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Have you had a valve failure? Please fill out the form below (hit quote on post 2) if you have!
Yes 12%  12%  [ 6 ]
No 35%  35%  [ 17 ]
Not Yet (But I'm worried) 37%  37%  [ 18 ]
Not Yet (Not worried) 16%  16%  [ 8 ]
Total votes : 49
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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Thu Aug 10, 2017 11:44 pm 
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Joined: Fri May 20, 2011 8:57 pm
Posts: 97
Location: New Orleans, Louisiana
i have the old valves but he cleaned them up. He said he didn't see anything obvious wrong with them. I'll see if there's anything about them that could be of interest. i'll post some pics

Congrats to the members who started these threads about valves and bolts. it really convinced me to go beyond the collapsed rockers and pull the head. glad i did since there probably already was a coolant leak, and it was likely on its way to further warping and valve trouble. it's a little early to celebrate... i still have to get it back together and get 100,000 miles out of it.

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2005 Jeep Liberty CRD 110k miles - working on tb, rockers, arp, camshafts
1985 Mitsubishi Mighty Max 2.0 liter
1989 Vanagon GL


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Tue Dec 05, 2017 9:33 pm 
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Joined: Fri Jun 22, 2007 11:43 am
Posts: 3919
Location: Green Cove Springs FL
Another dropped valve.
Captain Dean posted his with pictures over in the 4x4 section.

And another cracked head.
MicroBruin posted about his today too.

If you’ve made it over 200k miles without a broken valve/head you are doing something right.
Whatever that may be.

_________________
Bought my '05 CRD on June 2nd '07, used with 29,000 miles.
intake elbow and EGR delete. 7 volt Etecno glow plugs
Yeti stage 2 ECU tune. Straight pipe exhaust. DIY intercooler hoses
Provent and modified factory 180F thermostat
Replaced cylinder head (cracked) at 160,000 miles + ARP studs
Cheap 1 inch lift, 245-75R-16 tires.
Still love it.


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Tue Dec 05, 2017 9:55 pm 
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Joined: Sat Nov 23, 2013 8:57 pm
Posts: 1912
Location: Garden Valley, Idaho
WWDiesel wrote:
minnisp wrote:
anyone can google "valve failure", but this one isn't infested with pop-ups and advertising (and it's free)
https://www.rroij.com/open-access/failu ... ?aid=44965

Thank you very much for the link! A very good read that reinforces what some on LOST have been saying all along.
It is a shame the picture links on the Web page do not work (404) :(
I figured out if you click on "View PDF", you can see the pictures in the article and save the article for future reference if you so desire... :wink:

The main takeaway in the article: Fatigue failure is the main cause of valve failure. The fatigue strength is significantly decreased with increase of temperature.
The article does a good job of explaining how high temperatures over time can cause fatigue, stress cracking, and eventual failure!
I am of the opinion that temperature plays a huge roll in the valve failures and / or head cracking that some have unfortunately had happened to them... :roll:


I think the egr soot that collects around the valves makes them hotter (dissipate less heat) and/or causing them to stick, and that this is why egr infested Jeeps drop valves. Although at least half of the ones I get in to have dropped a valve because the rocker collapsed, then came apart, and managed to bind the spring into letting the keepers free. My machinist said the VW's are hard on the guides, I'll have to ask him if he's referring to egr soot laden ones

_________________
05 CRD: H.D.S2 stat,OME lift,GDE engine&trans tune,Truetrac front dif,FFD fan,ARP's, new head,rockers, cams, lift pump,Sasquatch grid heater, trans pump, turbo, Hemi TC,fuel head,welded EGR port, Samcos, muffler delete, RL cargo shelf, steel roof rails
Mech fan, VH & AC delete (4 pulleys removed), tensioner relocated
-CRD's being restored


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Wed Dec 06, 2017 12:13 pm 
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Joined: Tue Dec 26, 2006 10:05 am
Posts: 58
Location: Sarasota
CRD Year:2006
[/color]Mileage at failure:80,000
Mileage with functional EGR:80,000
Method of EGR delete (elbow, GDE, SEGR, died and you didn't fix):
Most common driving (city/highway/mountains/etc):80/20 city/hw
Do you have an Exhaust Temp gauge:no
Pre or post turbo: ?
If so, most recent average running temp you remember:
Any issues with overheating in the recent history before your failure?:none
ARP studs?no
Replacement rockers?no
Time / mileage between engine work and valve failure? opening motor today
Which cylinder failed? will see
How many valves, and which ones broke? will see
Did the stem break, and was it where the chrome met the black, in the middle of the black, or at the valve "coin" itself? ?
Do you have any pictures, and can you link / post them here please? ?
Can you also post a picture / report what the cylinder head stamping was? ?

So ever since my last oil change I have had increased smoke and then TIC TIC TIC. I shut it down and got AAA'ed back to the house. My Mechanic brother and law and I are opening her up to see what it looks like. This the first major repair for my CRD other than the fuel head heater, surp belt and lift pump ing-tank. Any and all input is greatly welcomed. We are in uncharted waters. I am willing to take phone calls even. e-mail me at fishinfruition@yahoo.com will talk and take advise we know we need it.

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06 crd sport 60000


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Wed Dec 06, 2017 3:08 pm 
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Joined: Sat Nov 23, 2013 8:57 pm
Posts: 1912
Location: Garden Valley, Idaho
JeepCRD4Me wrote:
CRD Year:2006
[/color]Mileage at failure:80,000
Mileage with functional EGR:80,000
Method of EGR delete (elbow, GDE, SEGR, died and you didn't fix):
Most common driving (city/highway/mountains/etc):80/20 city/hw
Do you have an Exhaust Temp gauge:no
Pre or post turbo: ?
If so, most recent average running temp you remember:
Any issues with overheating in the recent history before your failure?:none
ARP studs?no
Replacement rockers?no
Time / mileage between engine work and valve failure? opening motor today
Which cylinder failed? will see
How many valves, and which ones broke? will see
Did the stem break, and was it where the chrome met the black, in the middle of the black, or at the valve "coin" itself? ?
Do you have any pictures, and can you link / post them here please? ?
Can you also post a picture / report what the cylinder head stamping was? ?

So ever since my last oil change I have had increased smoke and then TIC TIC TIC. I shut it down and got AAA'ed back to the house. My Mechanic brother and law and I are opening her up to see what it looks like. This the first major repair for my CRD other than the fuel head heater, surp belt and lift pump ing-tank. Any and all input is greatly welcomed. We are in uncharted waters. I am willing to take phone calls even. e-mail me at fishinfruition@yahoo.com will talk and take advise we know we need it.


So it still runs? Don't start it, but if so, a light tic is probably not a dropped valve. Probably collapsed rocker, likely need a cam. Maybe a rod bearing if it's more of a light knock. Main bearing sounds like smacking a big hammer on the side of the block down low...

_________________
05 CRD: H.D.S2 stat,OME lift,GDE engine&trans tune,Truetrac front dif,FFD fan,ARP's, new head,rockers, cams, lift pump,Sasquatch grid heater, trans pump, turbo, Hemi TC,fuel head,welded EGR port, Samcos, muffler delete, RL cargo shelf, steel roof rails
Mech fan, VH & AC delete (4 pulleys removed), tensioner relocated
-CRD's being restored


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Wed Dec 06, 2017 7:21 pm 
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Joined: Tue Dec 26, 2006 10:05 am
Posts: 58
Location: Sarasota
So it still runs? Don't start it, but if so, a light tic is probably not a dropped valve. Probably collapsed rocker, likely need a cam. Maybe a rod bearing if it's more of a light knock. Main bearing sounds like smacking a big hammer on the side of the block down low...[/quote]

Mountainman
That's kind of encouraging. It did run even after the tow. It sounded like one nut in a tin coffee can. What is with the timing cover holding down the top of engine cover? Do we need to pull the fan clutch and timing cover to get at fasteners in that area?

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06 crd sport 60000


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Wed Dec 06, 2017 8:46 pm 
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Joined: Fri Jun 22, 2007 11:43 am
Posts: 3919
Location: Green Cove Springs FL
Removing the valve cover requires all the same procedures for replacing the timing belt and water pump.
After that you remove the fuel rail and injectors to unbolt and remove the valve cover.
It also help to disconnect the wiring harness connections on the passenger side so you can move the harness out of the way.

If you haven’t yet replaced your timing belt and water pump, now would be a good time.
It would also be a good time to delete your EGR valve.

_________________
Bought my '05 CRD on June 2nd '07, used with 29,000 miles.
intake elbow and EGR delete. 7 volt Etecno glow plugs
Yeti stage 2 ECU tune. Straight pipe exhaust. DIY intercooler hoses
Provent and modified factory 180F thermostat
Replaced cylinder head (cracked) at 160,000 miles + ARP studs
Cheap 1 inch lift, 245-75R-16 tires.
Still love it.


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Wed Dec 06, 2017 9:20 pm 
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User avatar

Joined: Sat Nov 23, 2013 8:57 pm
Posts: 1912
Location: Garden Valley, Idaho
JeepCRD4Me wrote:
So it still runs? Don't start it, but if so, a light tic is probably not a dropped valve. Probably collapsed rocker, likely need a cam. Maybe a rod bearing if it's more of a light knock. Main bearing sounds like smacking a big hammer on the side of the block down low...


Mountainman
That's kind of encouraging. It did run even after the tow. It sounded like one nut in a tin coffee can. What is with the timing cover holding down the top of engine cover? Do we need to pull the fan clutch and timing cover to get at fasteners in that area?[/quote]

How long did it run for with that sound, and was it a fairly consistent sound? Rod bearing sucks because you still have to pull the engine, but that would give a consistent knock, like clock work idle

_________________
05 CRD: H.D.S2 stat,OME lift,GDE engine&trans tune,Truetrac front dif,FFD fan,ARP's, new head,rockers, cams, lift pump,Sasquatch grid heater, trans pump, turbo, Hemi TC,fuel head,welded EGR port, Samcos, muffler delete, RL cargo shelf, steel roof rails
Mech fan, VH & AC delete (4 pulleys removed), tensioner relocated
-CRD's being restored


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 Post subject: Re: Valve failure research thread - We need your data!
PostPosted: Sat Dec 09, 2017 2:50 pm 
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Joined: Tue Dec 26, 2006 10:05 am
Posts: 58
Location: Sarasota
So after the big nut in a coffee can sounds came the run time was maybe 15 second. Also is that fan clutch nut a left or right to remove. Its is giving us fits. I am going to move this to a new thread.

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06 crd sport 60000


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