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Build your own TCV, save 50%

How to go faster, stop quicker, and turn harder. Chips, exhaust, larger turbos, bigger/slotted/drilled rotors, high performance brake pads, manual boost controllers, performance shocks/struts/springs, airbox mods and more! Also discussion on HID and Xenon lights, aftermarket foglights and other exterior lighting.
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matthew1
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Volvo Repair Database Build your own TCV, save 50%

Post by matthew1 » Thu Apr 24, 2014 2:41 pm

All hail Brett Borders for this info!

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Everything

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MAC Boost Control Solenoid Valve BCS MAC 35A-AAA-DDBA-1BA
$25.95 New in eBay Motors, Parts & Accessories, Car & Truck Parts
http://www.ebay.com/itm/261433744015?ss ... 1439.l2649

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10 Pieces, 1/4" Hose Barb x 1/8 NPT Brass Fittings
http://www.ebay.com/itm/131056710293?ss ... 439.l2649w
$11.00 New in Business & Industrial, Construction, Building Materials & Supplies


VOLVO PARTS - TERMINALS 978299 X 2 $4
BOOT INSULATOR 967340 $3
PLUG 979153 $4

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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

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epukerob
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Re: Build your own TCV, save 50%

Post by epukerob » Thu Apr 24, 2014 9:17 pm

Where do you get that nifty blue (silicone ?) rubber hose??

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matthew1
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Year and Model: 850 T5, 1997
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Re: Build your own TCV, save 50%

Post by matthew1 » Thu Apr 24, 2014 9:38 pm

Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

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configsys
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Re: Build your own TCV, save 50%

Post by configsys » Fri May 16, 2014 9:33 am

I'm sold. This is awesome. Thanks!
'17 S60
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Acknar
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Re: Build your own TCV, save 50%

Post by Acknar » Sun May 25, 2014 5:16 pm

Finally got one of my own build up. Got the connector from a older 240 o2 sensor found up on the firewall on the pass side. Hope to get it installed tomorrow. Crimped the connections and used hot melt heat shrink to make it waterproof.
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cjep
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Re: Build your own TCV, save 50%

Post by cjep » Sun Jun 08, 2014 2:26 am

In case anyone is wondering, the hose routing of this model is exactly the opposite of the IPD HD TCV. It should be connected:
Port 2 - compressor
Port 1 - wastegate
Port 3 - fresh air (or block it off like I did)

You will kill your engine if you get them mixed up, so to be safe blow through the sides ports - the side you can blow through should be connected to the compressor, the other side to the wastegate. Basically, without power, the TCV should supply the compressor pressure to the wastegate.

Good luck!
1998 C70 HPT - Saffran - Auto - 150,000 km
If you are in Brisbane, Australia, PM me. I would love to meet other volvo enthusiasts!

rx7850
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Re: Build your own TCV, save 50%

Post by rx7850 » Sun Jun 15, 2014 3:43 pm

Thanks for taking the time to do this great DIY.

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Re: Build your own TCV, save 50%

Post by db130 » Sun Apr 12, 2015 6:50 pm

Are you sure about that? I used the same MAC solenoid back in 2010 for a 98 S70 T5 and I used:

Port 1 - fresh air
Port 2 - wastegate
Port 3 - compressor

Here's a Volvospeed thread where a guy used the same solenoid on his 2007 V70r

He appears to be using Port 1 as fresh air(evidenced by the blue dot on the hose)

Here's another URL using the mac solenoid for an internal wastegate turbo
cjep wrote:In case anyone is wondering, the hose routing of this model is exactly the opposite of the IPD HD TCV. It should be connected:
Port 2 - compressor
Port 1 - wastegate
Port 3 - fresh air (or block it off like I did)

You will kill your engine if you get them mixed up, so to be safe blow through the sides ports - the side you can blow through should be connected to the compressor, the other side to the wastegate. Basically, without power, the TCV should supply the compressor pressure to the wastegate.

Good luck!
2002 V70 T5 169k
2002 V70 NA 249k
2006 Mini Cooper S 90k

precopster
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Re: Build your own TCV, save 50%

Post by precopster » Wed Nov 01, 2017 2:32 am

My 2001 T5 with 231,000kms (new plugs) has a hesitation/go hesitation/go attitude at light throttle/steady speeds. It feels like a headwind at times.
On full throttle it seems to go like the clappers. No codes of course!!

Feels like boost/no boost but hard to tell. Is this where a failing/old TCV will begin to show these signs?
Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

precopster
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Re: Build your own TCV, save 50%

Post by precopster » Fri Nov 10, 2017 3:44 pm

Ended up being a failed O2 sensor. Keeping up with a 17 yr old car's maintenance can be challenging......

In the meantime I just received my MAC valve.
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PHOTO_20171111_094023-1843x1382.jpg
Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

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