2007 CRD Engine Head Replacement? - 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 > WK Grand Cherokee & XK Commander Forum > 2007 CRD Engine Head Replacement?

New! JK/U skid plate system.1976-1986 Jeep CJ7 with Stationary Vent Windows Weatherstr1976-1986 Jeep CJ7 with Adjustable Vent Windows Weatherstr

Reply
Unread 01-07-2015, 04:43 AM   #1
Tuco
Registered User
2007 WK 
 
Join Date: May 2007
Location: Pacific Northwest
Posts: 545
2007 CRD Engine Head Replacement?

We are in a bad place with our 2007 WK CRD, 75K miles. #5 glow plug has stripped and the threads came out with plug. Too late to determine why this happened, maybe the engine wasn't warm enough. It was the first time plug was removed since factory install. Damage is done, now we need to decide what to do.

There is no MB dealer for about 100 miles. I called the nearest one, they were not familiar with repair needed but might be willing to look into it. We are fortunate to have a good Chrysler/Jeep service dept. in our area but their experience with this engine is somewhat limited. The local mechanic is thinking engine head replacement as they dont feel a helicoil would stand up to the high compression. Id hate to have the helicoil fail when we are 1000 miles from home. We are aware that there is a special tool for doing helicoil, but I would have to purchase tool and am not too keen on having someone do this repair that has not done it before. The dealer mechanic could find a tool for removal, but not for helicoil install part. This repair process seems a bit fuzzy, cant get any definite answers to my questions.

Okay, so there is some good news. We have a relatively complete 3.0 CRD on my engine stand that has about 1000 miles on it. It was hydro-locked with bent and broken piston rod(s) 7.5 years ago and has been in dry storage. Thankfully the insurance company gave us this engine when they paid to replaced it in 2007! The engine is seized but the heads look new.

I can remove the heads on the backup engine and am almost done doing so. Actually, its a pretty fun job with engine on stand in a heated shop. The head(s) will go to a machinist to clean and check. The dealer can replace the head or heads. $1750 in labor for one head and that seems like a good deal to me based on my experience working on engine. I have options:

1. Wait until I find a dealer (Jeep or MB) that can do the head repair and avoid head removal. Might require towing Jeep 100 miles or more or purchasing the tool. Cant find anyone who has done this or knows much about it.

2. Replace one head at dealer (or at home)

3. Replace both heads.

Any thoughts about having one head with 1000 miles and the other head with 75K miles? I feel like its a coin toss, machinist and mechanics so far do not have an opinion. Maybe the engine wont know the difference. We hope to get another 80K out of vehicle (this equates to about 8 more years for a total of 15 years). We tow a trailer.

I might do the repairs myself. I have gone as far as removing turbo and intake manifolds a few years ago when I did the swirl motor replacement. Its just a few steps further to do a head. I dont want to do this as it is a pain to do and might give me a heart attack, but almost motivated by the challenge and dollar savings.

When removing heads on hydrolocked engine I had to make a custom puller to remove the cam chain guide pins (2 on each head pressed in). This puller would not work with engine in vehicle (tool too big). I think I can fabricate one that would work, but not sure about pressing pins back in during head installation (freeze em first?). Where do I get these special tools? Where do I get a complete engine manual? I really dont like working without a manual or withouot Merlintec here.

Anyone find any other forums where I could post my questions? Where did Melintec go!?

Wish us luck!!

__________________
07 WK CRD Limited
Tuco is offline   Reply With Quote Quick reply to this message
Unread 01-07-2015, 07:15 AM   #2
LJS8510
Web Wheeler
 
LJS8510's Avatar
2015 WK 
 
Join Date: Oct 2007
Location: Chicago Il, IL
Posts: 1,375
It sounds like the CRD has been sitting for 7 years might still be there 7 years from now. Might as well put it to good use and exchange the heads.
Otherwise what your plan for that engine?
__________________

WK II Overland, V8, Offroad Group II,- 2008 WK Limited 3.0 CRD, - 2003 WJ Laredo 4.7, - 2001 WJ Laredo 4.0, - 1999 WJ Limited 4.7-
LJS8510 is offline   Reply With Quote Quick reply to this message
Unread 01-07-2015, 08:44 AM   #3
Zlartibartfast
Registered User
2007 WK 
 
Join Date: Aug 2007
Location: Menchaca, Texas
Posts: 564
I'm not experienced with this level of engine repair, but I have been told that a helicoil is not the way to go on a high compression engine. The CRD is definitely high compression.

I agree w/LJS8510 - use this opportunity to replace both heads from your other engine.

lemons to lemonaide....
Zlartibartfast is offline   Reply With Quote Quick reply to this message
Unread 01-07-2015, 08:49 AM   #4
BAH101
Registered User
2008 WK 
 
Join Date: Jan 2009
Location: Thunder Bay, Ontario
Posts: 806
I would change both heads. Your puller would work if you removed your rad. Your going that far into the engine, a rad removal is not much more work. If you can fab up a puller, you can fab up a pressing tool. Try to find some dry ice to cool the part.
You could also, find a diesel specialist. They might be able to fill the glow plug hole with aluminum, then bore it out again and rethread it.
__________________
2008 CRD QDII, OME HD, Pintlers wheels with 265/70/17 Goodyear Silent Armour's, Jeepinbyal UCA's. 4XGuard Front guard, Side Guard, belly guard, Matrix HC. GDE ECO Tune w/ delete.
BAH101 is offline   Reply With Quote Quick reply to this message
Unread 01-07-2015, 10:37 AM   #5
Hendrix9
Registered User
2007 WK 
 
Join Date: Feb 2012
Location: Watertown, Connecticut
Posts: 263
Quote:
Originally Posted by BAH101 View Post
I would change both heads. Your puller would work if you removed your rad. Your going that far into the engine, a rad removal is not much more work. If you can fab up a puller, you can fab up a pressing tool. Try to find some dry ice to cool the part.
You could also, find a diesel specialist. They might be able to fill the glow plug hole with aluminum, then bore it out again and rethread it.
That's what I was thinking. A good welder should be able to build up the material so it could be rethreaded. It's doable, but if he has 2 good heads from the hydrolocked motor I wouldn't bother.
__________________
2007 CRD QDII
4XGuard Matrix, GDE Eco Tune
DPF delete, RC 2.5 lift on 265/70/17s
Hendrix9 is offline   Reply With Quote Quick reply to this message
Unread 01-07-2015, 11:53 PM   #6
ggrassmid
Registered User
 
Join Date: Apr 2014
Location: Grand Rapids, Michigan
Posts: 238
Change both heads from old engine and get them cleaned out good. Use the opportunity to get GDE EcoTune and CB Engineering's EGR delete kit and never worry about a sooty intake again!
__________________
Black 2008 Limited CRD
GDE EcoTune, EHM, 2014 Rubicon take-offs
JF Black WK Club #168
ggrassmid is offline   Reply With Quote Quick reply to this message
Unread 01-08-2015, 07:16 PM   #7
jediknight
Registered User
2008 WK 
 
Join Date: Oct 2011
Location: Montreal, Qc
Posts: 529
Outch !!
Sorry to hear that.
I've seen on youtube a process where they were drilling out the glow plug with a bunch of special tools and compressed air pumped into the chamber through the injector hole.
__________________
2008 WK CRD Blue, QD II, Startech SD6 mod.
jediknight is offline   Reply With Quote Quick reply to this message
Unread 01-08-2015, 07:58 PM   #8
GMaurXJ
Registered User
2008 WK 
 
Join Date: Jan 2013
Location: Brockville, ON
Posts: 6
I think you should really look further into a heli-coil or time-sert instead. This is a quite common repair on the VW / Audi diesels and I think you can probably do it fine here. See link

http://www.myturbodiesel.com/wiki/gl...thread-repair/
GMaurXJ is offline   Reply With Quote Quick reply to this message
Unread 01-08-2015, 10:40 PM   #9
Tuco
Registered User
2007 WK 
 
Join Date: May 2007
Location: Pacific Northwest
Posts: 545
Thanks for all of the replies. Its a difficult decision for me. On the one hand I like the simplicity and efficiency of a heli-coil like shown in that link. There is a video that I saw too. This procedure is not in the "books" at Jeep dealership, but maybe a mercedes dealer service will have the procedure. If the dealer here does the job, I have to buy the tools. I suspect the labor involved would be less, but there is also something appealing about using our 1000 mile old heads, head covers, cams, exhaust manifolds, vacuuum pump, etc. By putting these on the engine maybe we would have more longevity? Or is it better to keep an engine like this intact?

Anyway, I will keep looking into the heli coil solution by calling some service departments out of the area. Im not in a rush.

I appreciate any further suggestions on how to repair a stripped glow plug hole in the CRD head or to use new heads.

Here are some pictures that some might appreciate. I will take more of over head cams when take left side apart.
__________________
07 WK CRD Limited
Tuco is offline   Reply With Quote Quick reply to this message
Unread 01-08-2015, 10:43 PM   #10
Tuco
Registered User
2007 WK 
 
Join Date: May 2007
Location: Pacific Northwest
Posts: 545






__________________
07 WK CRD Limited
Tuco is offline   Reply With Quote Quick reply to this message
Unread 01-09-2015, 11:48 AM   #11
jediknight
Registered User
2008 WK 
 
Join Date: Oct 2011
Location: Montreal, Qc
Posts: 529
Very nice Tuco
I like it !!
__________________
2008 WK CRD Blue, QD II, Startech SD6 mod.
jediknight is offline   Reply With Quote Quick reply to this message
Unread 01-09-2015, 12:44 PM   #12
Zlartibartfast
Registered User
2007 WK 
 
Join Date: Aug 2007
Location: Menchaca, Texas
Posts: 564
My wife calls that "Jeep Porn".

I'm not going to let her see those photos. Your garage is too clean, and she would put me to work.
Zlartibartfast is offline   Reply With Quote Quick reply to this message
Unread 01-09-2015, 02:59 PM   #13
Tuco
Registered User
2007 WK 
 
Join Date: May 2007
Location: Pacific Northwest
Posts: 545
lol

Well I will be posting some serious hard core pics later tonight

I cleaned the shop before starting in fear of harming myself or the engine.

I have an update. I finally spoke with a mechanic who is very familiar with my situation. He is a MB service tech. He said that it is possible to repair with head on engine, but they almost never do. The reason is that the debris from machining is difficult or impossible to get out of cylinder. He also said that the insert may not work if the glow plug hole has been disturbed too much. I dont know what it looks like since the jeep mechanic here actually pulled the plug out.

Anyway, he said that since the head will likely need to be removed I might as well replace it with my fresh one. And since the cost to do both is not much more, might as well do both heads.

At least I know what Im going to do now. The next step is to get the other head off (tricky since the engine is siezed). Have a machinist clean them up and check then have the dealer here replace both heads.

Im tempted to do the job after finally obtaining the CRD manual. However, I think we will let an experienced mechanic with full shop access take care of this one!

More pictures later tonight...let me know if there are specific images you want to see.

PS I love that this engine head is so clean you can see a reflection on the exhaust manifold mounting surface.
__________________
07 WK CRD Limited
Tuco is offline   Reply With Quote Quick reply to this message
Unread 01-09-2015, 05:24 PM   #14
jediknight
Registered User
2008 WK 
 
Join Date: Oct 2011
Location: Montreal, Qc
Posts: 529
haha I'm glad to hear I'm not the only night owl working at night time in its shop... These are the best and more creative moments
__________________
2008 WK CRD Blue, QD II, Startech SD6 mod.
jediknight is offline   Reply With Quote Quick reply to this message
Unread 01-10-2015, 07:15 PM   #15
Tuco
Registered User
2007 WK 
 
Join Date: May 2007
Location: Pacific Northwest
Posts: 545
We got the hydro-locked engine totally stripped down now. Almost everything but the block and one piston rod seemed to survive.

The #6 piston rod was shot about two to three inches thru the block and pierced the counter balance shaft enough to fully seize the engine. Someone must have revved this engine after it hydro locked as it was still running when I shut it off 7 years ago.

Looking for advice on what parts to include from this 1000 miles new engine when building the other 80K mile engine.

So far its the heads, head covers, cams , vacuum pump. Exhaust manifolds. It already has the intake.

Should we use the newer cam chain?
__________________
07 WK CRD Limited
Tuco 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.