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Old 15th April 2019, 20:02   #1
chris75
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Default Any ideas :oil on an injector ?

I'm stripping down the kv6 engine at the moment to replace valve stem oil seals , and have come across something perhaps odd
After removing the injectors I noticed that the bottom of the injector on cylinder no 5 ( rear end of LH bank ) is wet with oil , as is its seating in the manifold . Photo shows it as best as I can.
The other injectors are quite dry . . Could this be related to my blue smoke on startup problem ? I would add that the exterior of the injector is quite clean and the oil is only down by the bottom O-ring . I may see more when I get the manifold off . I have new O-rings ready to go back on .
Any ideas please ………..
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Last edited by chris75; 15th April 2019 at 20:54..
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Old 15th April 2019, 21:18   #2
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It seems only two directions for the oil to come from..

You say the top is clean which only leaves a leaking oil ring at the bottom.--


( Maybe. )--
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Old 15th April 2019, 21:47   #3
chris75
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As you say , only two directions ! Either it comes down from the petrol rail, which would affect the other injectors , or it is coming up from the manifold .
But how does that happen ?
Very puzzled …………………….
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Old 16th April 2019, 15:21   #4
chris75
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I've decided it could be a build up of "evaporated " petrol residue .Or it could be oil mist coming from the VIS chamber ; turns out the alloy manifolds are coated in an oil mist , but the airways in the head are spotless !
Anyway , nothing to be concerned about …..
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