Hey guys, been a long time reader of this forum for many years and the amount of information you all provide is amazing! I've learned so much but now I'm stuck trying to figure out which path to take with my truck.
I cracked a piston in my LBZ while towing. Tore it down, and had a little bit of scoring on the cylinder wall we were hoping to hone out. Well, the hone job ended up screwing up the cylinder so it now needs a boring job. Diesel mechanic family member who is helping me with this suggests just taking it down to local machine shop, boring it .10 or .20 over, whatever it takes, and putting that size piston in it, slapping it back together and calling it good (with the idea I drive this truck another year or two at most then sell it).
I think that is a horrible idea from all of the research I've done on here for a couple of reasons. Not a duramax specialist machine shop, meaning prob no torque plate for boring. They don't do any balance work (they can send it off they said), but my mechanic helper suggests that's not even all that necessary. But throwing one oversize piston in there without balancing seems like a horrible idea from what I've read for the long term and a potential disaster waiting to happen down the road.
So now I'm stuck on what to do. As far as I see it, I have several options.
- I've thought about just getting a new truck, but with them so hard to find right now and so dang expensive, the large monthly payment is kind of challenging for us and hard to justify.
- I can do a rebuild of this motor and we can do it ourselves. Send out machine work (hard to find a good duramax knowledgable shop around here tho). But I'm not really too fond of this option because of the time/amount of work it will take us and probable lack of expertise. We're really not performance engine builders and might not know all the tips and tricks for a dmax, even though my mechanic buddy has built a number of motors. This route has several options such as just over-boring the one bad cylinder, or doing all 8.
- Or I buy a short or long block replacement and put the rest together that way. Definitely like this option the most because of time/amount of work required. And I also trust a professional builder a bit more over us LOL. But it's also the most expensive. And if I go this route it means putting a good bit of money into the truck which means I need to keep it for a good number of years more. So I'm thinking of making it worthwhile on this route.
This is where I'd like to find a mildly built motor, upgrade to a built tranny and possibly even twin turbos. I already have EFI live with Rob's tunes (will prob need new tunes once all built), just bought new stock injectors, have lift pump, ProFab manifolds, ARP studs, EGR delete, exhaust, S&B air filter, PCV re-route, you know a bunch of those little things.
So I've been searching and searching but would really like your guys inputs. Does anyone have any suggestions for a mildly built short or long block? I'm not looking for anything too extreme and trying not to break the bank. The truck is a daily driver and we tow a good bit. Right now about a 10-12k horse trailer that we're hauling usually weekly. In Northern AZ, so we see some pretty good grades and some pretty high temps (AZ summers).
Ideally I'd love some upgraded pistons so I hopefully don't crack another. But I really don't need much else built too crazy I don't think. I'll be pushing the power up a bit with twins possibly but not wanting to have a super crazy HP truck where upgrading everything becomes necessary.
I'd like your thoughts on the following options / builders? (Hyperlinked names). Mainly, are any of these great builders, anyone I should stay away from, or are there some other reasonable options out there??
Motor: Ideally would like to be in the $6-7K range for a long block. Is this a reasonable expectation?
US Engine Production - Completely stock - $5549 - No upgrades, so might be worth a few thousand more to get some build out of it.
Modern Diesel Legion - Long Block with upgraded pistons - $4700 - Anyone heard of them or know anything about them? Worried this might be a little cheap to get a build done.
DFC Standard Long Block - $7167 - Can't tell if they upgrade much of anything in this build like pistons?
Choate Long Block Workhorse - $9595 - Seems like a pretty good builder with some decent upgrades.
DFC Tow/Haul Long Block - $10857 - Again, can't tell what they really upgrade?
Transmission: I feel any of these are good options for what I'm looking for.
Inglewood Juggernaut Jr - $5000 - 750 HP
SDP - $4,445 - 650 HP
Suncoast Guardian - $5595 - Unk HP
DmaxTuner - $3965 - 750 HP
Werhli - $5239 - 750 HP
Twins: Both seem to be top options
SDP - $3850 - S475 over stock
Werhli - $3744 - S475 over stock
I am so lost on what to do right now. I go back and forth with so many options and so I'm looking for a little bit of help, especially with the motor choices. So I'd greatly appreciate any help in advance! Thanks guys!!
I cracked a piston in my LBZ while towing. Tore it down, and had a little bit of scoring on the cylinder wall we were hoping to hone out. Well, the hone job ended up screwing up the cylinder so it now needs a boring job. Diesel mechanic family member who is helping me with this suggests just taking it down to local machine shop, boring it .10 or .20 over, whatever it takes, and putting that size piston in it, slapping it back together and calling it good (with the idea I drive this truck another year or two at most then sell it).
I think that is a horrible idea from all of the research I've done on here for a couple of reasons. Not a duramax specialist machine shop, meaning prob no torque plate for boring. They don't do any balance work (they can send it off they said), but my mechanic helper suggests that's not even all that necessary. But throwing one oversize piston in there without balancing seems like a horrible idea from what I've read for the long term and a potential disaster waiting to happen down the road.
So now I'm stuck on what to do. As far as I see it, I have several options.
- I've thought about just getting a new truck, but with them so hard to find right now and so dang expensive, the large monthly payment is kind of challenging for us and hard to justify.
- I can do a rebuild of this motor and we can do it ourselves. Send out machine work (hard to find a good duramax knowledgable shop around here tho). But I'm not really too fond of this option because of the time/amount of work it will take us and probable lack of expertise. We're really not performance engine builders and might not know all the tips and tricks for a dmax, even though my mechanic buddy has built a number of motors. This route has several options such as just over-boring the one bad cylinder, or doing all 8.
- Or I buy a short or long block replacement and put the rest together that way. Definitely like this option the most because of time/amount of work required. And I also trust a professional builder a bit more over us LOL. But it's also the most expensive. And if I go this route it means putting a good bit of money into the truck which means I need to keep it for a good number of years more. So I'm thinking of making it worthwhile on this route.
This is where I'd like to find a mildly built motor, upgrade to a built tranny and possibly even twin turbos. I already have EFI live with Rob's tunes (will prob need new tunes once all built), just bought new stock injectors, have lift pump, ProFab manifolds, ARP studs, EGR delete, exhaust, S&B air filter, PCV re-route, you know a bunch of those little things.
So I've been searching and searching but would really like your guys inputs. Does anyone have any suggestions for a mildly built short or long block? I'm not looking for anything too extreme and trying not to break the bank. The truck is a daily driver and we tow a good bit. Right now about a 10-12k horse trailer that we're hauling usually weekly. In Northern AZ, so we see some pretty good grades and some pretty high temps (AZ summers).
Ideally I'd love some upgraded pistons so I hopefully don't crack another. But I really don't need much else built too crazy I don't think. I'll be pushing the power up a bit with twins possibly but not wanting to have a super crazy HP truck where upgrading everything becomes necessary.
I'd like your thoughts on the following options / builders? (Hyperlinked names). Mainly, are any of these great builders, anyone I should stay away from, or are there some other reasonable options out there??
Motor: Ideally would like to be in the $6-7K range for a long block. Is this a reasonable expectation?
US Engine Production - Completely stock - $5549 - No upgrades, so might be worth a few thousand more to get some build out of it.
Modern Diesel Legion - Long Block with upgraded pistons - $4700 - Anyone heard of them or know anything about them? Worried this might be a little cheap to get a build done.
DFC Standard Long Block - $7167 - Can't tell if they upgrade much of anything in this build like pistons?
Choate Long Block Workhorse - $9595 - Seems like a pretty good builder with some decent upgrades.
DFC Tow/Haul Long Block - $10857 - Again, can't tell what they really upgrade?
Transmission: I feel any of these are good options for what I'm looking for.
Inglewood Juggernaut Jr - $5000 - 750 HP
SDP - $4,445 - 650 HP
Suncoast Guardian - $5595 - Unk HP
DmaxTuner - $3965 - 750 HP
Werhli - $5239 - 750 HP
Twins: Both seem to be top options
SDP - $3850 - S475 over stock
Werhli - $3744 - S475 over stock
I am so lost on what to do right now. I go back and forth with so many options and so I'm looking for a little bit of help, especially with the motor choices. So I'd greatly appreciate any help in advance! Thanks guys!!