Failed compression test and misfire - Page 3

amorlv70 · Apr 10th, 2023, 11:46

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

amorlv70 · Apr 10th, 2023, 11:49

Quote:

Originally Posted by dikidera

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..

abdiel · Apr 11th, 2023, 12:49

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!

dikidera · Apr 15th, 2023, 19:26

Quote:

Originally Posted by amorlv70

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.

amorlv70 · Apr 16th, 2023, 17:36

Quote:

Originally Posted by dikidera

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..

dikidera · Apr 17th, 2023, 20:43

Here it is.

amorlv70 · Apr 26th, 2023, 11:22

Quote:

Originally Posted by dikidera

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

classicswede · Apr 26th, 2023, 15:29

NGK BKR6ES are the plugs to use

Apr 26th, 2023, 15:29	#28
classicswede Trader Volvo in my veins Last Online: Yesterday 23:53 Join Date: Dec 2004 Location: Anglesey	NGK BKR6ES are the plugs to use __________________ http://www.classicswede.org www.classicswede.co.uk

Apr 10th, 2023, 11:46	#21
amorlv70 Junior Member Last Online: Mar 22nd, 2024 23:10 Join Date: May 2020 Location: Newcastle View Photos By: amorlv70	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

Apr 11th, 2023, 12:49	#23
abdiel VOC Member Last Online: Apr 22nd, 2024 23:23 Join Date: Aug 2014 Location: Further North than the Back of Beyond	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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