Tappets
#1
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Sooo, I changed out my supercharger and got rid of that noise and now I have the final 'Noise' to deal with, which my mechanics are telling me is probably a/the tappet(s).
They also tell me that it would probably mean an 'engine out' to get it done, which to be honest makes me very nervous.. It is not so much the cost, which would probably be considerable, but once I go down that road, I am always wary about everything going back in right....
More good news about tappets apparently is that on our engine, they are all different sizes and until the head is off and they can actually see them, then they can't order the replacements?
Has anybody had any tappet problems? Is what they are telling me right? How did you fix it? Should I go get a 2nd, and/or 3rd opinion?
From what information I can gather, I can just carry on regardless (it has always made this noise and I have put 20K KM on it since I have had it), is that wise..
OMG I am full of questions today..
They also tell me that it would probably mean an 'engine out' to get it done, which to be honest makes me very nervous.. It is not so much the cost, which would probably be considerable, but once I go down that road, I am always wary about everything going back in right....
More good news about tappets apparently is that on our engine, they are all different sizes and until the head is off and they can actually see them, then they can't order the replacements?
Has anybody had any tappet problems? Is what they are telling me right? How did you fix it? Should I go get a 2nd, and/or 3rd opinion?
From what information I can gather, I can just carry on regardless (it has always made this noise and I have put 20K KM on it since I have had it), is that wise..
OMG I am full of questions today..
#2
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My guess is that's what your mechanic (tech) is doing, guessing .
I would be surprised if it's tappet noise,
AJ133 / AJ126 engine seems to be a little noisy, if supercharger has been replaced with new or good quality refurbished then I would suggest taking to a tech who has experience / training on this engine.
My wild guess would be check for direct injection pump as it makes noise that can be similar to tappet noise.
There's a technical bulletin (TSB) regarding noisy injection pump.
Will attach when I find it
Got the TSB from this forum
I would be surprised if it's tappet noise,
AJ133 / AJ126 engine seems to be a little noisy, if supercharger has been replaced with new or good quality refurbished then I would suggest taking to a tech who has experience / training on this engine.
My wild guess would be check for direct injection pump as it makes noise that can be similar to tappet noise.
There's a technical bulletin (TSB) regarding noisy injection pump.
Will attach when I find it
Got the TSB from this forum
#4
![Default](/forum/images/icons/icon1.gif)
My guess is that's what your mechanic (tech) is doing, guessing .
I would be surprised if it's tappet noise,
AJ133 / AJ126 engine seems to be a little noisy, if supercharger has been replaced with new or good quality refurbished then I would suggest taking to a tech who has experience / training on this engine.
My wild guess would be check for direct injection pump as it makes noise that can be similar to tappet noise.
There's a technical bulletin (TSB) regarding noisy injection pump.
Will attach when I find it
Got the TSB from this forum
I would be surprised if it's tappet noise,
AJ133 / AJ126 engine seems to be a little noisy, if supercharger has been replaced with new or good quality refurbished then I would suggest taking to a tech who has experience / training on this engine.
My wild guess would be check for direct injection pump as it makes noise that can be similar to tappet noise.
There's a technical bulletin (TSB) regarding noisy injection pump.
Will attach when I find it
Got the TSB from this forum
SC is brand new and is no longer making the 'Thock' noise that was contributing to the melee!
I mean maybe it is me being super picky, but the noise is noticeable as far as I am concerned.....
#5
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I will do, going out of town on business tomorrow so I will do it when I get back..
Did they have to take out your engine to fix it?
#6
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They had the car for around 2-3 weeks so they must have done, will provide you with all the details when we get a chance to speak/WhatsApp
#7
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This forum is too relaxed about tuning. Could you share your story so it can be used to warn others? Post it in this thread: https://www.jaguarforums.com/forum/f...tuning-206030/
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#8
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I didn't know tappet noise could be a problem on these modern engines. They were a big problem on the old 4.2 inline six engines back in the day. They required a stake-down kit to keep them from popping out. The engine sounded like a really loud sewing machine when they were on their way out.
#9
#10
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I didn't know tappet noise could be a problem on these modern engines. They were a big problem on the old 4.2 inline six engines back in the day. They required a stake-down kit to keep them from popping out. The engine sounded like a really loud sewing machine when they were on their way out.
#11
#12
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A combination of direct injection high fuel pressure injector "tick", the high pressure fuel pumps themselves and some but not all having a slightly rattly supercharger (coupler and/or tensioner). I have never heard of the classic old time tappet noise being a problem on these engines.
#13
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The forum is a relatively small sample size; so if I had this issue it wouldn't surprise me if there were enough out there to consider this "common". Something to note as well, my car was tuned before this failure, and the dealer did the repair work regardless.
#14
#15
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Mine was a light (much less noticeable) ticking noise that was of course RPM dependent. The dealership replaced the supercharger on the first go around, and considered the car "fixed" as their technician didn't hear anything on his test drive. I assume that was just because he doesn't drive V8 F-types regularly, but its a good example of how subtle my noise was. Yours seems much more severe and almost inconsistent; could be something else, but still bad.
#16
#17
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Long story short, the 'Brand New' replacement SC that I bought ended up being a knackered refurb (looked brand new from the outside, was in proper new JLR box), sooo, I put my old one back on and got my rattle back..
I am going to replace the coupler (the nose is new) and was wondering if anybody had bought one of these new 'Solid' ones?
https://www.ebay.com/itm/New-Genuine...97.m4902.l9144
They are supposed to be genuine OEM from Eaton, but as above, I have been down that road before....
Or should I stick to the original?
I am going to replace the coupler (the nose is new) and was wondering if anybody had bought one of these new 'Solid' ones?
https://www.ebay.com/itm/New-Genuine...97.m4902.l9144
They are supposed to be genuine OEM from Eaton, but as above, I have been down that road before....
Or should I stick to the original?
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