XK / XKR ( X150 ) 2006 - 2014

Aftermarket vs OEM Radiator reliability, better options?

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Old Feb 24, 2026 | 07:16 PM
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Default Aftermarket vs OEM Radiator reliability, better options?

So one of my 3 Jags has sprung a leak on the plastic housing of the radiator on the 5.0sc. Tried repairing but no luck .
From my research I found Mehl and Behr are manufacturers but are known for leaks. Wondering from the collective experience of this group if these are the best options or maybe there are better alternative from the aftermarket ?
 
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2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 112.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 SC (Alpha Jag ECU, TCU tune, crank pulley), 600+ HP, 11.6 sec 1/4th mi 122mph, 7.6sec 1/8th mi
2018 Jaguar F-Type (AlphaJag ECU TCU, lower upper pulleys intake) 10.77 ,131mph ,700hp
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Old Mar 2, 2026 | 05:27 PM
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No one?
 
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2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 112.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 SC (Alpha Jag ECU, TCU tune, crank pulley), 600+ HP, 11.6 sec 1/4th mi 122mph, 7.6sec 1/8th mi
2018 Jaguar F-Type (AlphaJag ECU TCU, lower upper pulleys intake) 10.77 ,131mph ,700hp
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Old Mar 2, 2026 | 06:27 PM
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I've no idea about any fitting radiators, but I have had radiators custom build for race cars in the distant past.
I do know you can order custom radiators still, but zero idea on the price point.
 
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Old Mar 3, 2026 | 07:32 AM
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Put in a Mehl or Behr, and use a waterless coolant or Evans Racing, to avoid the 15 psi pressure.
 
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Old Mar 3, 2026 | 10:06 AM
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I you use Evans waterless, you could keep your OEM radiator and do another repair. JB weld over nylon screening or something. I dunno.
 
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Old Mar 9, 2026 | 04:02 PM
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I’d try repairing the plastic. I’ve had good luck on plastic repairs, like the mounting stud in the air box, with the superglue & baking soda mix.

Clean the surface well.
Spead super glue over the damaged area.
sprinkle baking soda over the superglue. It will bond well, and harden like steel.
do a few layers,


 
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Old Mar 11, 2026 | 01:33 AM
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Originally Posted by XKDreams
I’d try repairing the plastic. I’ve had good luck on plastic repairs, like the mounting stud in the air box, with the superglue & baking soda mix.

Clean the surface well.
Spead super glue over the damaged area.
sprinkle baking soda over the superglue. It will bond well, and harden like steel.
do a few layers,
Already tried zip tie plastic welding method but it keeps in leaking and cracking in the newly welded plastic . I give up 😆
 
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2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 112.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 SC (Alpha Jag ECU, TCU tune, crank pulley), 600+ HP, 11.6 sec 1/4th mi 122mph, 7.6sec 1/8th mi
2018 Jaguar F-Type (AlphaJag ECU TCU, lower upper pulleys intake) 10.77 ,131mph ,700hp
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Old Mar 11, 2026 | 09:55 AM
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There are plenty of 5.0 models in boneyards across the country and many with low miles. I assume you're looking for one for you 2013 XJ? Hell that one got you 13 years. Go used, low mileage.
 
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Old Mar 11, 2026 | 04:32 PM
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they are out there...

think of it as a treasure hunt!
 
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