inovative91

just turbo;d my civic and its got blow by...what is the cause of this and how would i go about fixing this/? please help if you know

thanks !

speedooo

bad intake manifold gasket, something that has coolant and air going through side by side

confucioussae

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedooo &raquo;</TD></TR><TR><TD CLASS="quote">bad intake manifold gasket, something that has coolant and air going through side by side</TD></TR></TABLE>

???

look here https://honda-tech.com/zerothread?id=1199935

blowby happens because you have too much pressure building up in your crankcase from boost, and its "blowing" oil past your rings. best way to approach this prob is hook up a catch can. correct me if i'm wrong

speedooo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by confucioussae &raquo;</TD></TR><TR><TD CLASS="quote">

???

look here https://honda-tech.com/zerothread?id=1199935

blowby happens because you have too much pressure building up in your crankcase from boost, and its "blowing" oil past your rings. best way to approach this prob is hook up a catch can. correct me if i'm wrong</TD></TR></TABLE>


my old boss/mechanic referred to blow by as coolant seeping into the intake burning off like a blown headgasket...i guess just different definitions

sageuvagony

Blow by is when stuff gets passed the rings.

excivicboy96

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by confucioussae &raquo;</TD></TR><TR><TD CLASS="quote">
blowby happens because you have too much pressure building up in your crankcase from boost, and its "blowing" oil past your rings. best way to approach this prob is hook up a catch can. correct me if i'm wrong</TD></TR></TABLE>

No,

Its when pressures from the combustion chamber escape past the rings and into the crank case. It doesn't always happen when you add boost. It doesnt "blow" oil past your rings. Oil shouldn't be in the combustion chamber. The factory uses a system called a PCV. Which directs blowby gases into the intake to be burnt off.

sageuvagony

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by excivicboy96 &raquo;</TD></TR><TR><TD CLASS="quote">

No,

Its when pressures from the combustion chamber escape past the rings and into the crank case. It doesn't always happen when you add boost. It doesnt "blow" oil past your rings. Oil shouldn't be in the combustion chamber. The factory uses a system called a PCV. Which directs blowby gases into the intake to be burnt off.</TD></TR></TABLE>

Yep yep! It's like how people use seafoam. Because you get blowby, the seafoam and crap combusting in the chamber doesn't all escape in the exhaust port, instead it blows passed the rings downwards and then diluting your oil. Some cars have much more blowby than others depending on the rings.

Then again, blowby I don't think would only mean downwards. I think it could also work upwards. Why do people with bad rings burn massive oil then? Oil gets passed the rings.

inovative91

so what should i adress first a pcv valve and how is a catch can installed? i really appreciate the feed back.

yoffer

You can, but if blow by keeps coming back then you might want to look into replacing your rings.

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedooo &raquo;</TD></TR><TR><TD CLASS="quote">bad intake manifold gasket, something that has coolant and air going through side by side</TD></TR></TABLE>

What the **** does blowby have to do with the intake manifold gasket?

@ OP:
The cause of blowby is leaking piston rings...the fix? Complete rebuild, unfortunately.