PCV Oil Catch Can, see what your engine is burning!

[herkyhawki]

Originally Posted by BlazerLT

The rest will accumulate in the upper plenum and drain back into the crankcase where it will contaminate the engine oil faster.

There is no path for drainage to flow from the plenum to the crankcase. Once the oil mist reaches th plenum it will stick there or stick in the intake runners or flow into the combustion chambers.
Overall this filter is a good idea if you remember to service it regulaly. I used to think all the black coating in the intakes was from EGR, but now I see that at least some of it is from PCV.

[ZL1power69]

Originally Posted by herkyhawki

There is no path for drainage to flow from the plenum to the crankcase. Once the oil mist reaches th plenum it will stick there or stick in the intake runners or flow into the combustion chambers.
Overall this filter is a good idea if you remember to service it regulaly. I used to think all the black coating in the intakes was from EGR, but now I see that at least some of it is from PCV.

on the cpi 4.3, there are holes in the lower plenum that can allow oil and gas(if cpi is leaking) down into the crankcase.

[ZL1power69]

LT, here are the pics u requested;

as u can see, i left some slack in the hose that is between the a/c accumulator and the pcv. the pcv sits perfictly flat in the hole.



and here is the shot of the hose at the throttle bracket. i could not remove the stock hose so i used a 3/8 hose coupler to join the old with the new and put a clamp on there to be safe, but i may remove the clamp later.

[herkyhawki]

Originally Posted by ZL1power69

on the cpi 4.3, there are holes in the lower plenum that can allow oil and gas(if cpi is leaking) down into the crankcase.

Please explain how this can be true. If there are holes that would allow oil to drain, the same holes would allow blow-by to flow directly from the crankcase into the plenum. This would short-circuit the PCV system and make it inoperative. If these holes existed they would be a major vacuum leak that would cause additional serious problems. There are no holes in the plenum that connect to the crankcase.

Gasoline from a leaking CPI can reach the crankcase, but it does so through leaky gaskets, or by leaking into the combustion chambers and then leaks past the piston rings to reach the crankcase.

[BlazerLT]

Originally Posted by herkyhawki

Please explain how this can be true. If there are holes that would allow oil to drain, the same holes would allow blow-by to flow directly from the crankcase into the plenum. This would short-circuit the PCV system and make it inoperative. If these holes existed they would be a major vacuum leak that would cause additional serious problems. There are no holes in the plenum that connect to the crankcase.

Gasoline from a leaking CPI can reach the crankcase, but it does so through leaky gaskets, or by leaking into the combustion chambers and then leaks past the piston rings to reach the crankcase.

Yes, there are two holes that drain into the two middle cylinder areas of the crankcase.

That is why when the nut kit ruptures you always see a #3 misfire and #3 plug being completely carboned up.

[BlazerLT]

Originally Posted by ZL1power69

You should remove that old PCV hose and run a new line directly to the hose connection right on the intake.

And yes, you can take it off. Remove it when you engine is warm and you will see that you can easily pull it right off.

It is just a rubber connector up there onto the hose nipple.

[ZL1power69]

Originally Posted by BlazerLT

You should remove that old PCV hose and run a new line directly to the hose connection right on the intake.

And yes, you can take it off. Remove it when you engine is warm and you will see that you can easily pull it right off.

It is just a rubber connector up there onto the hose nipple.

ok, i'll do that tonight. the system works great. every 30-40 miles the level in the filter goes up. im glad i have that on there now.

[BlazerLT]

Originally Posted by ZL1power69

ok, i'll do that tonight. the system works great. every 30-40 miles the level in the filter goes up. im glad i have that on there now.

Just remember that the stock rubber coupler can be removed as well.

When you have properly removed it, you will be attaching the new hose directly onto a metal hose connection.

[ZL1power69]

i'm on it boss!

[herkyhawki]

Originally Posted by BlazerLT

Yes, there are two holes that drain into the two middle cylinder areas of the crankcase.

That is why when the nut kit ruptures you always see a #3 misfire and #3 plug being completely carboned up.

What??? Let's start with simple definition. Crankcase= lower end of the block which houses the crankshaft, (thus the name"crankcase") bearings, connecting rods...

If the leaking fuel reaches the #3 plug as you say, then it is not reaching the crankcase. It is leaking into the #3 combustion chamber, (top of the #3 piston). So your example is additional proof that what I posted is correct. There are no hole between plenum and crankcase.

[BlazerLT]

Originally Posted by herkyhawki

What??? Let's start with simple definition. Crankcase= lower end of the block which houses the crankshaft, (thus the name"crankcase") bearings, connecting rods...

If the leaking fuel reaches the #3 plug as you say, then it is not reaching the crankcase. It is leaking into the #3 combustion chamber, (top of the #3 piston). So your example is additional proof that what I posted is correct. There are no hole between plenum and crankcase.

Ok, kewl down man, you are taking this a little too serious and personal. Lower the angst a bit.

It will drain into the two middle cylinders and into the crankcase.

[drdd]

installed my oil catch can tonite. ten minutes tops.

Got a Campbell-Hausfeld filter from WalMart for $11.97. the two fittings for $1.94. The hose was $1.18 at Advance Auto. I bought 3 ft.

I got a 1997 and so the PCV is about 3 inches from the intake connection. I routed mine up from the valve cover, around the master cylinder, back towards the brake booster, and back over to the intake. Didn't even need any cable ties to secure (although I'll keep an eye on it). The filter sits close around the brake booster. Plenty of clearance around hot rad hoses.

First start up, idle was spot-on (left the filter in).

I like to think my engine is pretty clean so it will be interesting to see how much oil accumulates in how much time ...

Originally Posted by BlazerLT

Ok, kewl down man, you are taking this a little too serious and personal. Lower the angst a bit.

It will drain into the two middle cylinders and into the crankcase.

[BlazerLT]

Originally Posted by drdd

installed my oil catch can tonite. ten minutes tops.

Got a Campbell-Hausfeld filter from WalMart for $11.97. the two fittings for $1.94. The hose was $1.18 at Advance Auto. I bought 3 ft.

I got a 1997 and so the PCV is about 3 inches from the intake connection. I routed mine up from the valve cover, around the master cylinder, back towards the brake booster, and back over to the intake. Didn't even need any cable ties to secure (although I'll keep an eye on it). The filter sits close around the brake booster. Plenty of clearance around hot rad hoses.

First start up, idle was spot-on (left the filter in).

I like to think my engine is pretty clean so it will be interesting to see how much oil accumulates in how much time ...

Keep us posted WITH PICTURES!

[drdd]

Well, installed the oil-catch last nite. I only drove 11 miles today!! Lookie how much I caught!

Hey BlazerLT, does your oil-catch have a purge at the bottom "nipple" of the cup? Mine does.

Anyhow, here are pics ... I know you guys out there wish your girlfriend was as dirty as my engine compartment !!


1) routed around the master cylinder and up by the brake booster

http://photobucket.com/albums/b390/d...t=P1010055.jpg



2) front end drivers-side view ...

http://photobucket.com/albums/b390/d...t=P1010057.jpg



3) this much after only 11 miles !!

http://photobucket.com/albums/b390/d...t=P1010058.jpg



still haven't found a need to cable-tie anything down. I'll keep an eye on it ...

Originally Posted by BlazerLT

Keep us posted WITH PICTURES!

[BlazerLT]

Yes, there is a purge but you can't use it.

You will have to unscrew it and dump it out like I did every time it gets reasonably full.