Intake Valve or?
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Senior User
Joined: Aug 2010
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From: Agawam MA
Yes sir, not a lot, but it definitely moved the piston down, maybe a quarter of a turn? And it had all the other Glow plugs in it when I did that, so it was fighting compression 
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Senior User
Joined: Aug 2010
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From: Agawam MA
Update:
Well, my compression tester took a crap after testing one cylinder, #2 registered 100#...
So I took the opportunity to pressurize #2 with all the glow plugs out...
Air came rushing out of #4 Glow Plug hole...
SO if I am thinking clearly, the only answer is a blown head gasket between #2 & #4 correct?
I think 87crewdually is our winner!!!
Well, my compression tester took a crap after testing one cylinder, #2 registered 100#...
So I took the opportunity to pressurize #2 with all the glow plugs out...
Air came rushing out of #4 Glow Plug hole...
SO if I am thinking clearly, the only answer is a blown head gasket between #2 & #4 correct?
I think 87crewdually is our winner!!!
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
That would be a good assumption!
Regardless of the confusing information ...
With a head gasket blown between 2&4 ... Cracking #4 would have made changes as well!
Anytime you have two cylinders side by side with issues, head gasket is a good assumption ...
-Enjoy
fh : )_~
Regardless of the confusing information ...
Anytime you have two cylinders side by side with issues, head gasket is a good assumption ...
-Enjoy
fh : )_~
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Senior User
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From: Agawam MA
Sorry about the confusing info, I can only report what I observed hahhah...
Cracking any injector made the motor run rougher, cracking #2 made it rougher but the loud intake knock went away...
Theory...
#2 fires, blows combustion into #4 which has the intake valve open at that moment... when #2 is disabled, no combustion so much quieter knock?
Cracking any injector made the motor run rougher, cracking #2 made it rougher but the loud intake knock went away...
Theory...
#2 fires, blows combustion into #4 which has the intake valve open at that moment... when #2 is disabled, no combustion so much quieter knock?
Thread Starter
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Senior User
Joined: Aug 2010
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From: Agawam MA
update
Well, the verdict is in...
Blown fire rings on head gasket between Cylinders #2 and #4.
Next item for debate...
When I pulled the injectors, these 2 cylinders injectors were very wet...
SO, did the weeping injectors cause the head gasket failure or did the failure make the injectors weep?
Have all new injectors to install from Pensicola Diesel, just in case
Blown fire rings on head gasket between Cylinders #2 and #4.
Next item for debate...
When I pulled the injectors, these 2 cylinders injectors were very wet...
SO, did the weeping injectors cause the head gasket failure or did the failure make the injectors weep?
Have all new injectors to install from Pensicola Diesel, just in case
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
Well, the verdict is in...
Blown fire rings on head gasket between Cylinders #2 and #4.
Next item for debate...
When I pulled the injectors, these 2 cylinders injectors were very wet...
SO, did the weeping injectors cause the head gasket failure or did the failure make the injectors weep?
Have all new injectors to install from Pensicola Diesel, just in case
Blown fire rings on head gasket between Cylinders #2 and #4.
Next item for debate...
When I pulled the injectors, these 2 cylinders injectors were very wet...
SO, did the weeping injectors cause the head gasket failure or did the failure make the injectors weep?
Have all new injectors to install from Pensicola Diesel, just in case
Gee really.
The reason for the injectors being wet is because there wasn't enough atomization to burn the fuel so the injectors were just squirting fuel, swirling it around and then the unburnt fuel was going elsewhere like out the exhaust port and to the neighboring cylinder.
Glad you got it figured, just take your time on reassembly. Clean is everything when putting the heads back on.
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Post Fiend
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From: Faibanks Ak.
I finished the day once with a head gasket blown between 2 cyl and then drove it about 70 miles home. This was on a 427 gas rig and I thought I probably had a couple bad plugs or wires. When I pulled the head the air pressure had cut the head and the block enough that niether was usable.
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Senior User
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From: Agawam MA
Gee really.
The reason for the injectors being wet is because there wasn't enough atomization to burn the fuel so the injectors were just squirting fuel, swirling it around and then the unburnt fuel was going elsewhere like out the exhaust port and to the neighboring cylinder.
Glad you got it figured, just take your time on reassembly. Clean is everything when putting the heads back on.
The reason for the injectors being wet is because there wasn't enough atomization to burn the fuel so the injectors were just squirting fuel, swirling it around and then the unburnt fuel was going elsewhere like out the exhaust port and to the neighboring cylinder.
Glad you got it figured, just take your time on reassembly. Clean is everything when putting the heads back on.
Yah, I know about the who cleanliness thing, it's tough to be perfect doing the job in-truck, but I did the other side already, so I have a bit of experience...
Thanks all for the input, I will let y'all know how she turns out
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