tepco

Hello Im new to honda-tech, my brother recommended it to me because he has got great info for his accord here.

My question is my 1989 Civic HB D15b2 stick shift is smoking when i rev it or excellerate hard. its burning about 1/2 Qt every 200 miles (almost 1/2 to 100miles on the highway). It's leaking from the dist less then the normal amount.

Here is some engine info.

I just purchased it for a commuter, it was a one owner daily driver, it has 217k. i bought it with a seized cam. i replaced the head with a head off of a 1993 DX with between 100-150K, and had it milled and torqued to the TSB specs and all new gaskets, the cylinders still had cross hatch marks on them. ( i didnt talk to the owner so i dont know the full history of the engine)

New timing belt, water pump, plugs, PCV valve.

Starts and runs great and as strong as i would think a 1.5 could be.

Dry compression check showed, from dist. to timing belt:

180 185 170 180

The car appeared to be running for quite some time with a leaking head gasket. When i replaced the PCV valve i noticed a build up of carboned oil on the hose connecting the PCV valve, although air flowed through the line fairly easily.

I hate posts that lack info so i hope i listed enough.

Please let me know what else i could check or what else it may be.

Thanks,
Tim

slammedz6ef

its your rings

boostedcoupe99

it coudl just be your oil ring and your compression rings are still good.

tepco

Rings, even with good compression?

I was thinking more like the valve stem seals.

Any mech's out there?

ef9_b20

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tepco &raquo;</TD></TR><TR><TD CLASS="quote">Rings, even with good compression?

I was thinking more like the valve stem seals.

Any mech's out there?</TD></TR></TABLE>

yea i was about to say could be your seals

ricerodder91EX

almost definatly the seals over the rings. In my mind they are harder to get the oil to and if a car had an oiling issue they would be the first to be deprived of oil along with the valvetrain. I have the same problem as you and in addition my valvetrain is a little chattery.

Runnerdown

rings and old, out of round cyl walls. extremely common.

valve seals? LOL

ricerodder91EX

lol, hugh. well I don't know how much this applies to honda, but when my daytona used a quart every 400 miles I did the stem seals(common problem) and that fixed it.

bittles110

Bad valve stem seals usually show when starting up the engine after it has been sitting for a while.

I would look at the rings, as they will allow oil to be burned constantly during driving.

Out of round cylinder walls... hmmm. If the crosshatch is uniform around the entire bore, I think you can rule that out.

Replace the rings. All of them.

tepco

Well, ill try to get to the valve seals this weekend, they are cheap enough.

Ill keep you guys informed.

Sleepy-CRX

The eaziest way to find out wut makez da motor smoke iz if u deaccelerate & ur motor blowz blue smoke out da tail pipe then itz ur piston ringz! Compression really doesnt tell da condition of ur oil control rings on ur pistonz! The other tezt is to run ur motor until it iz @ normal temp then shut it off as if u were pumping gas then turn it back on!! If u blow blue smoke during a hot restart then itz ur valve stem sealz!! Truzt me i know Hondaz like da back of my hand!!

1kleenef

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sleepy-CRX &raquo;</TD></TR><TR><TD CLASS="quote">The eaziest way to find out wut makez da motor smoke iz if u deaccelerate & ur motor blowz blue smoke out da tail pipe then itz ur piston ringz! Compression really doesnt tell da condition of ur oil control rings on ur pistonz! The other tezt is to run ur motor until it iz @ normal temp then shut it off as if u were pumping gas then turn it back on!! If u blow blue smoke during a hot restart then itz ur valve stem sealz!! Truzt me i know Hondaz like da back of my hand!! </TD></TR></TABLE>
yea with those greatly spelled words who doesn't know hondas (hondas not HONDAZZZZZZZVTAKZZZZZZ!!!!!)

tepco

Ok i did a leak down test, and i think i see how it works.

I set my compressor to hold 100psi at the guage, hooked it up to the cylinder at TDC on the power stroke. And then opened the valve to pressurize the cylinder, the guage then read from left to right 96,96,95,96.

Now if I'm fully understanding this leak down test, that should mean 4-5% per cylinder?

Someone please correct me if I'm wrong.

innes887

sometimes if your rings are bad they compression will go up because oil is sealing them to the cylinder wall causing it to read normal compression. also check if you have alot of carbon build up on the head or the pistons, that also will cause the compression to go up

tepco

Thanks, the head is clean of any carbon build up. Anyone on the leak down test? I guess those numbers seem good.