wj
Registered User
2000 WJ 
 
Join Date: Mar 2013
Location: Toadlena,, Northwest New Mexico
Posts: 314
Quote:
Originally Posted by wjjeep19 View Post
Also the reason why I said to put the 302 in it because it, in my opinion, is one of the most reliable v8s. You still get the power and it will fit in the WJ. Where the 5.7 Hemi, 350, 351 (which those three are pretty common for engine swaps) will not fit in the WJ.
The new 302s haven't been out hardly long enough to prove longevity and reliability... According to you at most only 6-7 years but in reality on 2-3 years in the new mustangs. These 4.7s we deal with have in most cases 10 to almost 15 years on them, and if taken care of over 200000 miles. In my opinion a 302 out of a new mustang doesn't seem like a cost effective swap vs. the millions of Ls motors and 4.7s out there. I personally am a chevy guy, but would just leave a 4.7 in the op's jeep. I'd think you'd spend more money and time trying to make the Ls work (or 302) than a decent salvage 4.7 motor would set you back.
__________________
2000 wj limited quadradrive 4.7 family vehicle-was stock, then lifted 4",now stock again
gold01wj is offline   Reply With Quote Quick reply to this message
Unread 11-10-2013, 02:47 PM   #29
wjjeep19
Registered User
2002 WJ 
 
Join Date: Aug 2012
Location: Chambersburg, Pennsylvania
Posts: 258
Quote:
Originally Posted by gold01wj
The new 302s haven't been out hardly long enough to prove longevity and reliability... According to you at most only 6-7 years but in reality on 2-3 years in the new mustangs. These 4.7s we deal with have in most cases 10 to almost 15 years on them, and if taken care of over 200000 miles. In my opinion a 302 out of a new mustang doesn't seem like a cost effective swap vs. the millions of Ls motors and 4.7s out there. I personally am a chevy guy, but would just leave a 4.7 in the op's jeep. I'd think you'd spend more money and time trying to make the Ls work (or 302) than a decent salvage 4.7 motor would set you back.
The 302 still generally has the same design. Not part to part but its generally the same. And if its such a hassle then I would put the 5.3. Really, i would put anything in it (basically) before I put a 4.7. I personally like Ford Motors or AMC Engines but will not rule out the prestigious 350. But in this case even a 5.7 hemi wont fit, let alone a 350.
wjjeep19 is offline   Reply With Quote Quick reply to this message
Unread 11-10-2013, 02:54 PM   #30
Darnice
Registered User
2004 WJ 
 
Join Date: Nov 2012
Location: Windsor, Ontario
Posts: 510
Quote:
Originally Posted by wjjeep19 View Post
What do you mean what am I referring towith map system failures? Dont you know what that is? The manifold absolute pressure sensor is one of the sensors used in an internal combustion engine's electronic control system. Engines that use a MAP sensor are typically fuel injected. Thats why I said ouch. 4.7 are prone to map sensor failures. That failing is bad. And also what do you mean the 302 is not in any more production vehicles. Ever hear of the Ford Mustang 302 Boss?
Huh? to be honest, I have never hear of a 4.7 having a map sensor failure, ever.
Now TPS, yes, they wear out, but it does not blow up motors, just replace and good as new.
I have 200,000 miles on my 4.7, no map failure no sludge build up, nothing you keep going on about.
Darnice is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.