well the problem is that whenever i rev pass 4500 i get a continuous stream of blue smoke.

ive done a compression test and the results are 195-200-197-198 which i think is pretty good.

so has anyone got any ideas what could be causing the smoke ?

 

maybe your valve seals or rings

 

maybe ur rings

 

i dont think his compression test would have been that good if its blowing by his rings. check the valve seals

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMlifestyle &raquo;</TD></TR><TR><TD CLASS="quote">i dont think his compression test would have been that good if its blowing by his rings. check the valve seals</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMlifestyle &raquo;</TD></TR><TR><TD CLASS="quote">i dont think his compression test would have been that good if its blowing by his rings. check the valve seals</TD></TR></TABLE>

CR tests are not always the best means of checking rings. Sometimes engines with bad rings will still have good CR readings.

Valvestem seals will usually cause smoke at idle.

Rings will cause blue smoke under throttle.

 

Are you sure it is blue and not black smoke?

fs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

CR tests are not always the best means of checking rings. Sometimes engines with bad rings will still have good CR readings.

Valvestem seals will usually cause smoke at idle.

Rings will cause blue smoke under throttle.</TD></TR></TABLE>

The compression test will verify your compression rings and not your oil rings. If your oil rings are finished, you'll be getting a lot of oil blow-by and the CR readings will look fine.

Get a leakdown test. It's more accurate to pinpoint oil consumption.

 

ok its looking like the rings have gone on my D16Z6, im already getting another ported head so instead of rebuilding my block is there another D series block i can use instead to give me higher compression ?