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#180666 - 01/01/09 03:03 PM 2006 5.7 hemi problem
TrueTripleX Offline
super stock

Registered: 10/12/04
Posts: 1010
Loc: Ball Ground GA
Motor is out of a 300M and I believe is the 4-8 motor where the cylinders shut down if not needed.
When I turn the motor over with the coil unplugged, I carry 200# compression on all 8 cylinders. But when I RUN the motor at an idle, on number 4 cylinder, none of the rockers are moving. But they do moving when hand cranking motor. Pulled head and #4 cylinder is oil soaked. It appears there are solenoids that control oil flow to every other cylinders and this cylinder has a solenoid for it. WHAT IS WRONG AND what should I do. Give me the old iron. That I understand.

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#180667 - 01/01/09 06:27 PM Re: 2006 5.7 hemi problem [Re: TrueTripleX]
earlybee Offline
master

Registered: 01/19/03
Posts: 8064
Loc: Arlington, Texas
There are 8 coils. Check for the right oil viscosity/weight. http://www.allpar.com/mopar/new-mopar-hemi.html

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#180668 - 01/02/09 10:29 AM Re: 2006 5.7 hemi problem [Re: earlybee]
TrueTripleX Offline
super stock

Registered: 10/12/04
Posts: 1010
Loc: Ball Ground GA
Quote:

There are 8 coils. Check for the right oil viscosity/weight. http://www.allpar.com/mopar/new-mopar-hemi.html



I am aware of the 8 coils, I am talking about what appears to be 4 solenoids in what us oldtimers would call the valley pan area. And the oil issue does not explain why ALL the rockers work at hand crank, but when running, number 4 rockers are NOT working

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#180669 - 01/02/09 10:39 AM Re: 2006 5.7 hemi problem [Re: TrueTripleX]
MattW Offline
top fuel

Registered: 06/02/05
Posts: 2062
Loc: Ontario Canada
I believe the when you turn it over by hand the rockers work because you do not have enough oil pressure to activate the solenoids. You have enough when you crank by starter. I don't think it should work at idle. Like it was stated before you need the proper oil. If it is too thick it will activate the deactivation solenoids to soon Matt

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#180670 - 01/02/09 11:30 AM Re: 2006 5.7 hemi problem [Re: MattW]
TrueTripleX Offline
super stock

Registered: 10/12/04
Posts: 1010
Loc: Ball Ground GA
Quote:

I believe the when you turn it over by hand the rockers work because you do not have enough oil pressure to activate the solenoids. You have enough when you crank by starter. I don't think it should work at idle. Like it was stated before you need the proper oil. If it is too thick it will activate the deactivation solenoids to soon Matt



But why does this only affect ONE of the solenoids and not the other 3? As I mentioned it is only on the number 4 cylinder. Could that solenoid be bad and is there a way to test it? And final question, if it is the oil and assuming the solenoid is good, do I need to change the lifters on number 4 (I forgot to mention that I bent push rods on that cylinder) along with the push rods only? FYI these lifters are $200 EACH.


Edited by TrueTripleX (01/02/09 11:45 AM)

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#180671 - 01/02/09 12:38 PM Re: 2006 5.7 hemi problem [Re: TrueTripleX]
gremlinsteve Offline
top fuel

Registered: 09/01/04
Posts: 1660
Loc: houston texas
the solenoids work the oil flow to the lifter. those 4 cycl have lifters that are differant than the none mds cycl.

the lifter has a bleed hole in it. basicly it dropp pressure. craks the exhaust valve open and will not open the intake valve.

i suggest replacing the lifters to that cycl. also replace the solenoid to the cyl.

check that the motor is running the 0-20 oil also. anything greater in viscosity and the mds solenoid will not work right. but that does not explain why the others are not acting up.

is it setting codes? p0300? p0304?

steve
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#180672 - 01/02/09 12:39 PM Re: 2006 5.7 hemi problem [Re: TrueTripleX]
gremlinsteve Offline
top fuel

Registered: 09/01/04
Posts: 1660
Loc: houston texas
send me your contact info also...i think i have some of those lifters laying around. i have at least one solenoid also..


steve
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