Guess I won the lottery with my Honda CL1 engine at 260K miles utilizing a moroso atmospheric breather, no check valve, two -10 AN lines to the VC and a -8AN drainback to the oil pan. It doesn't get any vacuum from the intake manifold or air intake.

 

You are telling me you purchased the vehicle new and before driving it you drilled the oil pan for a drainback and removed the OEM pcv system?

Combustion gas is deadly to an engine oil system so I do not believe this is the case at all. I think the engine had significant mileage before you did this modification. I also think if you have 50k or more with this mod the engine crankcase is full of sludge and dark color and the engine is almost trash time.

 

Bought the car at 16k miles. So it's been about 240k miles on the open breather.

 

Thats pretty nasty. Engine must be full of sludge. Once they get like that it can't be saved.

 

It isn't. VC was off about 30k ago for valve lash adjustment.

 

I have trouble believing you removed the engine from a brand new vehicle with 16k miles and pulled off the oil pan to drill and weld an oil return hose. Then removed the pcv valve. All for what, from a perfectly good running vehicle for no reason? Its not a performance car so why would you do that. And this is supposed to be 20 years ago? You kept the same car for 250,000 miles with no pcv system?

In any case its impossible what you claimed. No engine can remain clean for 200k miles without pcv. Pics and records or it didn't happen. Story is sus

 

https://www.corvetteforum.com/forums...post1604964329

Experienced mechanic talking about pcv.

"Engines without PCV create this ungodly sludge, tar, black jello kind of thing that would happen all through the inside of the engines... and would actually KILL THEM."
"Rings were shot... bearings... "
"Anybody that works on engines from modern era cannot appreciate"
"PCV actually helped everybody across the board"
"The most beneficial thing the government has ever done to internal combustion engine"

 

Published papers regarding combustion blow-by gas and PCV



People can ignore the experienced mechanics, tuners, doctors, engineers, published papers, at own risk

 

This Honda's Achilles heel is excessive blow-by and oil sucking directly into the intake via the valve cover breather port. The fix is to eliminate both the PCV run to the manifold and the breather run to the air intake.

article about this modification:
https://www.motortrend.com/how-to/ht...lation-system/

I'm not the first and not the last to do this mod. I've owned the car for 20 years and have been operating it this way. My open breather fittings are on the back of the VC versus the front like they did in the Motor trend article. Drag racing Honda guys generally orient in the front due to the g forces from only doing acceleration pulls. My car comes off full throttle for braking zones and other road racing guys seem to prefer placing them on the back of the VC.

I don't have some photos of me with a newspaper back in 2004 to show you, since it never occurred to me someone would be so religious about their perspective on PCV systems that they would be this unwilling to accept an engine doesn't explode because of a catch can or deleting the PCV for an open breather. I didn't take photos of my last valve lash adjustment either. Open breather systems are not something I invented, so I'm not sure why this is some new foreign idea.

Oils have detergents in them. The reason sludge doesn't accumulate has more to do with changing your oil and using one with enough detergents. PCV isn't the main way to fight sludge.

Photo that happened to be on my phone from last year after eliminating the distributor and coil. Engine now runs coil on plug. Notice the lack of the original breather to intake hose. Notice the missing PCV to manifold run. Instead there are two -10an hoses.


Video I also had on my phone some early 2022 when I burped coolant after transmission reinstall: https://photos.app.goo.gl/eo8G5Eww8jjd5Kme8

I believe that you honestly believe what you are saying to me. That's a bit saddening.

Edit: Took a shot of the odometer this morning.

 

Direct injection , gen v. Have you seen the intake valves @5k miles.

 

Anyone know if it's possible to snake a camera through the throttle body then into the intake runners to get a look at intake valve(s) on the Gen V LT1? I have a camera but not sure if it's doable. Or if the intake has to be removed.

 

Just drill some holes above the port and take a look. After just fill the holes with RTV, good to go!



NO, REALLY DON'T DO THAT !

REPEAT, REALLY DON'T DO THAT !

I think it would really be hard to get the probe lined up thru the intake with the port to see anything but I never tried.

 

What I've done in the past on others engines is put the cylinder on the intake stroke, then run the endoscope through the spark plug hole. Facing forward you can often see the valve when going in and see any deposits. I also have a little mirror attachment on it that allows me to view back towards the head.

 

The intake manifold comes off in about 20 minutes. Very easy to take off since it's dry and has re-usable o-ring gaskets.

I have a Elite Catch can. My car had a lot of oil in the intake track when I bought it and changed the oil the first time. I suspect the dealer or previous owner overfilled it and caused all the oil sitting in the air filter and intake. It was bad.

I check/drain my catch can every 1-2k miles and there is about 1-2 oz of oil in it. I have no idea if the catch can caused the additional blow by since it's plumbed between the crankcase and the air intake. But, I'm going to keep it on for now.

Heck Ford sells a factory backed add on catch can for GT350's since they have so much blow by.

 

Am I right to assume you have a wet sump car?

EDIT: Ford has a catch can available for the ecoboost mustangs as well.

 

Z51 so dry sump.

 

Same thing, mine had a bunch of oil in the intake tube likely from an overfill too. I removed the tube and cleaned everything out real good. I'll keep an eye on it moving forward.

 

I was in Camaro5 before I got my C7. Everyone there swears by their catch can.

 

stock for stock, many cars can get by fine without a can (most cars on the road do not have them)
if you find yourself in that category then great

but if you have changed anything with the engine, then you have no longer the magical recipe the OEM engineered their vent system to be optimal for

-if you want your engine to consume less oil through the vent system (power, efficiency, maintenance)
-if you would like to do this without raising crankcase pressure, or even lowering it to offset for power increases
-if you need one for meeting racing class rules
-if you like mods or engine bay accessorizing

then you are in the market for one of our cans / systems

 

I have an ECS supercharger, Kooks long tube headers, catless xpipe, tuned.. Do I need a catch can?