Ok I have a 92 Civic Si. It has a 95 GSR motor and trans with unknown miles. I have noticed that it has been using a lot of oil lately. For example I had the oil at the full mark before going to the track on Friday night and by sunday afternoon it was below the bottom mark on the dipstick. It appears to smoke under full throttle not when shifting (high vacuum situation) so I figured it was the rings. I bought a good compression tester and tested the compression per instructions. I checked the numbers against what I found by searching and factory manual. And they seemed pretty good. 205 205 203 201 I read that over 200 PSI is pretty good for a used GSR motor. Please help me I think it is rings, but based on compression test I am not so sure anymore. Please help, I am at a dead end.

 

valve seals

 

I thought of that, but:

1: Would it use that much oil?
2: I thought valve seals would pull oil under a high vacuum situation such as shifting, but I see blue/black smoke under full throttle which is a low vacuum situation.

I am not sure so thats why I am asking. I uses oil like no other.

 

bent valves possibly. do a leak down test.

 

Anymore opinions? Anybody had a similar problem?

Wouldn't bent valves be apparent when you are driving it. Or would it run just fine?

 

Over 200 PSI is too much for B Series. It sould be around 180 PSI or + or - 10 PSI. May be you might want to check your pistons surfaces, or do some clean up with top fuel cleaner from honda dealer. But if carbon build up are too much, the cleaner wouldn't do any good.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hpd_eg2 &raquo;</TD></TR><TR><TD CLASS="quote">Over 200 PSI is too much for B Series. It sould be around 180 PSI or + or - 10 PSI. May be you might want to check your pistons surfaces, or do some clean up with top fuel cleaner from honda dealer. But if carbon build up are too much, the cleaner wouldn't do any good. </TD></TR></TABLE>

a good condition JDM B18C or B16a will be over 200psi

 

So would valve seals cause it to burn oil under full throttle?

 

Bad Valve seals would cause it to burn oil anytime the valves are opening.

Do a Leakdown test and it will tell you all you need to know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMlyfestyle &raquo;</TD></TR><TR><TD CLASS="quote">Bad Valve seals would cause it to burn oil anytime the valves are opening.

Do a Leakdown test and it will tell you all you need to know.
</TD></TR></TABLE>

yup.

 

I guess I had better build a leak down tester then.

 

Compression test will do you no good with an oil burner, need to do leak down. The oil will actually sometimes give you a higher psi than the rest..Did mine today 170-oil burner 190 110 110...Doh i got a bad one, Auto wrecker is gonna pay to rebuild...But point is my oil burning cylinder is second highest compression...Now to tear apart and see why 2 are at 110.