TCV Hose Replacement - Routing

moncureww · Post by **moncureww** » 10 Nov 2020, 15:57

Is there an exploded diagram of the TCV hose layout for a 2006 s60 2.5T, and where everything connects? I am replacing my TCV this weekend, and plan on replacing the TCV hoses at the same time - I have this kit from IPD:

It came with little clips as well - I just want to know where everything connects, visibly, under the hood of the car before digging into it Saturday morning.

Post by **abscate** » 11 Nov 2020, 04:59

Take the time to understand function , not just “ hose by number”

The TCV is a two way valve which routes pressure to either the wastegate ( yellow) actuator to turn on boost or it routes it to the intake snorkel ( blue) to dump it if boost isn’t required.

The pressure comes from the turbo compressor housing ( red)

The OEM tcv have dots of the right colour to help guide what goes on what , too. See if those are visible before you start

There should be a sticker under the hood documenting this but the blue hose is notoriously poorly labeled on these onearlier models. It goes down to the snorkel low near the turbo intake

moncureww · Post by **moncureww** » 11 Nov 2020, 17:28

Thanks. I've been reading how this turbo system functions, and looking to make sure the turbo, intake, and vacuum system is in tip-top shape before I upgrade the downpipe and exhaust this spring. I'm getting an ipd tune next year after I get everything to stage 0 and drive it a few thousand more miles.

Post by **BlackBart** » 11 Nov 2020, 19:50

When I did this (with the same ipd hose kit), I removed the air filter box and intake plumbing, and the big filter-box-to-turbo pipe. Enough things out of the way so you can get your head and a light back there. I carefully replaced one at a time, using the same routing through any brackets and clips. Cut to fit with enough slack to work with. The existing squeeze clamps were a bit too big for the new silicon hose, so use the new ones. I had some in my stash that were even tighter. I like a very long reach needle nose or square jaw pliers on those.

moncureww · Post by **moncureww** » 12 Nov 2020, 11:38

Thank

BlackBart wrote: ↑11 Nov 2020, 19:50 When I did this (with the same ipd hose kit), I removed the air filter box and intake plumbing, and the big filter-box-to-turbo pipe. Enough things out of the way so you can get your head and a light back there. I carefully replaced one at a time, using the same routing through any brackets and clips. Cut to fit with enough slack to work with. The existing squeeze clamps were a bit too big for the new silicon hose, so use the new ones. I had some in my stash that were even tighter. I like a very long reach needle nose or square jaw pliers on those.

Thanks for the explanation - I think I'll do the same. I went ahead and got a new boost pressure sensor at the same time - when i get my tune and exhaust this spring I want to make sure everything is in tip-top shape on the intake side well in advance, and take it weekend by weekend. I'll be removing and replacing all the plumbing I can to make things accessible. Do you think it would be worthwhile to replace all the rubber hose I can with silicone while I'm doing all this? Is there anything else worth handling preventatively while I'm in there? I've already replaced the PCV system and done a complete tune up on the engine, and replaced the OTE turbo couplers with IPD silicone...