first off its a 95 ls motor. i ran 15psi and blew all ring lands, no problem. had new pistons and i threw them in that next day after i took the rods to the machine shop to get the new pistons pressed on. anywys, start the car back up and it fired right away. didnt burn any oil until a week later. now yesterday i checked and i was going though a litre of motor oil every 50km. DAMN. so i checked my compression. 160-160-160-170. so thats not to bad. while i was at it i checked the plugs. they all looked good for except for #4, which was all black. weird becuase that was 170psi. anyways, thought i might have put the rings back on wrong. so i just pulled the head and everything is fine. there is no blowby on the piston so it cant be burning oil from the bottom, so it must be a head problem. the pistons looked almost brand new! i pulled the rxhaust valves just now and they have alot of carbon build up and look really rank compared to the others so NOW it must be in the head. so what other things should i look for? im thinking that i must have bent a valve, how can i check? but remember the compression is at 170psi and i bent vavle would have low compression right? im going to replace the vlave seals, anything else i should look for? what are other possibilites?

 

if you are burning oil that bad, it is in the rings. compression numbers arent a be all end all way of diaging. do a cyl leakage test.

stupid question. did you just put the new pistons in the bore after you broke all the ringlands? were the old pistons stock? on the 2 engines that i have had experience with nuclear meltdown, one my own, there was piston material on the cylinder wall. and just throwing new rings and pistons at it will not fix it.

b.t.w. what compression ratio are you running?

 

did u hone it before u put the other pistons in??

are you sure its the same bore.. thats a shitload of oil your burning..

greetings from BC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedcivicsir &raquo;</TD></TR><TR><TD CLASS="quote">if you are burning oil that bad, it is in the rings. compression numbers arent a be all end all way of diaging. do a cyl leakage test.

stupid question. did you just put the new pistons in the bore after you broke all the ringlands? were the old pistons stock? on the 2 engines that i have had experience with nuclear meltdown, one my own, there was piston material on the cylinder wall. and just throwing new rings and pistons at it will not fix it.

b.t.w. what compression ratio are you running?</TD></TR></TABLE>


yes its just an integra ls motor with a thicker gasket making a compression ratio of 9:1. i had old used pistons that are the same in my basement that i threw on there. i used the old rings however (i might try new ones), but you will see on the walls of the pistons if there is blowby, meaning the oil is going past the rings. thre is definatly something wrong with valves on the 4th hole. ill take pics tommorow.

 

do u use a sandwich oil plate??? if you do...be sure that bitch is on there tight...cuz if not it will leak!

 

old rings? scored cylinder walls? blowby?

 

no blowby which i think means the oil is not leaking through. like i said earlier, you can see it on the side of the piston right?

 

have you tried valve seals? you might be burning oil because of that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LilCivic04 &raquo;</TD></TR><TR><TD CLASS="quote">have you tried valve seals? you might be burning oil because of that</TD></TR></TABLE>

yes that was my next guess. ill take pics of the valves today and then post them. then id like your feedback to see how they look. i know its not good but maybe somone can narrow down whats going on.

 

dude before all this started i would have done a cyl leakage test. i.m.o. i think you are chasing your tail.
good luch either way, but i think from the pistons having broken ring lands, there was piston material on the cylinderwall, and it took out the new rings.

there is only one or 2 things that could be causing this. and i severely doubt that a valve seal will cause a L every 50k consumption problem.

but again good luck either way, but i do think you are chasing your tail.

 

If your losing oil that fast, its either leaving a smoke trail behind you, or its leaking out somewhere. So, are you smoking? If so when, or are you making a mess in your engine bay somewhere.

 

take your block and head to a machine shop - have them mic the bores and check for roundness and irregularities, especially at the bottom of the bore where you might not see it. Also have him inspect your vavle guides - you should remove the springs and see if there is any side-to-side play in the valves.

If its a cool shop they probably wont even charge you for that.

 

yes its smoking i can see it. here is what the #4 exhaust vlaves look like.

good valve from cylinder 3


bad valve from 4 where the spark plug is all black


what would cause something like this to happen?

 

wow.....that valve looks like crap........how do the cylinder walls look? were new valve seals installed?

 

Looks like valveseals gave up.

 

so that looks like its from bad valve seals? walls are fine and im sure the rings are fine. when i blew the lands they just kinda cracked and came apart. i dont think anything happened to the rings.

 

does that valve wobble in the head?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">when i blew the lands they just kinda cracked and came apart. i dont think anything happened to the rings.</TD></TR></TABLE>
Wait a minute, you re-used the old rings? Didnt you ever learn that pistonrings ALWAYS need to be replaced if the piston is taken out of the cylinder, the old rings wont re-seal.

 

that and head gaskets, but who follows those rules?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flashmn &raquo;</TD></TR><TR><TD CLASS="quote">
Wait a minute, you re-used the old rings? Didnt you ever learn that pistonrings ALWAYS need to be replaced if the piston is taken out of the cylinder, the old rings wont re-seal.</TD></TR></TABLE>

i hope he didn't re-use the old piston rings

 

especially since he cracked the lands..

 

yeah i did use the old rings, they were almost new. i know your not supposed to but i dont really care about this motor. and yes i used the old headgasket. i had less that 1000k on both the rings and head gasket. but yes i am now going to put new rings in this timebut i dont think it will solve the problem. is this the valve stem seals that i need to replace?

 

1000k like in a million miles?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by commotion &raquo;</TD></TR><TR><TD CLASS="quote">1000k like in a million miles? </TD></TR></TABLE>

haha, thats good