PCV Valve and engine pressure issues Advice needed ASAP

[ACR_VP]

Whats the spark plugs going to tell me?

If you pull out all 10, and a couple of them are oil fouled (black, or have oil on them) then you found which cylinders potentially have bad rings.

Could be valve seals/guides too. But yeah this don't sound good. Would be curious how much air you have coming out when you remove oil filler compared to a similar Viper when revving up at neutral.

If that were the case he would more than likely have a nice cloud of white smoke every time he starts the car after it sits for a few hours. And if he was putting that much air into the valve covers to force oil through the seals/guides, he'd be collecting a fair amount in his can. It's going to be rings

[Fatboy 18]

OK here's the pics of the Plugs starting with the Right Hand Side of the Engine from Front to back.
For added information, I use standard european 95 octaine fuel in the car, not the premium octaine 98
No 1 front Plug RHS by Fatboy 18, on Flickr
No 2 Plug RHS by Fatboy 18, on Flickr
No 3 Plug RHS by Fatboy 18, on Flickr
No 4 Plug RHS by Fatboy 18, on Flickr
No 5 Plug RHS by Fatboy 18, on Flickr

Now the Left HandSide
No 1 Plug LHS by Fatboy 18, on Flickr
No 2 Plug LHS by Fatboy 18, on Flickr
No 3 Plug LHS by Fatboy 18, on Flickr
No 4 Plug LHS by Fatboy 18, on Flickr
No 5 Plug LHS by Fatboy 18, on Flickr

Now to me they all look fairly even colour wise?

[Fatboy 18]

Bought this,

New Compression tester by Fatboy 18, on Flickr

So will give it a go on the weekend.

[SlowPoke McGee]

I copy and pasted this from Mobil 1 site but you probably already know:

When doing leakdown test, listening for where the air is escaping by ear can isolate the problem.

Intake valve : Air whistling out of the intake, carburetor or throttle body indicates a leak at the intake valve.
Exhaust valve : Air heard hissing out of the tailpipe, turbocharger or exhaust manifold means an exhaust valve leak.
Piston rings : Whistling or hissing out of the PCV valve, oil filler cap hole or dipstick tube means the air is pushing past the rings. Suspect ring or cylinder wall wear.
Head gasket : Air bubbles in engine coolant seen at the radiator filler cap could mean air escaping into the coolant past the head gasket.
Cracked cylinder head : Bubbles in coolant or coolant being pushed up out of the radiator neck can also indicate cracks in the cylinder head or cylinder walls.

[SlowPoke McGee]

If you pull out all 10, and a couple of them are oil fouled (black, or have oil on them) then you found which cylinders potentially have bad rings.



If that were the case he would more than likely have a nice cloud of white smoke every time he starts the car after it sits for a few hours. And if he was putting that much air into the valve covers to force oil through the seals/guides, he'd be collecting a fair amount in his can. It's going to be rings

Typically I would agree with this but seeing a plume of smoke right after WOT, would there not be significant vacuum created upon decel which could pull oil through worn exhaust valve guides/seals?

[Lemay88]

You have regular 95 octane and 98 octane premium pump gas...
Max pump octane gas here in Canada is 94 and not available everywhere....

[Fatboy 18]

You have regular 95 octane and 98 octane premium pump gas...
Max pump octane gas here in Canada is 94 and not available everywhere....

Yes we do

In the UK, the most common petrol types are:

unleaded fuel

Ordinary unleaded – 95 RON

Super unleaded – 98 RON

[Dan Cragin]

The system you are running is not hooked up properly and is too small to adequately vent the crankcase. Your are running vacuum to the system, that should be blocked off.

You need to run vent hoses from each valve cover (3/4 inch) to a catch can with a large filter. EED makes a very nice setup that we use on all of our track cars.

[SlowPoke McGee]

The system you are running is not hooked up properly and is too small to adequately vent the crankcase. Your are running vacuum to the system, that should be blocked off.

You need to run vent hoses from each valve cover (3/4 inch) to a catch can with a large filter. EED makes a very nice setup that we use on all of our track cars.

Yeah signs do point to a PCV issue but what would explain the smoke plume after WOT? Fat boy, did that occur before or after your PCV modifications?

[Dan Cragin]

The production PCV system will cause smoking during very hard braking (track use) as the oil in the sump gets pushed into the front and is sucked into the intake manifold.

On this car, the intake manifold vacuum hose is hooked up to the breather, on hard acceleration oil is being pulled into the intake.

Hope this helps.

[Fatboy 18]

The production PCV system will cause smoking during very hard braking (track use) as the oil in the sump gets pushed into the front and is sucked into the intake manifold.

On this car, the intake manifold vacuum hose is hooked up to the breather, on hard acceleration oil is being pulled into the intake.

Hope this helps.

Thank you Dan for the input. Any recommendations on what to do next? Bear in mind i'm in the UK so any advice is much appreciated

[GTS Dean]

It's a gonner. Shitcan the thing.

[BrianACR]

It's a gonner. Shitcan the thing.

Lol dont' do that! I'll give you $100 for it

[Dan Cragin]

To partially solve your current issue. Plug off the "T" that comes out of the intake on both sides, then route each valve cover vent into the breather.

[Fatboy 18]

It's a gonner. Shitcan the thing.

[SlowPoke McGee]

To partially solve your current issue. Plug off the "T" that comes out of the intake on both sides, then route each valve cover vent into the breather.

Super advice. Great to have a resident Viper expert around. I've always enjoyed Dan's straight forward advice.

I'd still do a leak down test just to see what shape your motor is In. In fact I think I'm going to pick up one of those kits and do that with mine as well.

[daveg]

Whats the spark plugs going to tell me?

Look for excessive oil deposit on plugs,
http://www.gsparkplug.com/shop/spark...ult-diagnosis/
I would do it after some hard runs.
does it puff smoke after the car is shut off for a bit then fired up? If so, that could be valve guides /Seals.

[Fatboy 18]

Look for excessive oil deposit on plugs,
http://www.gsparkplug.com/shop/spark...ult-diagnosis/
I would do it after some hard runs.
does it puff smoke after the car is shut off for a bit then fired up? If so, that could be valve guides /Seals.

No it does not Puff smoke on fire up.

[LifeIsGood]

Glws

[Fatboy 18]

Glws

MY car is not EVER leaving my possession, its a Keeper!

[RPM9000]

MY car is not EVER leaving my possession, its a Keeper!

Mark that's the same way I feel about my car.

[Fatboy 18]

Stage 1, Performed a compression test today. Brand new compression tester.


Cylinder numbers given as per the workshop manual running left to right, right to left.
Started up engine and waited for it to warm up. No smoke on start up.

Pic 1 Oil Pressure on start up
J3 PIC BACKUP 567.jpg

Pic 2 Battery condition
J3 PIC BACKUP 569.jpg

Pic 3
Initial temp that engine was switched off, all spark plugs removed and compression test started
J3 PIC BACKUP 570.jpg

Cylinder 1 152psi Cylinder 2 150psi

Cylinder 3 150psi Cylinder 4 160psi

Cylinder 5 148psi Cylinder 6 152psi

Cylinder 7 152psi Cylinder 8 156psi

Cylinder 9 150psi Cylinder 10 145psi

Workshop manual states Compression should not be less than 100psi and not vary more than 25% between cylinders

So by that theory I am well within tolerances.

Sadly I don't have the kit to perform a leakdown test

Any thoughts?

[ACR_VP]

it's confusing looking through everything, what are the current problems, with all the can's hooked up, that you are experiencing?

[Fatboy 18]

it's confusing looking through everything, what are the current problems, with all the can's hooked up, that you are experiencing?

CCV Grommet not sealing and oil filling up fined pockets under intake manifold, (I believe due to increased crank case pressure). Rear exhaust tips (Fully decatted exhaust) feel sooty and oily. Valve cover breather vents went to a catch can with a breather filter on top, after a couple of TRACK sessions, hardly any oil in the actual can but the pressure in the can forced the oil out of the breather filter, spewing it out over the front of the engine and hood liner.

[ACR_VP]

CCV Grommet not sealing and oil filling up fined pockets under intake manifold, (I believe due to increased crank case pressure).

OK that one I haven't seen happen, but i mean the rubber on the grommet is like 20 years old so maybe not surprising? Did you replace the vent yet?

Rear exhaust tips (Fully decatted exhaust) feel sooty and oily.

Yeah pretty much any decatted exhaust will feel like that, you are feeling a mixture of oil/gas. I bet you could hold up a paper towel to the exhaust, give it a rev, and see a nice mist of unburnt fuel on the towel.

Valve cover breather vents went to a catch can with a breather filter on top, after a couple of TRACK sessions, hardly any oil in the actual can but the pressure in the can forced the oil out of the breather filter, spewing it out over the front of the engine and hood liner.

Are you certain the baffles are installed in your valve covers? Are you also certain of your oil level in the pan? Have you modified the pan / windage tray at all?