IDI high RPM run away. From crank case vent. 1984 Jetta TD

[RabbitJockey]

here is how i did mine i had major blow by issues so i routed it to that bottle at first to make sure the problem was solved, the power towels in the bottle never got dirty so i reconnected the hose to the intake, and the problem was completely solved, not more excessive oil in the intake and no more run aways.  i bought this car in 07 and it had a few issues, 1 was a starting issue because somebody put the 2 copper washers on the banjo bolt both on the same side so it was sucking air into the fuel line.  and it also had major run away issues when i'd drive it on the highway it would start blowing all this white smoke out and start pulling like crazy the power was impressive for a 1.6na.  It was also an automatic and the old diesel automatics would go into neutral when you left off the throttle, well one day i decided to try driving my new car to work, and i was cruising down the highway when it started to run away, i usually had it set to stay in drive when i was on the highway, but i forgot this day, and when it started running away i left off the pedal, so the transmission went to neutral and the engine just started screaming at max rpm as it fed off its oil.  it was really amazing i wish i had recorded it.  i pulled off on to the shoulder and contemplated slamming it into drive to stall it then i popped the hood and got out and stared at the engine trying to figure out how to stop it while its sitting there screaming, i noticed all the traffic was going very slow  so i looked up, and the entire 4 lane highway was completely filled with dense white/blue smoke all the way up above the tree line, it was amazing my tiny car was sitting there producing this gigantic cloud that had brought traffic to almost a complete hault.  then it hit me, and i held my hand over the intake pipe and it stalled.  engine was hydrolocked so i had it towed home and my dad and i reringed it.  afterwards i had the same issue although less severe.  at first i just put the valve cover breather into a soda bottle i cut holes into and filled with paper towels, but when ever i would get on the highway it would have a blow and fill the bottle with oil.  so i got the front block breather port off a diesel jetta in the junkyard and installed it and then added a hose that i teed into the existing valve cover vent, and problem solved, i never had any issues again, the car ran amazing after that i drove it for a year or 2 and sold it(regretfully.) but its still kicking and is driven frequently

[RabbitJockey]

[wolf_walker]

It never ceases to amaze me how worn out these things can be and still get people around.

Sent from my SCH-I535 using Tapatalk 2

[GTFORZA]

Go to Page 130 of this manual.  Save it to some place on your own machine because the information is golden for us old engine abusers.

www.fostertruck.com/Files/VW_diesel_77-83.pdf

Shows it as you would have it for a stock or additional add on.  All you need to do is patch in a hose between your existing vent from the valve cover to the air cleaner box.  Simple tee will do it.  Then run a hose to the hose that comes from the block to the vacuum pump. Another tee in there and you have simulated the function with the simple addition of two tees and a 2 foot piece of hose.  

Ta Da.  

Moderator?  Can or is this pdf on our stickys?  Or FAQ?  

wow that link is amazing. no kidding about the gold bit

[wolf_walker]

Go to Page 130 of this manual.  Save it to some place on your own machine because the information is golden for us old engine abusers.

www.fostertruck.com/Files/VW_diesel_77-83.pdf

Shows it as you would have it for a stock or additional add on.  All you need to do is patch in a hose between your existing vent from the valve cover to the air cleaner box.  Simple tee will do it.  Then run a hose to the hose that comes from the block to the vacuum pump. Another tee in there and you have simulated the function with the simple addition of two tees and a 2 foot piece of hose.  

Ta Da.  

Moderator?  Can or is this pdf on our stickys?  Or FAQ?  

wow that link is amazing. no kidding about the gold bit

I've had that in my collection for awhile, there is a page with some quick performance estimation figures for acceptable acceleration that is interesting reading. 

[8v-of-fury]

18.5 0-60 for 5 spd
16.3 0-60 for 4 spd

Approx. thats slooooooooooow haah

[wolf_walker]

Not that slow for a bone stock average NA 1.6 really.
We're spoiled 

I always thought 0-60 figures were crap on these things with there
propensity toward notchy slow shifting.  I usually use a rolling
x-mph to x-mph in one gear for comparison.

[RabbitJockey]

mine did not seem worn out other than the blow by, it had good power for a 1.6na with automatic trans, and also got atleast 40mpg no matter how or where i drove, and always started in the cold.  it may have been an issue with the amc head that was on it, im not sure.

[wolf_walker]

mine did not seem worn out other than the blow by, it had good power for a 1.6na with automatic trans, and also got atleast 40mpg no matter how or where i drove, and always started in the cold.  it may have been an issue with the amc head that was on it, im not sure.

Yep, btdt.  I had a TD with next to no idle oil pressure and the valves were so loose in the guides it was comical.
Still drove and got decent MPG and power for as long as I wanted to.  They just go and go..

[DRP67207]

I have a question about splicing into the breather tube to the intake.  Is there a reason to tee into this and maintain the hose into the intake on a 1.6 NA as opposed to simply rerouting the hose coming off the valve cover all together down to the front of the block and plugging the hole on the intake manifold? I am planning to do one of these two options to the engine in my caddy, as there seems to be a fair bit of oil blowing by and entering the intake.  No runaways yet, but I want to keep it that way... 

So is the line into the intake important? I've seen some pictures of, I believe, 1.9's with just a hose coming off the valve cover and down into the front of the block. Any downside to this simpler setup?

Thanks for any thoughts or advice.

[ORCoaster]

My thoughts and advice.  Take or leave both.

Simply routing the hose from the crankcase to the valve cover will not pull the excess pressure out of the engine.  That is what venting to the intake is all about.  Sure you can vent it to the outside, many do and they all have a smell of oil on them if you talk to them.  Ask R.O.R.  Actually there is no problem with it.  If you were around in the 60's you saw all kinds of cars with that dong hose smoking under the hood. 

Taking it into the engine burns it up and that makes it cleaner?  Some would say not but I know that the oil residue is not glomming onto the other parts of the engine.  And I don't have to smell it coming in the vents as I drive.

I would recommend the total package.  That is clean and responsible.  But you have to vent it out of the engine.  Simply tying the top to the bottom with a hose is going to cause trouble.  You will be blowing oil out of the Valve cover in short order I think.  Or a lower seal and then what.  Tear it down all for the lack of a 3 dollar tee?  Splice one in there it will do the job and save you a major headache later. 

That will be 2 cents please.

[fatmobile]

Those baffles are under 3$ at autohausAZ.
19.95 at parts place, sounds about right.

[wolf_walker]

Those baffles are under 3$ at autohausAZ.
19.95 at parts place, sounds about right.

  Shame about those guys...

[R.O.R-2.0]

My thoughts and advice.  Take or leave both.

Simply routing the hose from the crankcase to the valve cover will not pull the excess pressure out of the engine.  That is what venting to the intake is all about.  Sure you can vent it to the outside, many do and they all have a smell of oil on them if you talk to them.  Ask R.O.R.  Actually there is no problem with it.  If you were around in the 60's you saw all kinds of cars with that dong hose smoking under the hood. 

Taking it into the engine burns it up and that makes it cleaner?  Some would say not but I know that the oil residue is not glomming onto the other parts of the engine.  And I don't have to smell it coming in the vents as I drive.

I would recommend the total package.  That is clean and responsible.  But you have to vent it out of the engine.  Simply tying the top to the bottom with a hose is going to cause trouble.  You will be blowing oil out of the Valve cover in short order I think.  Or a lower seal and then what.  Tear it down all for the lack of a 3 dollar tee?  Splice one in there it will do the job and save you a major headache later. 

That will be 2 cents please.

Lots of us run a RDT, and if you dont mind your car marking its territory, then you are golden!

i NEVER smell breather gasses.. just diesel exhaust..

[bajacalal]

If you were around in the 60's you saw all kinds of cars with that dong hose smoking under the hood.

My 1992 truck came from the factory with the crankcase vented straight to atmosphere. I guess pickups were exempt from a lot of EPA stuff. It's something I've been thinking about trying to "fix" but I haven't decided how to go about doing it.

My VW never has blowby except when the turbo spools up, then it does. I think that's why they started putting those baffle things on the turbo cars, so they're probably necessary for that application, along with the "hockey puck" oil breather.