Considering a rebuild
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Im going to get to pulling the motor and see exactly what’s going on with it here soon. I hope that’s all it is
Hotshot
Joined: Mar 2012
Posts: 10,590
Likes: 382
From: Texas
Yeah, at sea level, they definitely should be higher. I was telling you previously because a friend of mine on here had compression numbers that were similar, but he is about 6000 feet. When he did the math, and I forget the formula, his numbers were actually pretty damn good. I was just making sure before you did a huge job that didn't need to be done, but it sounds like you are on the right path. Keep us posted!
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Yeah, at sea level, they definitely should be higher. I was telling you previously because a friend of mine on here had compression numbers that were similar, but he is about 6000 feet. When he did the math, and I forget the formula, his numbers were actually pretty damn good. I was just making sure before you did a huge job that didn't need to be done, but it sounds like you are on the right path. Keep us posted!
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
I’m thinking about just ordering a Mabbco long block and throwing it in there and rebuilding my current motor to put in another truck down the road. Has anyone had any experiences with Mabbco?
Hotshot
Joined: Mar 2012
Posts: 10,590
Likes: 382
From: Texas
@oldbird1965 did a Jasper and has had good luck with it. He works his pretty hard too. Maybe he'll chime in.
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
@oldbird1965 did a Jasper and has had good luck with it. He works his pretty hard too. Maybe he'll chime in.
Fleet Owner
Joined: Aug 2004
Posts: 20,419
Likes: 197
From: AZ
Like Byron said, I've had good luck with the Jasper motor. Good people like Byron offered to help me but I was at least 500 miles from his place. I had a hole in piston #8 and the guy at a diesel shop that was recommended to me said it would take a lot longer to rebuild my motor so I just had him get a Jasper. Pulls real hard and I'm happy so far, probably got about 20K on it pulling 18K.
Mountain Pass
Joined: Feb 2019
Posts: 121
Likes: 13
The previous owner of my truck had a ford reman long block installed part #(f7tz-6v006-barm). A ford dealer in Wyoming did the install.
The first ford engine he had installed threw a rod completely through the block within the first 3k miles. He claimed he was running 160/0 injectors and pushing it pretty hard.
Ford kicked and screamed but honored the warranty and gave home a new 7.3 longblock. The Previous owned had a new turbo installed and 8 new Alliant injectors with this motor
Since i purchased the truck the Ford reman is now at 18k miles and no issues so far
The first ford engine he had installed threw a rod completely through the block within the first 3k miles. He claimed he was running 160/0 injectors and pushing it pretty hard.
Ford kicked and screamed but honored the warranty and gave home a new 7.3 longblock. The Previous owned had a new turbo installed and 8 new Alliant injectors with this motor
Since i purchased the truck the Ford reman is now at 18k miles and no issues so far
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Lead Driver
Joined: Sep 2002
Posts: 9,520
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From: North Texas
Weak springs probably explains why my No 8 came up after I did Comp 910s and another reason I tell everyone to do them due to the miles we have and worn seats.
I would also retest with another gauge to verify numbers. Jarrett has a nice unit he may let you bum. Not too sure where you can find a leakdown that may work with the 7.3 DI glow plug hose, unless the HF or OTC (I think Jarrett has) will allow attachment to any universal gauge. I also prefer ones that read to 100...so math is easy in terms of percentage loss.
EDIT - I am not wonder if 6 and 7 being so low, that combustion could even occur.
I would also retest with another gauge to verify numbers. Jarrett has a nice unit he may let you bum. Not too sure where you can find a leakdown that may work with the 7.3 DI glow plug hose, unless the HF or OTC (I think Jarrett has) will allow attachment to any universal gauge. I also prefer ones that read to 100...so math is easy in terms of percentage loss.
EDIT - I am not wonder if 6 and 7 being so low, that combustion could even occur.
Thread Starter
|
Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Like Byron said, I've had good luck with the Jasper motor. Good people like Byron offered to help me but I was at least 500 miles from his place. I had a hole in piston #8 and the guy at a diesel shop that was recommended to me said it would take a lot longer to rebuild my motor so I just had him get a Jasper. Pulls real hard and I'm happy so far, probably got about 20K on it pulling 18K.
Thread Starter
|
Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
The previous owner of my truck had a ford reman long block installed part #(f7tz-6v006-barm). A ford dealer in Wyoming did the install.
The first ford engine he had installed threw a rod completely through the block within the first 3k miles. He claimed he was running 160/0 injectors and pushing it pretty hard.
Ford kicked and screamed but honored the warranty and gave home a new 7.3 longblock. The Previous owned had a new turbo installed and 8 new Alliant injectors with this motor
Since i purchased the truck the Ford reman is now at 18k miles and no issues so far
The first ford engine he had installed threw a rod completely through the block within the first 3k miles. He claimed he was running 160/0 injectors and pushing it pretty hard.
Ford kicked and screamed but honored the warranty and gave home a new 7.3 longblock. The Previous owned had a new turbo installed and 8 new Alliant injectors with this motor
Since i purchased the truck the Ford reman is now at 18k miles and no issues so far
Thread Starter
|
Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Weak springs probably explains why my No 8 came up after I did Comp 910s and another reason I tell everyone to do them due to the miles we have and worn seats.
I would also retest with another gauge to verify numbers. Jarrett has a nice unit he may let you bum. Not too sure where you can find a leakdown that may work with the 7.3 DI glow plug hose, unless the HF or OTC (I think Jarrett has) will allow attachment to any universal gauge. I also prefer ones that read to 100...so math is easy in terms of percentage loss.
EDIT - I am not wonder if 6 and 7 being so low, that combustion could even occur.
I would also retest with another gauge to verify numbers. Jarrett has a nice unit he may let you bum. Not too sure where you can find a leakdown that may work with the 7.3 DI glow plug hose, unless the HF or OTC (I think Jarrett has) will allow attachment to any universal gauge. I also prefer ones that read to 100...so math is easy in terms of percentage loss.
EDIT - I am not wonder if 6 and 7 being so low, that combustion could even occur.
Thread Starter
|
Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
They're still off. I’m going to try and spin them when I get home! I do know that the rocker arms move some on like 6 cylinders though
Logistics Pro
Joined: Mar 2007
Posts: 4,579
Likes: 837
From: knoxville, tn
There is a chance that Eric is pointing you in the right direction on the valve springs. Without good seat pressure you will get low compression numbers and the other symptoms you are experiencing.
Its not a guaranteed fix but definitely something to check before pulling the motor.
Its not a guaranteed fix but definitely something to check before pulling the motor.