Lq9 to l96
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Teching In
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Lq9 to l96 Have a 2008 isuzu npr with a 6.0 8th digit in vin is n.
looking for a new crate oem motor and all I can come across new is l96 Part number 19416591. It’s showing vin code n is a lq9. Any way the l96 would swap over?
looking for a new crate oem motor and all I can come across new is l96 Part number 19416591. It’s showing vin code n is a lq9. Any way the l96 would swap over?
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From: Central Cal.
Are you just looking for a stock replacement engine?
A stock L96 has 360HP and 9.6:1 compression which matches the compression of an LQ4 which is what is in your Isuzu now, even though it wasn't made after 07.
You might have an L96 in it now.
You do NOT have an LQ9 in it as equipped. It was strictly a performance truck engine put only in GM trucks, not Isuzus.
A stock L96 has 360HP and 9.6:1 compression which matches the compression of an LQ4 which is what is in your Isuzu now, even though it wasn't made after 07.
You might have an L96 in it now.
You do NOT have an LQ9 in it as equipped. It was strictly a performance truck engine put only in GM trucks, not Isuzus.
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From: Central Cal.
Then find a reman LQ9. You won't find new crate stock LQ9's as they are no longer made
The LQ9 was a higher compression LQ4. I doubt they put that high a compression engine in Isuzu work trucks.
They usually came with the LQ4, which is what I bet you have.
The LQ9 was a higher compression LQ4. I doubt they put that high a compression engine in Isuzu work trucks.
They usually came with the LQ4, which is what I bet you have.
Teching In
Joined: Jul 2017
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From: Northeast Louisiana
One other thing to keep in mind is your truck has the 24x reluctor the newer engines have 58x.
How are you using your truck? What kind of back does it have on it? Flat bed/box truck?
What are you wanting to get out of the new engine.
How are you using your truck? What kind of back does it have on it? Flat bed/box truck?
What are you wanting to get out of the new engine.
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Thread Starter
Teching In
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We just checked it’s a 58x, they put 58 after Jan 06. I don’t want a reman never had good luck, I just want a oem 6.0 that will be similar and the only new oem I could find is a l96. I have 12 of these box trucks that stay on the road and constantly worked hard.
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Joined: Jul 2017
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From: Northeast Louisiana
Since you are doing this to maintain your fleet I know you want this to be a one and done thing.
I was personally under the impression that ALL LQ4/LQ9 engines were 24x. Not sure if I missed later on they were swapped to 58x or if that was just a for those Isuzu trucks.
if you want too that can be personally checked out by looking at the sensor on n the side of the block. Grey color 58x, black color 24x.
other things to consider.
look at the front cover to see if the engine you are getting or have has VVT
look to see if the engine you have or getting has DOD lifters.
is your set up drive by wire or drive by cable?
3 bolt vs 4 bolt throttle body.
oil pan, windage tray and oil pickup tube.
Cathedral port heads vs Rectangular port heads, the intakes don’t interchange with out a adapter.
just trying to throw a few things up there so there is less possibility of something being wrong while swapping.
I was personally under the impression that ALL LQ4/LQ9 engines were 24x. Not sure if I missed later on they were swapped to 58x or if that was just a for those Isuzu trucks.
if you want too that can be personally checked out by looking at the sensor on n the side of the block. Grey color 58x, black color 24x.
other things to consider.
look at the front cover to see if the engine you are getting or have has VVT
look to see if the engine you have or getting has DOD lifters.
is your set up drive by wire or drive by cable?
3 bolt vs 4 bolt throttle body.
oil pan, windage tray and oil pickup tube.
Cathedral port heads vs Rectangular port heads, the intakes don’t interchange with out a adapter.
just trying to throw a few things up there so there is less possibility of something being wrong while swapping.
Teching In
Joined: Jul 2017
Posts: 15
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From: Northeast Louisiana
ok, so 58x, not sure if that was a Isuzu thing or they did that across the board. My personal LQ9 is a 24x 2004 model so I didn’t keep up with it past that.
Also do you know what injector size your original engine has?
that replacement engine you are looking at I think has the larger flex fuel injectors and VVT.
Also do you know what injector size your original engine has?
that replacement engine you are looking at I think has the larger flex fuel injectors and VVT.
Last edited by safjist_nipnog; Aug 21, 2022 at 12:37 PM.
TECH Senior Member
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From: Central Cal.
ok, so 58x, not sure if that was a Isuzu thing or they did that across the board. My personal LQ9 is a 24x 2004 model so I didn’t keep up with it past that.
Also do you know what injector size your original engine has?
that replacement engine you are looking at I think has the larger flex fuel injectors and VVT.
Also do you know what injector size your original engine has?
that replacement engine you are looking at I think has the larger flex fuel injectors and VVT.
No Gen IV 6.0 truck engines come without VVT.
I would source a reputable reman LQ4.
TECH Senior Member
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From: Central Cal.
Because the LQ9 has over 10:1 compression and I know Isuzu didn't use those in work truck trucks without specifying at least 91 octane fuel, and they have never done that.
You say the VIN has an "N" which, in a GM truck, indicates an LQ9. You do NOT have a GM truck. It is an Isuzu truck with a GM engine. Different animal with different VIN's.
You say the VIN has an "N" which, in a GM truck, indicates an LQ9. You do NOT have a GM truck. It is an Isuzu truck with a GM engine. Different animal with different VIN's.
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
Pull the heads off the old one. If pistons are dished, it's an LQ4. Flat tops, LQ9.
Last edited by G Atsma; Aug 21, 2022 at 08:32 PM.
