V6 SC engine failure
#1
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Just got my XF back today after a new engine was installed.
No issues with the warranty and I was provided with a new JLR loaner vehicle for the entire period required for the repair, four weeks.
The engine suddenly failed internally exhibiting knocking, misfiring and oil burning dumping oil into the left bank catalytic converter which was also then replaced. Cold oil pressure at idle remained within spec at 40 psi and even after the failure the sump was only 0.5 litre low, just at the first add oil stage. Most of that missing oil was blown into the exhaust. Before the failure oil consumption was effectively zero.
The supercharger snout was also replaced due to play in the coupler. Anyone with a supercharged engine might be wise to specifically ask for this to be checked at each regular service as the couplers are known to be a weak link.
A new water pump was fitted as the original was beginning to leak, a problem previously noted by others.
Pretty impressed by Jaguar's service despite this serious defect.
Still love this car.
No issues with the warranty and I was provided with a new JLR loaner vehicle for the entire period required for the repair, four weeks.
The engine suddenly failed internally exhibiting knocking, misfiring and oil burning dumping oil into the left bank catalytic converter which was also then replaced. Cold oil pressure at idle remained within spec at 40 psi and even after the failure the sump was only 0.5 litre low, just at the first add oil stage. Most of that missing oil was blown into the exhaust. Before the failure oil consumption was effectively zero.
The supercharger snout was also replaced due to play in the coupler. Anyone with a supercharged engine might be wise to specifically ask for this to be checked at each regular service as the couplers are known to be a weak link.
A new water pump was fitted as the original was beginning to leak, a problem previously noted by others.
Pretty impressed by Jaguar's service despite this serious defect.
Still love this car.
#2
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My local dealership here in San Diego was also reporting a few bottom end failures in the 3.0L supercharged engines. I wonder if there is an underlying design issue in these motors.
Glad to hear everything is back to normal for your XF. It's also great to see someone take a situation like this in stride. Usually people start to bash Jaguar for any issue they encounter.
Glad to hear everything is back to normal for your XF. It's also great to see someone take a situation like this in stride. Usually people start to bash Jaguar for any issue they encounter.
#3
#4
#5
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When Ford supercharged their 3.8 for the Thunderbird years ago, they had to beef up the bottom end. Expect Jaguar did the same - hope it was enough. Disconcerting that your damage didn't show in a loss of oil pressure. But glad to hear Jaguar stood by their warranty - that was really major.
#7
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There have been very few reports of the supercharged 4.2 V8 failing, on this board but nowhere else.
I am curious whether the balance shaft mechanism might be the cause since that's the only significant difference between the V6 and the V8.
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jaguny (06-09-2015)
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#8
#9
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You either have one of the very few bad ones in which case it's going to fail soon or more likely you have a good one and it will run forever.
Nobody in the service shop was surprised to see my failed engine but they have replaced only a few.
#10
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They just fail for no obvious reason. I drive mine hard but nobody asked me about that.
You either have one of the very few bad ones in which case it's going to fail soon or more likely you have a good one and it will run forever.
Nobody in the service shop was surprised to see my failed engine but they have replaced only a few.
You either have one of the very few bad ones in which case it's going to fail soon or more likely you have a good one and it will run forever.
Nobody in the service shop was surprised to see my failed engine but they have replaced only a few.
#11
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I imagine the dealerships have been informed. I am quite sure Jaguar won't say even if asked.
I was very impressed that I received no push back whatsoever from Jaguar. They accepted the fault as covered by the warranty with not a single question asked.
I am on very good terms with the shop staff at my local dealer (customer since 1980) so when they tell me they've had a few failures like this I accept that. Still, despite my good relationship I'm not being told what the fault was.
From the symptoms I suspect piston failure.
I was very impressed that I received no push back whatsoever from Jaguar. They accepted the fault as covered by the warranty with not a single question asked.
I am on very good terms with the shop staff at my local dealer (customer since 1980) so when they tell me they've had a few failures like this I accept that. Still, despite my good relationship I'm not being told what the fault was.
From the symptoms I suspect piston failure.
#12
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my xf 3.0 sc with 84,000 km just blew up... a very bad knock started on the highway...immediately pulled over and the knocking was very loud and very obvious sounding rod or crank bearing .... before this the car ran flawlessly is in mint condition and fully OCD maintenance..oils, fluids, cooling everything....great engine when running but now i’m nervous as it’s a 18k fix..... my xkr has 160,000 km with zero issues
plus the six sounds like ****....stuck it a hard place.
otherwise i love the XF ...it drives incredibly well....until it implodes....
plus the six sounds like ****....stuck it a hard place.
otherwise i love the XF ...it drives incredibly well....until it implodes....
![Frown](https://www.jaguarforums.com/forum/images/smilies/frown.gif)
#13
#14
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My local dealership here in San Diego was also reporting a few bottom end failures in the 3.0L supercharged engines. I wonder if there is an underlying design issue in these motors.
Glad to hear everything is back to normal for your XF. It's also great to see someone take a situation like this in stride. Usually people start to bash Jaguar for any issue they encounter.
Glad to hear everything is back to normal for your XF. It's also great to see someone take a situation like this in stride. Usually people start to bash Jaguar for any issue they encounter.
#15
Join Date: Feb 2014
Location: Adelaide, South Australia
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i believe there is an issue.... mine blew up without warning ever abused perfectly maintained...i keep seeing these little v6 engines with catastrophic failure....not cool when you spend 50k on a car....i would love to hear from Jaguar on this issue...it appears like they are dropping this engine in the next 2 years...wonder why...
Same with the AJ133 V8.
Also the V6 has been slated to be replaced by an Ingenium I6 for a few years now, it's just that JLR have been a bit slow to bring the I6 into production.
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