850 starts burning lots of oil from nowhere?

SomeGuy537 · Post by **SomeGuy537** » 27 Dec 2020, 14:11

scot850 wrote: ↑27 Dec 2020, 13:33 i had an oil level issue with a Volvo V70Xc (98) I had bought a few years ago. Those who have owned these cars for a while know that some of the dipsticks have a habit of the pull breaking of or snapping. I never seemed to be able to get the oil level right. I tried measuring the oil in and back out of the engine both with and without changing the oil filter but it was never at the right level.

What I eventually found was that someone had swapped the dipstick but not changed the dip-stick tube to match it. There are 2 different lengths of dip-stick tube that I am aware of, and also 2 types of dip-stick. Those with single and those with double 'o' ring seals on the top of the dip-stick.

Once I got the correct combination then the oil level then read correctly. Best thing is to do a full oil change with filter. Measure the oil put back in to the engine to the correct amount including a new filter.

Run the engine for a short time to get the oil circulated and the filter filled. Let the engine sit overnight and check the level in the morning.

If the level is not correct then the dip-stick/tube combo may be wrong. You can then at least make new marks on the dip-stick if replacing the parts are not available or affordable.

Last thing. For the double 'O' ring dip-stick, the 'O' ring is no longer listed or available. However the same part is used in the P2 engines and was still listed the last I had to buy them.

Neil.

The level was good previously and i checked it frequently and there were never any mysteries until i changed the oil, after that i lost some according to the dipstick and then i lost a lot. The level is back at almost max now that i poured a bottle of Stop leak into the engine. I don't think the dipstick is wrong or anything like that. I checked how much oil was in the engine when i did the oil change and there was around 5 liters i think. I put in a 5 litre jug of oil and the level shown by the dipstick was max. The oil capacity of the engine should be 5.3 liters so i think this is about all right.

Post by **manovlov** » 28 Dec 2020, 02:50

SomeGuy537 wrote: ↑27 Dec 2020, 11:13 There's oil under the spark plug cover i might add.

Known issue with 850. It can be solved by changinging the cap seal.

Manov

SomeGuy537 · Post by **SomeGuy537** » 28 Dec 2020, 03:05

manovlov wrote: ↑28 Dec 2020, 02:50
SomeGuy537 wrote: ↑27 Dec 2020, 11:13 There's oil under the spark plug cover i might add.
Known issue with 850. It can be solved by changinging the cap seal.

Manov
Seal oil filler cap.png

Seems like a cheap and simple fix, i will definitely give it a go!

befarrer · Post by **befarrer** » 29 Dec 2020, 06:16

I added an oil catch can to my PCV a few months back, it froze, making my PCV flow nothing, I noticed this by the large plume of blue smoke behind me when I accelerated. Disconnected my catch can and reconnected it as it was from factory, smoke went away, so it can make a huge difference. My PCV is a year old.

SomeGuy537 · Post by **SomeGuy537** » 29 Dec 2020, 12:23

befarrer wrote: ↑29 Dec 2020, 06:16 I added an oil catch can to my PCV a few months back, it froze, making my PCV flow nothing, I noticed this by the large plume of blue smoke behind me when I accelerated. Disconnected my catch can and reconnected it as it was from factory, smoke went away, so it can make a huge difference. My PCV is a year old.

Interesting. I have been a little worried that my PCV is still somehow bad even after i did the job. But i'm suspecting that maybe the glove test fails because of excessive blow by rather than a bad PCV. The weird thing is that the huge oil consumption started out of nowhere and i had no consumption before the PCV job either. No smoke to speak of either.

Post by **volvolugnut** » 29 Dec 2020, 12:38

Just checking - when you did the PCV job, did you blow through the drain hole down to the oil pan? If that is plugged with gunk, the oil has no way to drain.
volvolugnut

SomeGuy537 · Post by **SomeGuy537** » 30 Dec 2020, 04:04

volvolugnut wrote: ↑29 Dec 2020, 12:38 Just checking - when you did the PCV job, did you blow through the drain hole down to the oil pan? If that is plugged with gunk, the oil has no way to drain.
volvolugnut

No, i didn't know that you had to do that.

Post by **volvolugnut** » 30 Dec 2020, 12:59

SomeGuy537 wrote: ↑30 Dec 2020, 04:04
volvolugnut wrote: ↑29 Dec 2020, 12:38 Just checking - when you did the PCV job, did you blow through the drain hole down to the oil pan? If that is plugged with gunk, the oil has no way to drain.
volvolugnut
No, i didn't know that you had to do that.

It was another helpful tips from MVS. The drain is on the back side of the PCV tank into the engine block.

volvolugnut

SomeGuy537 · Post by **SomeGuy537** » 30 Dec 2020, 17:50

volvolugnut wrote: ↑30 Dec 2020, 12:59
SomeGuy537 wrote: ↑30 Dec 2020, 04:04
volvolugnut wrote: ↑29 Dec 2020, 12:38 Just checking - when you did the PCV job, did you blow through the drain hole down to the oil pan? If that is plugged with gunk, the oil has no way to drain.
volvolugnut
No, i didn't know that you had to do that.
It was another helpful tips from MVS. The drain is on the back side of the PCV tank into the engine block.

volvolugnut

Didn't know you meant the ports in the block. Those are good.

Post by **volvolugnut** » 30 Dec 2020, 18:00

SomeGuy537 wrote: ↑30 Dec 2020, 17:50
volvolugnut wrote: ↑30 Dec 2020, 12:59
SomeGuy537 wrote: ↑30 Dec 2020, 04:04

No, i didn't know that you had to do that.
It was another helpful tips from MVS. The drain is on the back side of the PCV tank into the engine block.

volvolugnut
Didn't know you meant the ports in the block. Those are good.

Great. Sorry I was not clear.
volvolugnut

850 starts burning lots of oil from nowhere?

Re: 850 starts burning lots of oil from nowhere?