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  #1  
Old 08-13-2019, 03:19 PM
wayne3546 wayne3546 is offline
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Injector Shims?

I've been having injector failures. I replaced #5, then #1 failed, and now #4 is giving me grief. I decided to pull the remaining injectors and have them tested. When I did, on three, I found a silver shim in addition to the copper gasket. Any one encountered this?

I see a note in the NewTIS about shims in some heads of models manufactured between 2/1/2012 and 5/10/2012. There is no mention about if all the injectors were to have shims or just the ones that needed them.

I'm assuming there was a cylinder head problem that was corrected using these shims. I says, if the shim is lost the cylinder head must be replaced.

So to repeat the question.. Does any one know if the shims are supposed to be on all these injectors or just the three I found?
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  #2  
Old 08-13-2019, 03:29 PM
Doug Huffman's Avatar
Doug Huffman Doug Huffman is offline
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NewTIS addresses the shims per injector (singular) in those model years. It is correct that not all of those years injectors had shims.

I believe that if the shim is lost a very experiencde machinist might be able to recover the need or not and the dimension if required.

Quote:
Originally Posted by NewTIS
If the copper sealing ring (1) and also a shim (2) are removed during removal of the injector: It is paramount to reinstall the shim in the cylinder head.
https://www.newtis.info/tisv2/a/en/e...nes/1VnYtigy7s
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Last edited by Doug Huffman; 08-13-2019 at 03:32 PM.
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Old 08-13-2019, 05:31 PM
wayne3546 wayne3546 is offline
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Thanks Doug. I was thinking along those lines and was going to replace them as found. I may even measure the depths and see the difference.
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  #4  
Old 08-14-2019, 01:47 PM
wayne3546 wayne3546 is offline
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UPDATE: I measured the depth of each injector socket. The 3 with the shims are deeper by the thickness of the shims installed.

Another note: I had the 4 remaining injectors tested. One failed. I expected it to be #4 as that is the one the DDE was disabling, but it was #3 that didn't pass the test. It was flowing too much fuel to the return.
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Old 08-14-2019, 02:09 PM
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Doug Huffman Doug Huffman is offline
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Quote:
Originally Posted by wayne3546 View Post
UPDATE: I measured the depth of each injector socket. The 3 with the shims are deeper by the thickness of the shims installed.
Deeper measured from deck height. Is that the appropriate shimming, and not from some internal datum? Specifically, the 14.5 mm datum and the unidentified lead line just above it, that appears schematically of the same magnitude as the 1.85 mm datum at the shim.

Requiring head replacement for a lost shim, as NewTIS dictates, seems an extreme requirement for so straightforward a solution.

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__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.

Last edited by Doug Huffman; 08-14-2019 at 02:19 PM.
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  #6  
Old 08-15-2019, 05:03 PM
wayne3546 wayne3546 is offline
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I agree that it is an extreme solution for such a straight forward solution. Having a shim made would be quicker, easier and cheaper.
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  #7  
Old 08-15-2019, 05:19 PM
Doug Huffman's Avatar
Doug Huffman Doug Huffman is offline
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Maybe. I have made shims at a couple of microns, lapped like a lens. We don't know what the requirements are for this shim.
__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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  #8  
Old 08-15-2019, 05:37 PM
wayne3546 wayne3546 is offline
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These shims are lapped like lenses. I'm not sure of the material used, though. Fortunately I haven't lost one.
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2004 X5 3.0 (deceased - killed at an intersection after 2 weeks ownership)
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