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Failed compression test and misfire

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Old Apr 10th, 2023, 11:46   #21
amorlv70
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And here is the valve cover underside, darkest at cyl5, and a badly taken photo of the gasket.

IMG_20230404_083848.jpg

IMG_20230404_000653.jpg
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Old Apr 10th, 2023, 11:49   #22
amorlv70
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Quote:
Originally Posted by dikidera View Post
I've heard...and this is only something I've heard from mechanics. Is that the black deposits are not problematic. Whether this is because it's true or they don't know, that's a different story.

Point being, it may not be such an issue. Let them measure the clearances between the lobes and lifters, if they are within spec I would imagine there should be no issue.
Thanks.
I will report back when I have heard from the engine shop, most likely midweek..
I know that dark deposits can happen when oil gets a bit old, but this car has had oil changes every 6-8k miles since it was brand new and they are only present on the cylinders that had bad compression leading me to believe that this has been caused by an issue..
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Old Apr 11th, 2023, 12:49   #23
abdiel
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Hi amorly70, the recommended NGK Plugs for your V70 are BKR6ETUC.
https://www.ebay.co.uk/itm/323961805277 is a reasonable price.

Alternative is BKR6EKUB.https://www.ebay.co.uk/itm/234908016646 and very reasonable as it is a 6 pack!
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Old Apr 15th, 2023, 19:26   #24
dikidera
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Quote:
Originally Posted by amorlv70 View Post
Thanks.
I will report back when I have heard from the engine shop, most likely midweek..
I know that dark deposits can happen when oil gets a bit old, but this car has had oil changes every 6-8k miles since it was brand new and they are only present on the cylinders that had bad compression leading me to believe that this has been caused by an issue..
You call that black? To me it looks very very ok. Tomorrow or the next day I will show you my valve cover.

Last edited by dikidera; Apr 15th, 2023 at 19:29.
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Old Apr 16th, 2023, 17:36   #25
amorlv70
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You call that black? To me it looks very very ok. Tomorrow or the next day I will show you my valve cover.
For a car that has been serviced so regularly it seems a little dark, I wouldn't be concerned if it was uniform across all of the cylinders but it is not..
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Old Apr 17th, 2023, 20:43   #26
dikidera
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Here it is.
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File Type: jpg 20230417_224111.jpg (281.7 KB, 10 views)
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Old Apr 26th, 2023, 11:22   #27
amorlv70
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Here it is.
That does look quite dark.
I wouldn't have been confused if it had been the same colour across the whole cover but it was not
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Old Apr 26th, 2023, 15:29   #28
classicswede
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NGK BKR6ES are the plugs to use
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