Where does this hose connect? B21ft

[JoeLouis]

Hose is coming from the intake piping to the turbo. I'm going to replace it(has a cut), but I don't know what it connects to?

 

[hiperfauto]

It goes to an elbow fitting on the pcv box under the manifold.

 

[dl242gt]

Look between cylinder 3 and 4 on the intake manifold. Right next to the block under the manifold.

 

[JoeLouis]

Look between cylinder 3 and 4 on the intake manifold. Right next to the block under the manifold.

Thanks y'all, took me a minute to get back at it.

I took off the hoses I had connected under the intake and I only see this guy coming out of the pcv box and it is not the same size.

Am I looking in the correct place?

 

[Mr. V]

Odd that it isn't the same size: it sure looks like the hose that should fit on that nipple.

 

[hiperfauto]

Originally there would have been a short piece of straight hose (#14) and a plastic elbow fitting (#15)' with a small nipple that was capped on the breather box fitting in your pic (the cap is used instead of hose #19). It has since been updated to the 2 size hose (#16) and large plastic fitting (#18) that's set up for a flame trap (#17). Turbos don't use a flame trap.


iPD sells aftermarket and OE flame trap kits but you don't use the flame trap.

Flame Trap Kit - NON Turbo 81-87 - Aftermarket - Volvo 1336681 1336682 1389657

>104287 1336681 1336682 1389657 81 87 Aftermarket Flame Kit Non Trap Turbo Volvo

www.ipdusa.com

Flame Trap Kit - NON Turbo 81-87 - Genuine Volvo - 1389657 1336682 1336681

>114236 1336681 1336682 1389657 81 87 Flame Genuine Kit Non Trap Turbo Volvo

www.ipdusa.com

You could also just buy the hose and nipple separately from the dealer since iPd doesn't sell them that way. The part numbers are 1336681 & 1336682.

 

[bobxyz]

Here's IPD's flametrap kit picture which is a little easier to understand.


Parts A,B,C are the kit. For Turbo installs, part B, the flametrap disk itself, is discarded and the small nipple is capped off instead of using hose H.

A few years ago, you could get the proper B21FT PCV breather hose G from IPD for $6 (thanks highperfauto), but it's no longer available from IPD - it must have been a closeout special, or NLA aftermarket. The B21FT hose is Volvo #1306931

 

[JoeLouis]

I see, thank you for the diagrams and explanations!

Well then, what does this hose go to? The one that comes out under the Throttle Position Sensor (yellowish dots) on the intake on the firewall side. I had it connected to the top of the pcv box....near the red circle

 

[JoeLouis]

And for the next question on "Please name that thingamajig and what connects to it!".....

This is near the fire wall extruding from the block beside the exhaust.

 

[hiperfauto]

I believe that hose is for the IAC.

The other thingamajig is the block drain. Nothing gets connected to it.

 

[bobxyz]

Can you post a zoomed out picture of your intake manifold and turbo hoses? I think you have a later EFI electronic fuel injection style intake manifold with the injector holes blocked off.

post a pic of your engine bay

And an older pic of the 245: And what it looks like now:

www.turbobricks.com

 

[hiperfauto]

If you look at the pic in his first post you can see that's its definitely an LH manifold with the injector holes plugged.

 

[JoeLouis]

Can you post a zoomed out picture of your intake manifold and turbo hoses? I think you have a later EFI electronic fuel injection style intake manifold with the injector holes blocked off.

post a pic of your engine bay

And an older pic of the 245: And what it looks like now:

www.turbobricks.com

Is this manifold not the original style for this model (84 242 Turbo)?

What it looked like when I got it.

post a pic of your engine bay

And an older pic of the 245: And what it looks like now:

turbobricks.com

This is what it looks like at the moment

 

[JoeLouis]

I believe that hose is for the IAC.

The other thingamajig is the block drain. Nothing gets connected to it.

A block drain a majig of course!

Thanks again! But if that hose is for the IAC then what is the hose I have connected to the IAC?.....I had it connected to the intake (Purple)

 

[Pietercc]

A block drain a majig of course!

Thanks again! But if that hose is for the IAC then what is the hose I have connected to the IAC?.....I had it connected to the intake (Purple)

View attachment 27513View attachment 27514

You may have extra hoses, that is not the right intake manifold, that is a electronic fuel injection manifold, so it has different ports.

 

[hiperfauto]

That sounds plausible. You have mix matched parts from different engines/injection types.

 

[JoeLouis]

If you look at the pic in his first post you can see that's definitely an LH manifold with the injector holes plugged.

I see that the LH jetronic fuel injection system had different versions throughout the years. This article IPD LH ID pointed to checking the Throttle Position Sensor and mine seems to be from a BMW...so I'm getting confuseder. What intake do I have?

 

[Pietercc]

Your car is going to have a very dirty stage 0. It seams like the previous owner did a lot to make things work. You definitely are running K-jet, but I have no clue what else has been done.

 

[bobxyz]

OK, it looks like you have a later style LH intake manifold that's been adapted to K-Jet. Maybe a PO did this when they added the intercooler? The original B21 Turbos didn't have an intercooler. To add it, you need a big metal right-angle adapter on the K-Jet throttle body - see my engine bay pics.

With the LH style intake manifold, one side of the IAC valve connects into the intercooler-to-throttle body pipe (before the butterfly valve), and the other side of the IAC goes to the intake plenum (after the butterfly valve). Your setup looks OK.

The K-Jet CIS Constant Idle System uses a TPS throttle position switch that open at idle and closed under load. The Volvo LH setup uses a TPS that is closed at idle and open under load, which is the opposite of K-Jet. I'm wondering if your TPS has been swapped to a non-volvo one so that the switch is open at idle and closed under load as needed by the K-Jet CIS box. If you unplug your TPS and measure the resistance between pins 1 and 2 (or whatever pins are wired up), is it open at idle and closed (0 ohms) when not-idle?

Do you know what model turbo, and what year exhaust manifold you have? Post pics? The original K-Jet Garrett turbos did not include a full CBV compressor bypass valve, but there was a little spring loaded valve on the K-Jet throttle plate to release pressure. The LH throttle plates don't have this, so you need a different turbo with a built-in CBV (like the later model 13C or 15G turbos). Without the CBV, you'll be stressing the turbo and intake pipes.

 

[Pietercc]

Do you know what model turbo, and what year exhaust manifold you have? Post pics? The original K-Jet Garrett turbos did not include a full CBV compressor bypass valve, but there was a little spring loaded valve on the K-Jet throttle plate to release pressure. The LH throttle plates don't have this, so you need a different turbo with a built-in CBV (like the later model 13C or 15G turbos). Without the CBV, you'll be stressing the turbo and intake pipes.

Or the early 700 series style external cbv. Then you dont need a new turbo