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Engine Specific Info and Questions => IDI Engine => Topic started by: shwak23 on August 29, 2013, 07:04:51 am
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Well do you? Do the hoses need to remain the same size as stock or could one use something like the bfi valve cover and run some braided stainless with fittings?
Prefer to see setups that drain back into the block. But anything is fine.
No Mason jars ;)
Sent from Outer Space!
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My mason jar and vinyl hose stay pretty clean ;D
on the outside at least
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There is a surprising amount of volume on some of these engines going through that tube.. So tale that in to affect.
If you under size it you will cause pressure in the crank case.. and oil will start puking from places it should not.
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There is a surprising amount of volume on some of these engines going through that tube.. So tale that in to affect.
If you under size it you will cause pressure in the crank case.. and oil will start puking from places it should not.
I seem to recall you saying this in another thread which is why I asked to confirm.
I am not talking about using 3/8" line though. Just something a bit smaller. What's on there now? Like 1"? Would half inch line be ok? I seem to recall someone on this site having a setup with the catch can attached to the head somewhere and then leading to the block.
Sent from Outer Space
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I am no techie.
I have put a fitting on each engine I got between valve cover tube and the block fitting. But since that fitting was a smaller barb over the big one on valve cover, I have been just using that size as far as the hose/fitting going down to block.
Is that ok or would the block hose need to be the same size?
Your post just made me wonder :)
I made an inline catch can out of pvc cannister, plugs with threads for fittings and stainless steel balls inside and it definately did something on an engine I was using that had lots of blowby. Let it build up and go down into block.
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Does no one here have a nice setup? I think I have seen at least one. One of the more baller builds on this site. I don't recall who...
Sent from Outer Space!
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I recently removed my blowby setup. I picked up on a Volvo unit and had it plumbed into the VC and then down to a secondary catch can so I could easily empty any oil I was pulling out of the system. I only ran it for a while then the rings just gave up on the #3 cylinder so I pulled the head and did the proper repair.
So I have that catcher if you want to offer on it. Do me a PM and maybe we can set up something. I surely don't need it anymore.
DAS
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I'm running A/N fittings, braided line, and a Moroso puke tank mounted in front of the core support. It does not drain back to the block, however.
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I didn't drain mine back because I wanted to see how much oil it was going to pull out of the vapors going into the intake. I didn't keep it on long enough to find out.
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Im uneducated why a catch can?
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I recently removed my blowby setup. I picked up on a Volvo unit and had it plumbed into the VC and then down to a secondary catch can so I could easily empty any oil I was pulling out of the system. I only ran it for a while then the rings just gave up on the #3 cylinder so I pulled the head and did the proper repair.
So I have that catcher if you want to offer on it. Do me a PM and maybe we can set up something. I surely don't need it anymore.
DAS
The one I sold you was from a Mercedes-Benz 240D, late 70s or early 80s.
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Im uneducated why a catch can?
Same here. Why?
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I'm not quite done yet, but on an AAZ, a line from a fabbed fitting on the bottom of the crankcase breather up to a tee on this on the VC
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_8676.jpg)
Then on over to this on the drivers side strutt tower
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_5232a.jpg)
I'm actually just waiting for the Russell's stainless braided with blue AN fittings in 5/8 hose size.
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Wow - nice work Mr!
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I'm not quite done yet, but on an AAZ, a line from a fabbed fitting on the bottom of the crankcase breather up to a tee on this on the VC
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_8676.jpg)
Then on over to this on the drivers side strutt tower
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_5232a.jpg)
I'm actually just waiting for the Russell's stainless braided with blue AN fittings in 5/8 hose size.
Looks like it should be a very clean setup, but is there really room for the water heater under your hood? :D
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Im uneducated why a catch can?
Same here. Why?
Same here, also the pros and cons of the "caught" oil being send back into the engine?
enquiring minds want to know.
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Why a catch can? Well so it doesn't just go towards powering your car. If it is a diesel that is. Basic problem starts with excessive blowby. I say excessive only because all motors tend to have some. That is why manufacturers designed the valves on the top of the valve cover to allow those gasses from the bottom side of the engine to find a way out lest they pressurized it like a soda can and have it do very bad things.
So as the engine gets worn and tired the blowby, gas passing the rings to the lower engine, gets worse. Diesels have nearly twice the compression ratio as a gasser so they tend to produce blowby easy. Some engines are set up from the bottom crank side, to the top piston side, facilitated by the use of a black hose coming out the front of the motor near the oil filter and up to the Valve Cover where there is sometimes a restricting valve. But for most of us it just routes from the top of the valve cover to the air box with no restriction at all.
That means that the oil can become part of the fuel we burn and evenually we end up with much less than we need and if it gets to be too much some engines can just run on their own. Really scary, trust me, Shifting up to third and not getting it to return to idle going into fourth is a butt suck to the seat.
So why the can though? It is the means by which we without the valves can stop the flow and reduce the amount of oil burned. Now if you have a hose at the bottom of the can that returns any oil caught without assistance you don't have to maintain anything. For those of us that want to monitor everything about our engines. Is 10 gauges too many? We like to see how much oil is coming out of the system for the various ways we drive. Or maybe as a means of determining that we really do need to replace the rings.
So that is the reason for the can and as to pros and cons to catching the catch can crap. I think it amounts to being able to reroute it easily or not. Or if you want to see what the catcher is doing for you if anything.
Guys did I get this right? Too many engines to generalize about maybe.
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Thanks for the info!
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I'm not quite done yet, but on an AAZ, a line from a fabbed fitting on the bottom of the crankcase breather up to a tee on this on the VC
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_8676.jpg)
Then on over to this on the drivers side strutt tower
(http://img.photobucket.com/albums/v648/stewardc/Truck/100_5232a.jpg)
I'm actually just waiting for the Russell's stainless braided with blue AN fittings in 5/8 hose size.
Where does one find the pcv with threads you have pictured?
Sent from Outer Space!
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One of the advantages of keeping the stock system is the oil vapours coat the intake tract which acts like a secondary filter. The oil will catch fine dust and other junk that gets in when you check/change your air filter and just from what gets through the filter.
You run into serious issues when you have an EGR, but that's almost unheard of in VW IDI land.
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Where does one find the pcv with threads you have pictured?
In my garage. ;D No longer produced....sorry.