3.0t vs 5.0
#1
03-09-2019, 06:58 AM
3.0t vs 5.0
I'm looking at either a 12 xj with a 5.0 or a 2013 with a 3.0t.
I do a ton of driving for work so I need the most reliable vehicle. It's my understanding that the 5.0 engine has cam tensioners and head gasket problems with higher mileage. Is the same to be said for the 3.0 t motor? If not are there any issues other than the water pumps? Thanks
I do a ton of driving for work so I need the most reliable vehicle. It's my understanding that the 5.0 engine has cam tensioners and head gasket problems with higher mileage. Is the same to be said for the 3.0 t motor? If not are there any issues other than the water pumps? Thanks
#2
03-09-2019, 09:24 AM
Its pretty much the same motor. The literally just leave two pistons out of the block, blank off those cylinders and replace them with a supercharger to make up the lost power, well some of it anyway. They had to use a split-pin crankshaft to make a 90 degree v6 balance, or somewhat anyway.
https://www.caranddriver.com/news/a1...ers-redundant/
Granted, JLR did continually make small improvements to both engines over the years and so some of the flaws with an early 5.0 will not be found in the later 3.0 but I've been reading these forums for years and I haven't noticed that one engine has more trouble posts than the other. It's probably marginally safer to get the newer 2013, but it only puts many of the the same repairs off by a year and adds potential supercharger issues. If its already down to a choice between two particular cars, I would encourage you to put much more weight on the maintenance history and mileage, rather than theoretically which engine is going to be more reliable. I'd lean toward the one with the lowest miles but if one always had its fluids changed on schedule at the dealer and the other was serviced randomly at Mr Goodwrench....
Personally I bought a 2012 because I figured that when its time to update my daily driver again to something newer, I won't have the choice of a v8 anymore. I spent months hunting down an extremely low mileage example. The last of the dinosaurs.
https://www.caranddriver.com/news/a1...ers-redundant/
Granted, JLR did continually make small improvements to both engines over the years and so some of the flaws with an early 5.0 will not be found in the later 3.0 but I've been reading these forums for years and I haven't noticed that one engine has more trouble posts than the other. It's probably marginally safer to get the newer 2013, but it only puts many of the the same repairs off by a year and adds potential supercharger issues. If its already down to a choice between two particular cars, I would encourage you to put much more weight on the maintenance history and mileage, rather than theoretically which engine is going to be more reliable. I'd lean toward the one with the lowest miles but if one always had its fluids changed on schedule at the dealer and the other was serviced randomly at Mr Goodwrench....
Personally I bought a 2012 because I figured that when its time to update my daily driver again to something newer, I won't have the choice of a v8 anymore. I spent months hunting down an extremely low mileage example. The last of the dinosaurs.
#3
03-10-2019, 01:20 AM
I have seen the TSB for the Land Rover tensioners between 2010-2012 (LTB00474NAS2), but not a related Jaguar one. I would love to see it too, but understand Jaguar never released a TSB for this despite it being a recognized issue. I would assume the 2012 has the issue and that it is a matter of miles until the service is needed.
Is the 2012 a NA engine or also a S/C one? The 5L s/c engine hides the infamous Y-shaped coolant pipe that runs under the supercharger. Im not sure if it is the same on the smaller engine, but it makes changing that coolant tube pretty labor intensive. I don’t see the 3L engine s/c included on the TSB for the isolator spring issue (JTB00349v2). Must just be an issue with the 5L s/c. If so, then the s/c on the 2013 appears to be less problematic than the ones on the larger engines. Does anyone know if the supercharger is different on this model?
Is the 2012 a NA engine or also a S/C one? The 5L s/c engine hides the infamous Y-shaped coolant pipe that runs under the supercharger. Im not sure if it is the same on the smaller engine, but it makes changing that coolant tube pretty labor intensive. I don’t see the 3L engine s/c included on the TSB for the isolator spring issue (JTB00349v2). Must just be an issue with the 5L s/c. If so, then the s/c on the 2013 appears to be less problematic than the ones on the larger engines. Does anyone know if the supercharger is different on this model?
#4
03-10-2019, 04:57 AM
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I have seen the TSB for the Land Rover tensioners between 2010-2012 (LTB00474NAS2), but not a related Jaguar one. I would love to see it too, but understand Jaguar never released a TSB for this despite it being a recognized issue. I would assume the 2012 has the issue and that it is a matter of miles until the service is needed.
Is the 2012 a NA engine or also a S/C one? The 5L s/c engine hides the infamous Y-shaped coolant pipe that runs under the supercharger. Im not sure if it is the same on the smaller engine, but it makes changing that coolant tube pretty labor intensive. I don’t see the 3L engine s/c included on the TSB for the isolator spring issue (JTB00349v2). Must just be an issue with the 5L s/c. If so, then the s/c on the 2013 appears to be less problematic than the ones on the larger engines. Does anyone know if the supercharger is different on this model?
Is the 2012 a NA engine or also a S/C one? The 5L s/c engine hides the infamous Y-shaped coolant pipe that runs under the supercharger. Im not sure if it is the same on the smaller engine, but it makes changing that coolant tube pretty labor intensive. I don’t see the 3L engine s/c included on the TSB for the isolator spring issue (JTB00349v2). Must just be an issue with the 5L s/c. If so, then the s/c on the 2013 appears to be less problematic than the ones on the larger engines. Does anyone know if the supercharger is different on this model?
Different JTB because the supercharger is different, Eaton TVS R1900 on the 5.0 and the smaller Eaton TVS R1320 on the 3.0.
#6
03-10-2019, 11:40 PM
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#7
03-11-2019, 10:39 PM
Fair enough, but what do you think is more reliable? It sounds like tensioners vs supercharger.
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#8
03-11-2019, 11:31 PM
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I think there might be some confusion here.
The OP said, quote: "I'm looking at either a 12 xj with a 5.0 or a 2013 with a 3.0t".
There is no such thing as a 3.0t (turbo) XJ in the US, as the 3.0 turbo is a diesel and no diesel Jag has ever been sold in the US.
The OP probably meant the 3.0 SC, which as pdupler says is very much a cut down 5.0 (although it's a bit more than just lopping off and blanking off two cylinders as both the bore and stroke of the 3.0 are smaller). Around 2013/2014 the 5.0 NA was dropped in the XJ and replaced by the 3.0 SC, in fact they put out the exact same quoted bhp, 375.
The 2012 5.0 NA is arguably more reliable than the 2013 3.0 SC simply because it is NA vs forced induction and therefore less stressed.
The OP said, quote: "I'm looking at either a 12 xj with a 5.0 or a 2013 with a 3.0t".
There is no such thing as a 3.0t (turbo) XJ in the US, as the 3.0 turbo is a diesel and no diesel Jag has ever been sold in the US.
The OP probably meant the 3.0 SC, which as pdupler says is very much a cut down 5.0 (although it's a bit more than just lopping off and blanking off two cylinders as both the bore and stroke of the 3.0 are smaller). Around 2013/2014 the 5.0 NA was dropped in the XJ and replaced by the 3.0 SC, in fact they put out the exact same quoted bhp, 375.
The 2012 5.0 NA is arguably more reliable than the 2013 3.0 SC simply because it is NA vs forced induction and therefore less stressed.
#9
03-15-2019, 10:15 AM
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