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Debugging slightly low boost

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Old Sep 20, 2015 | 08:50 AM
  #271  
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I spun the GP adapter all the way into the head, then without the VC gasket in my way, I approached the GP adapter from the valley side, just over the VC bolt hole. Your picture shows a VC bolt where mine would be removed... what gives?

Also... maybe my GP adapter is different (your kit is certainly different than mine), but yours is way the hell up high in the head. Mine spun down until the hex part was flush with the face of the head.





 
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Old Sep 20, 2015 | 08:59 AM
  #272  
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Oh crap... I had to stare at it for a while. You have studs, where I have bolts. All is not lost... get the GP adapter down and the VC gasket out of there - it may still fit.
 
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Old Sep 20, 2015 | 09:25 AM
  #273  
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One more thought after reviewing everything - a socket won't spin the adapter in there, it won't fit. I used tubing that I modified (you can see the picture above). If you take your GP adapter down to the hardware store, you might find some tubing that fits snugly without adapting. This is the concept that led me to use tubing to spin the adapter in/out:


 
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Old Sep 20, 2015 | 11:39 AM
  #274  
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5/16 fuel line works to spin the adapter in. A foot of it is plenty. You can get a 1/4 drive 7/16 socket with a 1/4" extension on the adapter. I tape the socket to the extension and block the holes for the push rods when messing with the sockets....

My studs come out, so I was able to test without them. I suspect you could work around the studs.


You do need to put it to the side of the rocker and the clip it in. And you need a 90 degree pick to get it off.

 
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Old Sep 20, 2015 | 11:56 AM
  #275  
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5/16"? That's the black fuel line I have for the GPs. Either I have a different fitting, or it never occurred to me to put the tubing in the inside diameter of the adapter.
 
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Old Sep 20, 2015 | 12:08 PM
  #276  
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Hmm, do you manage to get the 5/16 over the nut (I couldn't).


Here an adapter (not the 7.3 one) and a gp.

3/16 on the gp

5/16 on the adapter

 
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Old Sep 20, 2015 | 12:26 PM
  #277  
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OK... I cleared the air from my brain fart. My tubing is semi-rigid. That means the dimensions I work with are Outer Diameter, where your hoses are measured in Inner Diameter. 5/16" OD semi-rigid fuel tubing nails the glow plug handily. The GP adapter? I dunno, I made do with what was hangin' around my shop. 3/8" OD? 7/16" OD?
 
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Old Sep 20, 2015 | 05:18 PM
  #278  
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This may end up being the slowest compression test / o-ring replacement job ever :-). I'm going slow, but moving forward.


Cyll2:

Cyll4:

Cyll6:

Cyll8:
 
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Old Sep 20, 2015 | 08:27 PM
  #279  
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I would call those:


Cyll2: 450
Cyll4: 450
Cyll6: 425
Cyll8: 425

Do the experts here agree?
 
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Old Sep 20, 2015 | 08:56 PM
  #280  
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This expert would say you have a nice freaking starter. Jeez. I thought I was all that with how fast Stinky cranks... until I saw that.

Yeah - you have good numbers. This is all assuming the lines didn't ooze some compression out a loose fitting. Either way, you look real good.
 
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Old Sep 20, 2015 | 09:04 PM
  #281  
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Originally Posted by Tugly
This expert would say you have a nice freaking starter. Jeez. I thought I was all that with how fast Stinky cranks... until I saw that.

I suspect the 40 amp charger I had hooked up for the whole test had something to do with that as well.
 
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Old Sep 23, 2015 | 11:14 AM
  #282  
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Those are great numbers. I saw between 350 and 380 on mine.

Sorry I wasn't on to help, I'm trying to put my motor back in and is fighting me bad.
 
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Old Sep 23, 2015 | 06:09 PM
  #283  
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Originally Posted by scotttahoe
Those are great numbers. I saw between 350 and 380 on mine.
I'm glad to see the numbers are good. At least now I know that work put into the truck should not be in vain.

Originally Posted by scotttahoe
Sorry I wasn't on to help, I'm trying to put my motor back in and is fighting me bad.
No worries, good luck with getting the motor back in.

Here's the other side:


Cyll1 (450) :

Cyll3(450):

Cyll5(425):

Cyll7(450):



So next is injector O-Rings. Do I need some kind of pry bar to get them out? All I have is a pretty big one and it won't fit under the cowl....
 
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Old Sep 23, 2015 | 06:56 PM
  #284  
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Here's the only strange thing that I noticed. On cyll7 the glow plug adapter had a brownish fluid on it after the test. I did not notice anything on the glow plug.

It's Almost like an oil and water mix. My coolant is red, so I don't think it's coolant.

 
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Old Sep 23, 2015 | 07:25 PM
  #285  
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Great compression numbers!
 
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