Engine 850: B5204S/2.0/20v: - Crankcase breather schematic non-turbo

motco · Aug 5th, 2009, 18:18

I have the task of changing my daughter's 850 estate crankcase breather system and I have found the excellent step-by-step guide to the job for the turbo model, but this one is n/a and the pipework is different. Two pipes have become disconnected and it would be wonderful if anyone has a diagram of the non-turbo PCV pipework layout please.

JonYorks · Aug 5th, 2009, 18:46

Think it might be same as a 1997 S70 non-turbo?? Correct oil trap for mine was the 850 item.
Some models seem to have 2 pipes coming out of the top whereas mine only had one.
I've read before that if it has 2 pipes coming out of top then they need fitting a certain way, also read that it doesn't matter on n/a models, unsure which is correct.
Few photos I did take might help you.

T240 · Aug 5th, 2009, 20:34

Hi,

From you pictures below, I take it the inlet manifold has to come off as the oil trap is buried beneath?

Cheers,

T

Quote:

Originally Posted by JonYorks

Think it might be same as a 1997 S70 non-turbo?? Correct oil trap for mine was the 850 item.
Some models seem to have 2 pipes coming out of the top whereas mine only had one.
I've read before that if it has 2 pipes coming out of top then they need fitting a certain way, also read that it doesn't matter on n/a models, unsure which is correct.
Few photos I did take might help you.

JonYorks · Aug 5th, 2009, 21:09

Hi yes its well buried under the inlet manifold.
You might only need to loosen the lower manifold bolts if its slotted to lift off. On mine theres a couple of hidden bolts fixed under the manifold, one on oil dipstick tube and one on a support brace which is totally hidden. 12mm heads I think.

T240 · Aug 5th, 2009, 21:46

Quote:

Originally Posted by JonYorks

Hi yes its well buried under the inlet manifold.
You might only need to loosen the lower manifold bolts if its slotted to lift off. On mine theres a couple of hidden bolts fixed under the manifold, one on oil dipstick tube and one on a support brace which is totally hidden. 12mm heads I think.

Thanks very much for the info. If only the manuals were as helpful!

Frankly it sounds like a SOAB, and what with the ongoing problems that have arisen with our 'mint' 2.5 20v, I think I'm close to sending it to the local auctions and starting over!

Cheers,

T

JonYorks · Aug 6th, 2009, 00:43

Mines a 10v but think it will be pretty much same as yours.
Its not that hard of a job really, more fiddly than anything especially the manifold bolts.
I only needed to buy new oil trap (£14 from volvo) and manifold gasket (£11) because after cleaning out the pipework it was all ok and unsplit etc. I was going to remove the flame trap (like volvo suggest) seen as it causes problems but someone has already removed it.

One thing I try to remember is that the engine block is alloy and very easy to strip threads. I've gotten used to working on cast iron engines up til now.

motco · Aug 6th, 2009, 08:36

JonYorks, Many thanks for the pictures. It is a bit different as the picture below will show - if I succeed in uploading it that is. The pic is not mine/my daughter's and it is a turbo but the pipe hard against the oil filler is a duplex pipe and one is a hard small diameter pipe like a vacuum tube. It goes somewhere, clearly, but it's come off and I am not sure where it goes. Theres another like it under the manifold and I think that comes from the black plastic device in your first picture - the one with three spigots on one side and two on the other. The upper spigot on the two spigot side has a broken stub of rubber on that seems to accord with the broken stub on the end of the loose pipe from under the manifold - not the duplex pipe from the cam chamber, but the other unknown pipe. You see my difficulty...

JonYorks · Aug 6th, 2009, 11:52

Is the small diameter pipe connected at the left side of inlet manifold? (Can see it loose in my 4th photo)
If I remember correctly then the pipe coming from the top spigot you mentioned goes to there.
Its quite hidden but if you can look down the side of the manifold near the pipe that comes from the header tank you should see the pipe.

motco · Aug 6th, 2009, 13:01

That looks about right Jon, it is long enough to reach without straining, but the other loose one would be too tight so I suspect you're right. A member on another forum I subscribe to (Westfield Sports Car Club) has come up with a diagram from the VADIS DVD and that should confirm what you say. I must say that this forum, and WSCC, are both very helpful. Some others I read or contribute to are far less helpful - thanks again for your assistance.

JonYorks · Aug 7th, 2009, 13:57

Just looked today and I remembered wrong, the top pipe on the multi spigot thing (in my first photo) actually goes to the fuel pressure regulator.

So the small pipe which comes from the end of the inlet manifold goes across to the flame trap which is the same place the pipe from the top of the oil trap goes to.

Aug 5th, 2009, 18:18	#1
motco New Member Last Online: Jul 8th, 2011 10:42 Join Date: Aug 2009 Location: Beaconsfield	Crankcase breather schematic non-turbo I have the task of changing my daughter's 850 estate crankcase breather system and I have found the excellent step-by-step guide to the job for the turbo model, but this one is n/a and the pipework is different. Two pipes have become disconnected and it would be wonderful if anyone has a diagram of the non-turbo PCV pipework layout please.

Aug 6th, 2009, 11:52	#8
JonYorks Member Last Online: Feb 14th, 2015 20:34 Join Date: Feb 2009 Location: Yorkshire	Is the small diameter pipe connected at the left side of inlet manifold? (Can see it loose in my 4th photo) If I remember correctly then the pipe coming from the top spigot you mentioned goes to there. Its quite hidden but if you can look down the side of the manifold near the pipe that comes from the header tank you should see the pipe. Last edited by JonYorks; Aug 6th, 2009 at 11:56.

Aug 5th, 2009, 18:46	#2
JonYorks Member Last Online: Feb 14th, 2015 20:34 Join Date: Feb 2009 Location: Yorkshire	Think it might be same as a 1997 S70 non-turbo?? Correct oil trap for mine was the 850 item. Some models seem to have 2 pipes coming out of the top whereas mine only had one. I've read before that if it has 2 pipes coming out of top then they need fitting a certain way, also read that it doesn't matter on n/a models, unsure which is correct. Few photos I did take might help you.

Aug 5th, 2009, 21:09	#4
JonYorks Member Last Online: Feb 14th, 2015 20:34 Join Date: Feb 2009 Location: Yorkshire	Hi yes its well buried under the inlet manifold. You might only need to loosen the lower manifold bolts if its slotted to lift off. On mine theres a couple of hidden bolts fixed under the manifold, one on oil dipstick tube and one on a support brace which is totally hidden. 12mm heads I think.

Aug 6th, 2009, 00:43	#6
JonYorks Member Last Online: Feb 14th, 2015 20:34 Join Date: Feb 2009 Location: Yorkshire	Mines a 10v but think it will be pretty much same as yours. Its not that hard of a job really, more fiddly than anything especially the manifold bolts. I only needed to buy new oil trap (£14 from volvo) and manifold gasket (£11) because after cleaning out the pipework it was all ok and unsplit etc. I was going to remove the flame trap (like volvo suggest) seen as it causes problems but someone has already removed it. One thing I try to remember is that the engine block is alloy and very easy to strip threads. I've gotten used to working on cast iron engines up til now.

Aug 6th, 2009, 08:36	#7
motco New Member Last Online: Jul 8th, 2011 10:42 Join Date: Aug 2009 Location: Beaconsfield	JonYorks, Many thanks for the pictures. It is a bit different as the picture below will show - if I succeed in uploading it that is. The pic is not mine/my daughter's and it is a turbo but the pipe hard against the oil filler is a duplex pipe and one is a hard small diameter pipe like a vacuum tube. It goes somewhere, clearly, but it's come off and I am not sure where it goes. Theres another like it under the manifold and I think that comes from the black plastic device in your first picture - the one with three spigots on one side and two on the other. The upper spigot on the two spigot side has a broken stub of rubber on that seems to accord with the broken stub on the end of the loose pipe from under the manifold - not the duplex pipe from the cam chamber, but the other unknown pipe. You see my difficulty...

Aug 6th, 2009, 13:01	#9
motco New Member Last Online: Jul 8th, 2011 10:42 Join Date: Aug 2009 Location: Beaconsfield	That looks about right Jon, it is long enough to reach without straining, but the other loose one would be too tight so I suspect you're right. A member on another forum I subscribe to (Westfield Sports Car Club) has come up with a diagram from the VADIS DVD and that should confirm what you say. I must say that this forum, and WSCC, are both very helpful. Some others I read or contribute to are far less helpful - thanks again for your assistance.

Aug 7th, 2009, 13:57	#10
JonYorks Member Last Online: Feb 14th, 2015 20:34 Join Date: Feb 2009 Location: Yorkshire	Just looked today and I remembered wrong, the top pipe on the multi spigot thing (in my first photo) actually goes to the fuel pressure regulator. So the small pipe which comes from the end of the inlet manifold goes across to the flame trap which is the same place the pipe from the top of the oil trap goes to.

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