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Old 06-17-2013, 07:45 AM   #1
marn
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Default Is this kind of blow by is normal?

The other day for some reason my car started to lean while i was WOT it.

When i got home, i smell some burn oil but there was no smoke anywhere so i decided to pull the pcv hoses and found that on the passenger side hose there was little smoke coming out.

https://www.youtube.com/watch?v=tVVGRusuQhQ

This was on operational temperatures,also in the video you can notice the engine mechanical noise are high while on normal temperatures.

If i put a modified relay i made so the main fan runs on switch,the engine runs cold and there is zero blow by and less mechanical sounds.The oil is rotella t6, same oil i have been using for months so i don't know what is causing the little smoke besides that is normal to do that. There is no smoke on the drivers side hose even if the engine is hot.

Here is the compression test,sorry that looks dark but we worked the car at night.

https://www.youtube.com/watch?v=QbeB8PouEEg

Test was done with the car semi hot and with all plugs out. Pistons are cp drop in 9.0.1

We also retuned the car and increased more power w/o issues.

Here is the video i made lol, i record most things i do on the car since first day i got it.
https://www.youtube.com/watch?v=dyv14lmD_d0

As you see its running well and does not smoke at all. Any opinions on what is making the engine sounds like that or why the smoke on the passenger side pcv hose when hot?

Thanks in advance.
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Old 06-17-2013, 08:11 AM   #2
dstroy
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The noise you hear with the pcv hose unplugged is exaggerated valvetrain noise. Does that gas smell like exhaust or raw fuel?
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Old 06-17-2013, 08:18 AM   #3
marn
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The smell is that day was like something burn under the hood,but after tuning it just smell like gas. For some reason it only happens on operational temperatures,if i run the car with the main fan direct it does not smoke or sound like that.
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Old 06-17-2013, 08:22 AM   #4
dstroy
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I see that you did a compression test already. Did you happen to do a leakdown test also?
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Old 06-17-2013, 08:23 AM   #5
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Nope, i don't have a compressor to do it.
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Old 06-17-2013, 08:27 AM   #6
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You should try to get one done, if the gas coming out of the pcv smells like raw fuel it could be a leaky intake valve on #1 or #3.
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Old 06-17-2013, 09:12 AM   #7
marn
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Forgot to mention

Boost gauge is reading 19/20 inhg on idle,no smoke coming out the feeler or the tube where the stick goes,car turns on a single crank like just put the key ,turn and turns on fast and normal(not like when engine bends valve that they wound weird when starting up)

Went to the bank almost now,plugged the modified relay so the fan turns on using the switch,step on the gas on my way home,pull out the hose and accelerate while on the garage and.... No smoke at all coming out the PCV hose...

It smoke only when running the engine normally at operation temperatures.
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Old 06-17-2013, 09:20 AM   #8
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Yeah, smoke out of the filler tube would be indicative of an entirely different problem. And I didn't say that you bent a valve, but you might have a bad stem guide or seal. The only way to tell for sure is with a leakdown test. The engine also does a couple things differently once the coolant reaches a certain temp. So running your fans constantly might be keeping it under that temp and masking an underlying problem. It really could be nothing, but you never know for sure until you test.

Last edited by dstroy; 06-17-2013 at 09:27 AM.
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Old 06-17-2013, 09:32 AM   #9
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Alright, i will ask a friend and see how the test goes.Thanks
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Old 06-18-2013, 09:18 AM   #10
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Drove the car for 1 hour today. The light smoke still comes when cold now and only on the passenger side.

0 smoke from exhaust,filler or the tube where the stick goes. Not consuming water or oil.

Mpg so far good, 19/20 inhg readings on boost gauge. Yet to find someone to do the leak down test.
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Old 06-18-2013, 02:45 PM   #11
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I wouldn't worry about it at all. It doesn't seem excessive. Besides, the looser motors are the power motors

Have you checked your intake piping/intercooler for oil residue? If there is enough oil in those parts, then the intake manifold could be swallowing some of that causing your lean issue under WOT.

I would look into a nice catch can setup. That is always a good mod to do.
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Old 06-20-2013, 07:13 AM   #12
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Thanks banshee, i was reading into that but seems you need 2 catch cans in order to make it work right.

So far the engine is pulling strong, i will check the oil later today and see if is consuming.
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Old 06-20-2013, 03:02 PM   #13
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Quote:
Originally Posted by marn View Post
Thanks banshee, i was reading into that but seems you need 2 catch cans in order to make it work right.

So far the engine is pulling strong, i will check the oil later today and see if is consuming.
Two catch cans aren't needed for a proper operation.

Realistically, a good catch can will need at least 2 ports (-8 or bigger), a drain and a big filter on top for proper ventilation.

Good ventilation is the key and so is the hose/port size. Basically, the bigger the better. If the hose size is to small, it will basically act like a jet stream for the oil/pressure going through the hose; which will cause the catch can to fill up faster and the engine not to vent like its suppose to.

For one catch can install, these are the instructions:

1. Tee both valve covers into one of the ports on the catch can.
2. Delete PCV and run a line from that port on the block to the other port on the catch can.

Ive been running it this way for years and have never had a problem. After a long night of continuous racing, there might have been 1-2oz of oil in there, this is with 4th gear pulls at 35psi.

Of course if your motor is hurt no catch can will stop the oil consumption.
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Old 06-20-2013, 04:31 PM   #14
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Quote:
Originally Posted by banshee04 View Post

Two catch cans aren't needed for a proper operation.

Realistically, a good catch can will need at least 2 ports (-8 or bigger), a drain and a big filter on top for proper ventilation.

Good ventilation is the key and so is the hose/port size. Basically, the bigger the better. If the hose size is to small, it will basically act like a jet stream for the oil/pressure going through the hose; which will cause the catch can to fill up faster and the engine not to vent like its suppose to.

For one catch can install, these are the instructions:

1. Tee both valve covers into one of the ports on the catch can.
2. Delete PCV and run a line from that port on the block to the other port on the catch can.

Ive been running it this way for years and have never had a problem. After a long night of continuous racing, there might have been 1-2oz of oil in there, this is with 4th gear pulls at 35psi.

Of course if your motor is hurt no catch can will stop the oil consumption.
Instead of teeing together two hoses each coming from the breathers on the heads, u can just run a line from the middle rail in front of the TMIC to your catch can. Thats if u still have a tmic.
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Old 06-21-2013, 07:01 AM   #15
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I still use the TMIC, thats a great idea btw.
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Old 06-21-2013, 10:06 AM   #16
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In regards to the pcv, i wanna know if its a good idea to delete it or keep it when using a catch can...
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Old 06-30-2013, 08:58 AM   #17
marn
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Following up since i post this, the engine hasn't consume a single drop of oil which is weird cause we even re tuned the car for 302 whp and 349 tq, the blow by still the same and yet the stick is marking full of oil...

Been using the car almost daily to work, last week all 7 days and yet today i check the oil and still full. Also wanted to point out that the oil smell like gasoline maybe cause im running the car with the main fan up causing the ecu to send more fuel besides that just a little smoke when wot but that's about it.
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