924Board.org

[Dutch924-racer]

I putting a rebuilt engine back in the 931 S2. I bought the car with the engine out, so that is wy I got the next questions:

- Where does the hose need to go on the bottom of the mass air flow thing.
- I want a oil temperature gauge but the M14x1,5 hole is used by the oil return hose. Where do you guys put the sender ?
- Is the airfilter housing directley connected to the oil separator (Purolator)
-I bought a revision set for the clutch cylinder, but how do you get the steel trust ring out of it ?
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller

[Smoothie]

[Dutch924-racer]

My airbox has just one hose. It is a european car.

Where does the hose from the air flow meter go, inlet manfold maybe ?

The I set the crankshaft and camshaft to TDC and the flywheel shows Z1 in the hole of the bellhouse, so that should be good.
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller

[Smoothie]

[Dutch924-racer]

First picture of the bottom of the fuel distributor , were should the hose go ?

Second of the purolator, I usume it will go to the turbo oil pipe ?

Third of a hose near the inlet manifold ??? Maybe it should be connected to the brakebooster ?






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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller

[ideola]

Re: the line from the air metering unit / fuel dizzy goes directly to the EEC that Smoothie pointed out in his photo above;

Re: the purolator line, I can't tell which one you are pointing to, but there are three lines as follows:
1. On the top of the unit facing the front of the car, a line goes directly to the airbox.
2. On the top of the unit facing the rear of the car, a line goes to the crankcase breather (under the intake manifold, hard to reach)
3. On the bottom of the unit facing the rear of the car, is the oil drain line that goes to the secondary port above the oil drain plug on the oil pan

Re: the y-pipe, yes, that one connects to the brake booster.
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erstwhile owner of just about every 924 variant ever made

[Dutch924-racer]

it is a european car that doesn't have ecc
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller

[ideola]

The EEC is teed into the vapor return line to the fuel tank, so I would assume it would plumb directly in on your car.
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erstwhile owner of just about every 924 variant ever made

[Dutch924-racer]

The Purorlator has got 3 connections:
one on front top, that goes to the airfilterbox
one on the bottom thta is the retourn to the oilpan
and third the one on the second picture, whre to go with that one ?
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937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller

[ideola]

The third connection (from your list) is the second connection (from my list) which is supposed to connect to the crankcase breather. It's on the side of the block way back underneath the intake manifold. Hard (but not impossible) to get to on a fully assembled engine.
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erstwhile owner of just about every 924 variant ever made

[Smoothie]

This one goes to the oil drain breather as you thought (and it seems to be going there already if that's it coming in at the bottom-right of your first pic) -


Some assitance from someone with an equivalent RoW 931 without EEC would be useful to confirm whether the connection at the bottom of the AFM unit [in your first pic] gets plugged or what...
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"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

[TurboJak]

I have the same routing in my 931.
The purolator "air output" (the top connection facing forward) goes directly to the fuel distributor connector. The airbox purolator input is plugged...
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'76 924 + '82 924T engine + GT look

[TurboJak]

Bit difficult to see in this diagram but think line 27 from purolator goes to 32 to line 12 to fuel dizzy. Line 34 goes to turbo oil breather. And 31 is plugged.
Thats how mine goes but not sure if its correct...

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'76 924 + '82 924T engine + GT look

[Smoothie]

TurboJak - Do you happen to know if your line from the top of the Purolator to the bottom of the AFM has a restrictor in it? (Asking because 924NAs that are routed that way, from the breather to a point between the air metering plate and TB, have a 5mm restrictor in the breather line. -And it would make sense for the 931 with that routing to have it also.)

-Or Dutch924-racer - If you have the original lines, and one that would fit between Purolator and AFM, if it has a restrictor in it, that would answer your question - just hook it up to the AFM connection. -But I'm sure it doesn't matter anyway, which one it's attached to and which one gets plugged..
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"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

[Smoothie]

Actually, after looking at that parts diagram again, apparently 32 would serve as the restrictor.
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"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox