Serviced, now a pressurised oilcap???

[Welly]

Erm why is it a design flaw ? What is it with people lambasting the engines etc when they "uprate" other components past the supporting components designed limits.

Meh, anything that collapses under vacuum pressure has an inherent problem in my opinion!

We're not talking about running massive amounts of extra boost from the blower to cause TIP collapse, and extra couple of PSI has been known to cause it. All it would of taken to resolve this problem was a few metal supporting rings built into the TIP.

I don't personally think it was designed to be as good as it could be, which in my opinion is a design flaw. Inept designers? Maybe. I think things should be designed to withstand far more than they are put through on a day to day basis.

Anyway, you have your opinion. I have mine.

 

[badger5]

I personally think it was an unrelated fluke

how?

 

[Prawn]

because the pipe was already split Bill. Dave putting a plug in it did effectively nothing, as he was plugging the open end of a pipe already split further up it's length.

that's not to say that his crank case pressure hasn't been caused by a blockage elsewhere in the PCV system, as I said above.

 

[badger5]

PCV is a t-piece, the stumpy end of which is the one way valve for manifold vac
something got blocked else it would not build up the pressure. (some kinked pipe perhaps)

blocking the vac pipe which goes to the manifold should not have made any difference to crankcase pressure. it would free vent into the TIP on otherwise std pipework, unless that pipework had collapsed or kinked.

 

[Prawn]

thanks Bill, you've just confirmed exactly what I've been saying for this entire thread, although nobody seems to believe me.

 

[auroan]

Meh, anything that collapses under vacuum pressure has an inherent problem in my opinion!

We're not talking about running massive amounts of extra boost from the blower to cause TIP collapse, and extra couple of PSI has been known to cause it. All it would of taken to resolve this problem was a few metal supporting rings built into the TIP.

I don't personally think it was designed to be as good as it could be, which in my opinion is a design flaw. Inept designers? Maybe. I think things should be designed to withstand far more than they are put through on a day to day basis.

Anyway, you have your opinion. I have mine.

Anyway back in the real world there is something called a "cost/price ratio" You want something made to a higher spec, then you will have to pay more. Audi designs are spec'd to a given limit, going over board on the capability of components when its not needed would only either eat into profits or drive the price up.

So fancy paying more for your S3 ?

 

[badger5]

thanks Bill, you've just confirmed exactly what I've been saying for this entire thread, although nobody seems to believe me.

as described its a weird one..
stopping it breathing is the only way I can think it could presurise the crankcase, which is collapsed or kinked pipe most likely..

bizarro

 

[Frankus]

Hey, myself and Prawn, serviced my a3 1.8t today, consisting of oil and filter change, fuel filter and pollen filter.

we also noticed there was a massive split in the pipe that goes from the inlet manifold to the pcv check valve.

on prawns audi, his was also split, and we figured it was an emmisions based thing, so he cut the pipe and blocked it off going into the inlet valve. thus removing his boost leak. he didnt block off the pipe coming out the block. (as he couldnt be bothered)

we did the same on mine, but i didnt wanna leave the pipe open, so stuck a bolt in it.

when we turn the car on, it started and then cut out. started again and was ok.

when we get home (5 mile) i turn the car off, and went to top the oil up a bit, on undoing the oil cap it hissed, releasing pressure... im quite sure its never done that before! this isnt right surely ?

Any help appreciated.

Cheers Dave

 

[Erikn89nl]

5 year old thread, revived with a quote, and nothing else. Mystery to me.