engine bay hoses 1.8 L Jet, colors, arrangements etc Options

[wonkipop]

this topic arose in the thread concerning hose colors for D Jet cars.

i've started a new topic so it does not mess the other thread.

first thing to say is that the factory manual is more scant on L-Jet information than for D-Jet. There are no hose schematics with the clarity of the D-Jet layouts for the L-Jet. Secondly some of the information on the L-Jet is misleading.

First thing.

car 1974 1.8.

Green vacuum line from Distributor.
Seems to be the same as the D-Jet cars.

There is a green vacuum (retard) line out of the distributor body to the throttle body.
I think i am right saying its the retard side (sometimes gets dyslexic on that).

The green line in this photo is an original vacuum line. Along with the crankcase vent hose these are the only two lines i did not replace on my car. The crankcase line is moulded to an S - shape and we decided to stay with the original. its still sealing ok.
Same with the distributor line. We checked and still pliable and it was sealing so it stayed. We cleaned it up a little. I also left the intake manifold seals on as we did not go that far in - requires disassembly of the intake manifold. They are still in good sealing condition though looking a little aged.

There is a black vacuum (advance) line out of the distributor to the throttle body.

The green line from the distributor was the only colored line still apparent on my car.

[Van B]

I just stumbled onto this thread and now realized that my canister hoses are backward lol... thanks @wonkipop !

[Lockwodo]

I just stumbled onto this thread and now realized that my canister hoses are backward lol... thanks @wonkipop !

I'm just looking at this canister connection issue too. Just to confirm, does this mean the the diagram "Late-1974 Porsche 914 2.0L D Jet Fuel Injection Vacuum Hose Diagram" below attributed to Jeff Bowlsby is incorrect as regards the hoses hookup to the canister?

https://bowlsby.net/914/Classic/zTN_FI_Hose..._Late1974_A.jpg

[wonkipop]

I just stumbled onto this thread and now realized that my canister hoses are backward lol... thanks @wonkipop !

I'm just looking at this canister connection issue too. Just to confirm, does this mean the the diagram "Late-1974 Porsche 914 2.0L D Jet Fuel Injection Vacuum Hose Diagram" below attributed to Jeff Bowlsby is incorrect as regards the hoses hookup to the canister?

https://bowlsby.net/914/Classic/zTN_FI_Hose..._Late1974_A.jpg

no, it does not mean jeff's diagram is incorrect.
he knows his 2.0 L cars backwards.

it just means that the 1.8s are plumbed up the way discussed here.
only the 1.8 hose diagram that had been modified from an earlier 1.8 diagram was under discussion and "dispute".

its a grey area that has i think simply not been worked out with 100% certainty.

for sure there were two different practices in relation to plumbing these cans.
the VW schematic for all VW cars from 1969 onwards.
the porsche schematic for all porsche cars from 69 -73.

there is a couple of ways it could have panned out.

all that i know is that 74 1.8s with engine bay can got plumbed VW's way and from there all 1.8s to the end were plumbed VW's way.

i think you have to be careful assuming there was some kind of consistency to this across the entire range for the entire production period - esp when the two companies had contrary views on the plumbing arrangement for the can.

where it diverges, and where it changes, or if it changes, across the range of 914s over the years is the hard part and i don't think its fully known yet.