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FINALLY, a Vacuum Hose Diagram

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

FINALLY, a Vacuum Hose Diagram

Postby MadeInJapan » 08 Apr 2006, 17:40

This is for a '98 T-5. Others will vary but the same or similar to most 850 turbo's. The designed changed with later S/V/70's so be aware. I got so darned frustrated trying to see this intsy bittsy diagram under the hood of the car, so I finally took a decent digital picture today. I hope it helps others. Just copy it and keep it on your computer. It should be a good reference.


Image

Image
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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Postby 95autoturbo » 09 Apr 2006, 04:02

yes......It is an 850!
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Postby MadeInJapan » 09 Apr 2006, 04:35

We can post that diagram too! Image
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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Postby Ghassan » 12 Apr 2006, 16:55

hi,

Can someone point out what the mini air filter is for. There is a large one on the left side of the screen (I believe for air intake) and there a small one on the bottom right side of the picture. What is the small one for?

thanks.
ghassan.
98 S70 T5 Auto

03 540i 6sp
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Postby MadeInJapan » 12 Apr 2006, 23:45

Good question...I was wondering the same thing. If you really want to know, follow the line (actually hard to get to...runs under battery) from the purge valve and see where it goes...actually might go to the same air filter???
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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vacuum leak

Postby STORMY » 12 Aug 2006, 00:57

can a hole in the vacuum hose cause the air to blow out the side vents and not the middle ones?
CARRIE 780 BERTONE TURBO

NEED HELP PLEASE!!
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Postby MadeInJapan » 12 Aug 2006, 02:13

Are you talking about Air Conditioner in the cabin? If so, then no, this has nothing to do with that. Instead, you may have small motors in your vent system itself that opens and closes the flaps, and they may be broken, or dirty and not able to move properly. There are probably other reasons too...not familiar with your car either....sorry.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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Postby Volvo_240_Atari_2600 » 08 Oct 2007, 03:27

Just came across this older thread.

I finally bought the 98 v70 Non-Turbo wagon I had mentioned in an earlier thread. The car id nice and I was able to talk her down and we settled for $2,500.00 based on the need of a timing belt (complete) and possible CV Joint or Spring Seat on passenger side, not to mention it was low on 3 qts of oil, but no aparent leak from the rear main seal... The leak was from the oil filler cap that was not sealing well... My 240 did that and the trich was a $10.00 cap.

Anyway...

I washed the engine compartment today since it was filthy... Oil leaked over time from above (oil filler cap) and in the bath... the high pressure of water took out one vacum hose and I have no clue as to where it connects.

I will see if I can get a pic tomorrow to show you guys to help me ID where it goes.

Description of where I am sure it comes from:

Just at the back of the air filter box and facing the driver are two vacum pegas that come from the filter box... The lower vacum line is still conected and the rubber elbow looks OK but could be replaced... It's the one on the top...

The top elbow was brittle and could not take the pressure of the water and gave way... Now I have a line of about 10-12" long and I cannot find where it would have conected to.

Can someone tell me where that line goes on the 98 v70 non turbo?
NA car if that helps.

Doing the T Belt etc... next Saturday and today the car now runs like crap after the wash. I did get water in the distributor cap so I had to open it and dry it out to start...

Car started but the guy at AutoZone said the scanner read a fault code of "Misfiring" which was taken before the engine wash and before that it ran smooth even with the CEL light on which I thought could have been the 02 sensor.

But now, it runs like it is misfiring and from the looks inside the distributor cap, I am almost convinced that a change of plugs, rotor, cap and wires should resolve that issue.

Any thoughts?

Could that vacume line be an added culprit since the reading before the wash was MISFIRE but it ran smooth before the wash.

Thanks
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Postby chuckcintron » 08 Oct 2007, 12:27

Be sure to do the PCV rebuild. Many of your oil leak issues will be solved by that repair.

Man, you are brave taking a high pressure wand to your engine :(

Also, thread hijacking like this makes it tough for folks who may search the forum in the future to find information learned in this thread. Might have been better to start a new thread...

-Chuck
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Re: FINALLY, a Vacuum Hose Diagram

Postby kenborn » 15 Aug 2009, 16:09

Can you provide the picture of the vaccum hose please
I have a 98 s70 T5 changed the engine and don't remember where the hoses connect to.
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Re: FINALLY, a Vacuum Hose Diagram

Postby matthew1 » 15 Aug 2009, 17:45

Imageshack -- who was hosting the diagram -- appears to have deleted it from their server(!).

I found it somewhere, and am now hosting it here for safekeeping.

Image
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1997 850 T5, MBC, tune, strut brace, dying paint
2004 V70 R [gone]
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Re: FINALLY, a Vacuum Hose Diagram

Postby rcannon » 21 Nov 2009, 00:16

Hello - thanks for the diagram. I'm new here. Great forum. I have a new 97 850 turbo wagon, and am having some problems with overboost and cutting out. I can't figure out where the red line that comes out of the TCV should go. Currently it's tee'd into a line that hooks onto the beginning of the air inlet tube just after the air filter, and the other end goes to the end of the air inlet tube where there is a larger hose also coming into it. This doesn't make sense to me- the wastegate needs a line going to boost pressure. But I can't find a pressure tap according to the diagram on the turbo, unless the large 3/8" or so braided hose going into the turbo inlet line comes from the inlet manifold and there's an orifice in there or something.

Also the center blue line was going to a metal tube about 1/8" dia going down the back of the engine along a larger metal tube, and the hose appears about 1/4" so that can't be right. It says it goes to fresh air hose, or I suppose that's the air inlet also.

Thanks in advance.
Bob
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Re: FINALLY, a Vacuum Hose Diagram

Postby rcannon » 21 Nov 2009, 00:36

Found a better picture elsewhere and mine is way off as suspected. But I still don't know what goes on the hard 1/8 tube that starts near the TCV but lower, and is rigid mounted, and goes across and down the back of the engine lower somewhere out of view. Maybe to the transmission? If so what should be hooked to it?
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Re: FINALLY, a Vacuum Hose Diagram

Postby kcodyjr » 01 Mar 2010, 07:02

Have that better picture? I'm finding that one hard to follow.
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RIP 1981 242 turbo 5spd, 300K, serious teenage crash
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