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08-03-2016, 05:30 PM
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#1
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Name: Bustedknuckles
Title: Honey Badger
Status: Not Here
Join Date: Jul 2009
Location: Hagerstown, MD
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Posts: 1,778
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6.7 slipped timing?
Anyone ever see slipped timing on a 6.7? Got a truck in the shop now with no compression, it shut off going up a mountain. Rockers are moving and oil and coolant levels are fine and the oil smells fine...
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2004 Lb7: 06 front clip, Idaho-Rob tunes , PPE trans, ML converter, Airdog, ARP head studs, s366.
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08-03-2016, 06:22 PM
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#2
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Name: YoungDiesel27
Title: Never Enough Time
Status: Not Here
Join Date: Jul 2010
Location: West Virginia
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Posts: 825
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No compression on all holes? Did you happen to have the intake off while running compression?
I had one that the throttle valve was stuck closed and wasn't running, after checking compression and not having any on any holes I removed the intake and there it was shut
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EFI Live, HP Tuners, Smarty custom tuning
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08-03-2016, 07:36 PM
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#3
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Name: Bustedknuckles
Title: Honey Badger
Status: Not Here
Join Date: Jul 2009
Location: Hagerstown, MD
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Posts: 1,778
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It spins like a car with a broken timing belt. Ill have to check that!
Sent from my SM-G930P using Tapatalk
__________________
2004 Lb7: 06 front clip, Idaho-Rob tunes , PPE trans, ML converter, Airdog, ARP head studs, s366.
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08-03-2016, 09:54 PM
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#4
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Name: LAmiller
Title: THE KT-BOUNDARY
Status: Not Here
Join Date: Aug 2006
Location: Plain City, OH
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Posts: 3,603
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no rail pressure will spin over easy also, does rail pressure come up to 4500psi while cranking?
Lavon
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2016 QDLB 4x4, Firepunk EZLynk.
http://www.shop.firepunk.com
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08-03-2016, 10:59 PM
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#5
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Name: Bustedknuckles
Title: Honey Badger
Status: Not Here
Join Date: Jul 2009
Location: Hagerstown, MD
Member`s Gallery
Posts: 1,778
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Quote:
Originally Posted by LAmiller
no rail pressure will spin over easy also, does rail pressure come up to 4500psi while cranking?
Lavon
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Not sure, i just took a real quick look at it when it got dropped off as it was the end of the day. I'm going to put a scanner on it tomorrow morning.
Sent from my SM-G930P using Tapatalk
__________________
2004 Lb7: 06 front clip, Idaho-Rob tunes , PPE trans, ML converter, Airdog, ARP head studs, s366.
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08-03-2016, 11:30 PM
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#6
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Name: YoungDiesel27
Title: Never Enough Time
Status: Not Here
Join Date: Jul 2010
Location: West Virginia
Member`s Gallery
Posts: 825
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Quote:
Originally Posted by Bustedknuckles
Not sure, i just took a real quick look at it when it got dropped off as it was the end of the day. I'm going to put a scanner on it tomorrow morning.
Sent from my SM-G930P using Tapatalk
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Oh, I was assuming you had checked that stuff and ran a compression test on it. Yea make for sure its building rail pressure before doing anything else.
__________________
EFI Live, HP Tuners, Smarty custom tuning
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08-04-2016, 06:51 AM
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#7
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Name: Bustedknuckles
Title: Honey Badger
Status: Not Here
Join Date: Jul 2009
Location: Hagerstown, MD
Member`s Gallery
Posts: 1,778
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5600 psi rail, 160 rpm cranking speed, air intake and intake manifold disconnected, already deleted so it cant be plugged exhaust. No clue what happened but it definitely lost compression!
Sent from my SM-G930P using Tapatalk
__________________
2004 Lb7: 06 front clip, Idaho-Rob tunes , PPE trans, ML converter, Airdog, ARP head studs, s366.
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08-04-2016, 07:46 AM
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#8
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Name: RDPsmoker
Title: OUT TO LUNCH..
Status: Not Here
Join Date: Nov 2010
Location: Casper or Laramie WY
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Posts: 1,815
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I'd pull the front cover off and see if anything looks out of place.
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08-04-2016, 08:24 AM
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#9
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Name: Mark Nixon
Title: No Savior among the flesh
Status: Not Here
Join Date: Feb 2009
Location: Brownville, Nebraska
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Posts: 8,676
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Don't rule out a slipped cam or crank gear.
Or even a lifted head gasket.
I also wouldn't rule out overheating and cooked rings, regardless what the customer may say.
They don't just lose compression out of nowhere, pulling a grade, something let go.
Mark.
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Anarchy: The state of existence where there are no masters & no slaves. Therefore, Anarchy means the ABSENCE OF SLAVERY, or, in other words, FREEDOM.
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08-04-2016, 05:07 PM
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#10
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Name: Bustedknuckles
Title: Honey Badger
Status: Not Here
Join Date: Jul 2009
Location: Hagerstown, MD
Member`s Gallery
Posts: 1,778
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Quote:
Originally Posted by Mark Nixon
Don't rule out a slipped cam or crank gear.
Or even a lifted head gasket.
I also wouldn't rule out overheating and cooked rings, regardless what the customer may say.
They don't just lose compression out of nowhere, pulling a grade, something let go.
Mark.
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A head gasket makes the most sense but is it even possible to blow one that badly? Sadly he is from out of state and is probably getting the truck as is and taking it home
__________________
2004 Lb7: 06 front clip, Idaho-Rob tunes , PPE trans, ML converter, Airdog, ARP head studs, s366.
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