300,000 plus miles easy on our Jaaaags
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Joined: Mar 2023
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From: Grimsby, ON
Great stuff!
When it comes to engine failure reasons... I've also been pretty interested in the topic since I had to have an AJ126 replaced at around 33 000 miles in another Jag many years ago now. That was due to a manufacturing quality issue that many early AJ126s suffered from but apart from that I think that the vast majority of engine failures of the AJ126/AJ133 simply boils down to owner neglect and/or ignorance.
If one of these engines fail it's mostly due to the current owner or some past owner not paying attention or doing stupid sh*t with the car. IMHO things to do to avoid serious issues:
When it comes to engine failure reasons... I've also been pretty interested in the topic since I had to have an AJ126 replaced at around 33 000 miles in another Jag many years ago now. That was due to a manufacturing quality issue that many early AJ126s suffered from but apart from that I think that the vast majority of engine failures of the AJ126/AJ133 simply boils down to owner neglect and/or ignorance.
If one of these engines fail it's mostly due to the current owner or some past owner not paying attention or doing stupid sh*t with the car. IMHO things to do to avoid serious issues:
- always apply mechanical sympathy
- be aware of any early signs of coolant system or injector issues
- always let it warm up during 15 minutes before driving it hard
- use proper gas and not some random cheap low octane junk
- drive it properly: not only short drives but also give it a longer run and an Italian tune-up at least every now and then
- use an injector cleaner every now and then
- garage it if you can
- carry out maintenance at least as frequently as prescribed by Jaguar
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From: Adelaide, South Australia
Drive it hard and fast, rev it to the red line often.
Just like an enthusiastic Italian driver would do.
Just like an enthusiastic Italian driver would do.
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From: connecticut
Also frequent short journeys can dilute the oil in an engine because the engine doesn't reach its optimal operating temperature, allowing unburned fuel to condense and mix with the oil, thinning it out and reducing its lubricating capabilities; this can lead to potential engine wear over time if not addressed by occasionally taking longer drives to fully heat up the engine.yes throw in a mild Italian tune up lol
Last edited by dennis black; Dec 29, 2024 at 12:54 AM.
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From: Luxembourg
Amen. By Italian tune up I meant to at least occasionally drive it pretty hard (obviously after a proper warm up) using all the power, gears and full rev range and not just sit at 1500 rpm on the highway for two hours. 
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From: Exit 30 in NorthWest NJ
https://bobistheoilguy.com/forums/
to look for any trends that might cause issues.
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