Bad Piston? Please advise!!
#21
Join Date: Feb 2014
Location: Adelaide, South Australia
Posts: 8,463
Received 3,226 Likes
on
2,380 Posts
The following users liked this post:
Mark F-Type V6 (08-24-2023)
#22
Hello Board
I have a 2015 F-Type S convertible. The car has 53,249 miles. I've just been informed by my dealer that I need a NEW ENGINE. This news is obviously devastating. They are telling me that the middle cylinder on the drivers side is bad. I have no other info if it's a damaged cylinder or if it's the piston or piston ring. I'm hoping that the piston rings can be replaced opposed to me buying a whole new engine. Please click the link to watch the video from my service tech. Please advise. Technician video
My dealer also upgraded my ECU without asking me. This completely changed the vehicle. As others have said, the pops and cracks are gone, shift points are different, and it's just a complete different vehicle to drive. My dealer is telling me to continue driving the vehicle and it will return back to normal. Is this true?
I have a 2015 F-Type S convertible. The car has 53,249 miles. I've just been informed by my dealer that I need a NEW ENGINE. This news is obviously devastating. They are telling me that the middle cylinder on the drivers side is bad. I have no other info if it's a damaged cylinder or if it's the piston or piston ring. I'm hoping that the piston rings can be replaced opposed to me buying a whole new engine. Please click the link to watch the video from my service tech. Please advise. Technician video
My dealer also upgraded my ECU without asking me. This completely changed the vehicle. As others have said, the pops and cracks are gone, shift points are different, and it's just a complete different vehicle to drive. My dealer is telling me to continue driving the vehicle and it will return back to normal. Is this true?
Gees, this is heavy going.
Could you put the whole picture in Chronological order from the beginning.
I am imaging something like this.
- Car taken in for CW front Y pipe renewal for Leakage of the forward CW pipes?
- Dealer replaces said CW pipes, and water pump.
- Also changes the ECU software ? nice but why??.
- Owner gets car returned and drives crap.
- Car returned to dealer for investigation.
Some questions.
- How long was the car at the dealer changing out the CW pipes and the water pump? (Busy dealer and milk it, a bit so about 2 weeks+.)
- What codes were found before and after the CW Y pipe change out?
Possible, Plausible Explanation.
I would suggest, with the engine being open and the fuel system being depressurised for extended time? (2 weeks plus). Outside cold and/or dampish air with the supercharger off, HP fuel pipe removed etc.
The No.5 Cylinder injector, and may be more, have gone bad, sticking. LH bank mid. etc. may be more in the beginning due to moisture etc.
Dealer finds in runs badly, and changes the ECU program to smooth it out, hide it etc.
Good enough to get it out the shop, without engine light while it continues to drive badly, and pumps fuel into Cylinder No.5 melting the piston top.
Returned to dealer, and new engine required.
So, all engine codes, and boroscope of the No.5 piston crown please.
Miles driven since Y pipe replacement.
Depending on the feed back, you may have to have an independent engineers write a report on the car condition and finds and suggest the dealer replace the engine. This could be tricky without all the evidence being available.
Yes a V5 would drive differently.
#23
You are mistaken on a couple of things.
Firstly, the F-Type came out in 2013 and was designed well after Ford sold Jaguar (and Land Rover) to TATA in 2008.
Secondly, the AJ133 V8 and the AJ126 V6 (which is based on the V8) were designed completely in-house by JLR and have NOTHING to do with any Ford engine!
Not the Coyote 5.0 V8, not the Duratec 3.0 V6. The AJ133 came out in 2009 and the AJ126 in 2012.
As I have explained countless times the confusion arises because the AJ133 and AJ126 were both initially built in a part of the Ford engine plant in Bridgend (Wales UK) under a deal between JLR and Ford, and as a result of this many parts on these engines are stamped "FoMoCo". That deal expired in Dec 2020 and production of these engines was moved to JLRs new engine plant in Wolverhampton.
There MAY have been SOME Ford input to the design of the AJ133, seeing as it came out in 2009 and Ford sold JLR to TATA in 2008, but I have never seen or read of any concrete evidence either way. Neither engine has ever been factory fitted to a non-JLR vehicle.
Firstly, the F-Type came out in 2013 and was designed well after Ford sold Jaguar (and Land Rover) to TATA in 2008.
Secondly, the AJ133 V8 and the AJ126 V6 (which is based on the V8) were designed completely in-house by JLR and have NOTHING to do with any Ford engine!
Not the Coyote 5.0 V8, not the Duratec 3.0 V6. The AJ133 came out in 2009 and the AJ126 in 2012.
As I have explained countless times the confusion arises because the AJ133 and AJ126 were both initially built in a part of the Ford engine plant in Bridgend (Wales UK) under a deal between JLR and Ford, and as a result of this many parts on these engines are stamped "FoMoCo". That deal expired in Dec 2020 and production of these engines was moved to JLRs new engine plant in Wolverhampton.
There MAY have been SOME Ford input to the design of the AJ133, seeing as it came out in 2009 and Ford sold JLR to TATA in 2008, but I have never seen or read of any concrete evidence either way. Neither engine has ever been factory fitted to a non-JLR vehicle.
There is a real mystery as to when OP's cylinder was damaged, agree boroscope inspection by independent 3rd party to verify possible cause would be interesting. Based on what you've suggested, it seems like you have a compelling reason to escalate to this dealer's General Manager and if able to document, possibly JLR NA. I do not know how amenable the parties will be, but with enough evidence and well propositioned history, I think you have a case.
Last edited by dmchao; 08-24-2023 at 09:05 AM.
#24
#25
Just logged in today after a long, long time. This failure is exactly the same as I had at 38,000 miles. Someone else on this forum experienced the exact same thing. Inserting a bore scope in the plug hole of the 0psi compression cylinder will probably reveal a hole in the top of the piston with none of the usual evidence that might indicate detonation. Some of the early F-Type AJ126 engines were well equipped with flawed pistons. Jag is well aware of this issue. The dealer may not be. In my case, even though the car was 6 months out of warranty, they chose to do a free engine replacement. Get the bore scope work done.
#26
The following users liked this post:
DJS (08-28-2023)
#27
Thread
Thread Starter
Forum
Replies
Last Post
jetsetter883
F-Type ( X152 )
23
06-02-2021 02:56 PM
P5EUDO
XJ XJ8 / XJR ( X308 )
5
08-02-2016 06:24 AM
MirEgal
S-Type / S type R Supercharged V8 ( X200 )
36
06-30-2012 09:44 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)