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2004 XC90 T6 UP28 brake vacuum pump clicking

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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wheelman55
Posts: 2
Joined: 13 January 2018
Year and Model: 2004 XC90, 2010 XC70
Location: Minneapolis, MN USA

2004 XC90 T6 UP28 brake vacuum pump clicking

Post by wheelman55 »

On my 2004 XC90 T6.

The brake vacuum pump, UP28, was clicking upon cold start this morning.
  • it was cold. Negative 5 farenheit.
    • The pump would rapidly click for a second, repeating every ten seconds.
      • the noise went away when the engine warmed up
    Is this a pump going bad or something else, like the switch?

    Thanks for the help.
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FLXC90
Posts: 1132
Joined: 18 August 2014
Year and Model: 98 V70 T5
Location: Florida Panhandle
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Post by FLXC90 »

Had this on mine a couple "winters" ago. As I recall, it was related to the turbo vacuum/boost plumbing. I think I replaced a hose connector. But I am old and forgetful. :oops: Best of luck, let us know.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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wheelman55
Posts: 2
Joined: 13 January 2018
Year and Model: 2004 XC90, 2010 XC70
Location: Minneapolis, MN USA

Post by wheelman55 »

FLXC90...I can "feel" the clicking when I touch the pump. Did you have this symptom on yours?
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xyourobob
Posts: 59
Joined: 7 October 2016
Year and Model: 2004 XC90, 2011 XC60
Location: Maryland, USA
Been thanked: 4 times

Post by xyourobob »

It sounds to me like that clicking is your pump trying to come on when it should which is when you first start the car, can you hear the pump whirring? The pump is designed to only come on a few times when the car is cold then does not run again. Sounds like the pump is shot.
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June
Posts: 2275
Joined: 4 May 2016
Year and Model: 2004 S80 T6,1991 740
Location: Arkansas
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Post by June »

Though my T6 is a 2004 S80 it also has the vacuum pump too. Years ago I noticed a plastic sensor with wires going to it had popped off a vacuum line that is about the diameter of the vacuum line going to the power break booster but down below the air cleaner.

I took it straight to Volvo and was told it was common for them to pop off due to the high under hood temperature of the T6. Once it has come off it must be replaced or shortly damage to the pump would result so I was told. I'll take a picture tomorrow of the sensor. I noticed it quickly so my pump is still running strong years later. June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned
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June
Posts: 2275
Joined: 4 May 2016
Year and Model: 2004 S80 T6,1991 740
Location: Arkansas
Has thanked: 523 times
Been thanked: 261 times

Post by June »

June wrote: ↑23 Jan 2018, 20:22 Though my T6 is a 2004 S80 it also has the vacuum pump too. Years ago I noticed a plastic sensor with wires going to it had popped off a vacuum line that is about the diameter of the vacuum line going to the power break booster but down below the air cleaner.

I took it straight to Volvo and was told it was common for them to pop off due to the high under hood temperature of the T6. Once it has come off it must be replaced or shortly damage to the pump would result so I was told. I'll take a picture tomorrow of the sensor. I noticed it quickly so my pump is still running strong years later. June
Okay here is the part replaced.
Attachments
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My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned
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FLXC90
Posts: 1132
Joined: 18 August 2014
Year and Model: 98 V70 T5
Location: Florida Panhandle
Has thanked: 16 times
Been thanked: 45 times

Post by FLXC90 »

Hey, that's the one I had to change, the whole top of the can pops off.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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User avatar
FLXC90
Posts: 1132
Joined: 18 August 2014
Year and Model: 98 V70 T5
Location: Florida Panhandle
Has thanked: 16 times
Been thanked: 45 times

Post by FLXC90 »

Or to be safe, go to Volvo's website under the owner tab to access your owner's manual.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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