Head Gasket / Valve seals? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Paragon · 06-17-2002, 06:17 PM

hey, i'm new to the board, i just got my 240, and i have a problem.  it idles just fine, but when the tach gets to around 2500, i get a lot of white/gray smoke coming out of the exhaust.  I was told it was probably either the head gasket or the valve seals, but i wasn't sure how to check either.  I know if it was the head gasket, fluids would be mixing in the engine, and i'm not having that happen.  What signs should i look for if it is the valve seals, or does any one else know what it might be?  It smells like it's burning oil out the back.  All my fluids are clean, no mixing, and it seems to rattle a little at low rpm.  Any ideas/input would be great.  thanks!

Jason

*sykikchimp* · 06-18-2002, 12:05 AM

black smoke = fuel = running rich (intake problem...)
Blue smoke = Oil = burning oil (valve seals, or rings )
White smoke = coolant = blown head gasket....

Are you burning oil b/w changes?
Get a leak down test down to see what exactly is leaking and where.

S13drift · 06-19-2002, 06:30 AM

Hey Paragon,

Check out the thread "Poor Performance".  I had a similar problem with my 240.  It's kinda of long so enjoy.  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'>

06-18-2002, 12:05 AM	#2
sykikchimp WOW addicted Join Date: Dec 2001 Location: the moon Age: 44 Posts: 6,525 Trader Rating: (0) Feedback Score: 0 reviews	black smoke = fuel = running rich (intake problem...) Blue smoke = Oil = burning oil (valve seals, or rings ) White smoke = coolant = blown head gasket.... Are you burning oil b/w changes? Get a leak down test down to see what exactly is leaking and where. __________________

06-19-2002, 06:30 AM	#3
S13drift Leaky Injector Join Date: Feb 2002 Location: Charlotte, NC Age: 47 Posts: 52 Trader Rating: (0) Feedback Score: 0 reviews	Hey Paragon, Check out the thread "Poor Performance".  I had a similar problem with my 240.  It's kinda of long so enjoy.  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''>

06-17-2002, 06:17 PM	#1
Paragon Join Date: Jun 2002 Location: Jacksonville, NC Age: 39 Posts: 23 Trader Rating: (0) Feedback Score: 0 reviews	hey, i'm new to the board, i just got my 240, and i have a problem.  it idles just fine, but when the tach gets to around 2500, i get a lot of white/gray smoke coming out of the exhaust.  I was told it was probably either the head gasket or the valve seals, but i wasn't sure how to check either.  I know if it was the head gasket, fluids would be mixing in the engine, and i'm not having that happen.  What signs should i look for if it is the valve seals, or does any one else know what it might be?  It smells like it's burning oil out the back.  All my fluids are clean, no mixing, and it seems to rattle a little at low rpm.  Any ideas/input would be great.  thanks! Jason