Are my rings gone?

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31-10-2005, 08:49 AM
revNhevN

Are my rings gone?

As some of you know i put my car on the dyno on saturday. Everytime adrain did a run and backed off, lots of white smoke came out the exhaust. The engine is from a b16a from an eg6.

Some people say its my rings or pistons that are gone.
How can i really determine if its the rings/ pistons?
Will a compression test tell me for sure?

I've had the car for a few months and have not done an oil change. But i know its been over 5000kms. Before i went on saturday i thought i would add a little more oil. When i got back on saturday i checked my oil level and it was just above the top marker ( a few mm).

Will overfilling oil cause alot of smoke on back off??
The top marker means the oil is full right?

I spoke to one of the mechanics at Hanny's and hes and its common to blow smoke and that it may be that the oil cannot handle the tempreature. He recomended changing the oil and seeing if that fixes the prolbem.

He said to use some honda oil or fully-synthetic elf that they just got in.
31-10-2005, 08:55 AM
bennjamin

yes overfilling will - since the excess oil is injected back into the inlet manifold from "blowby" (thru the PCV system)... Try changing your oil with Honda FEO or similar , and top up to only the top level or slightly below -
31-10-2005, 09:44 AM
**Ghost**

if ur rings are gone u would have lost compression. THis would have shown on the dyno dude, howm uch power did u make?
31-10-2005, 09:48 AM
revNhevN

91.8fwkw. stock b16a with full exahaust. stock intake.
31-10-2005, 10:01 AM
**Ghost**

that sounds right for about stock eg6... cos i think jdm b16a are 125kw at wheels... minus about 25-27% drivetrain loss ur motor is performing within original specs

if ur piston rings are indeed blown and engine oil is getting into the wrong places, and u have lowered compression, noway u'd be making this kinda figure

were u using a dyno dynamics dyno?
31-10-2005, 10:02 AM
revNhevN

yep dyno dynamics in shootout mode.
31-10-2005, 10:05 AM
**Ghost**

i'd say based on ur dyno figures there can be no way ur car has blwon piston rings. I could be wrong cos i aint no expert though.

But i have seen ppl with blown piston rings on b16As. The whole exhaust flutters and makes a "burping sound" like the turbo cars, and the car makes shitall power.

I would guess its cos u overfilled ur oil level. And yes i know u've checked the oil level, but are u doing this when the car is hot/cold/warm? it matters. I cant remember when ur meant to check ti tho :P.
31-10-2005, 10:08 AM
EGB16A

Quote:

Originally Posted by **Ghost**

that sounds right for about stock eg6... cos i think jdm b16a are 125kw at wheels... minus about 25-27% drivetrain loss ur motor is performing within original specs

if ur piston rings are indeed blown and engine oil is getting into the wrong places, and u have lowered compression, noway u'd be making this kinda figure

were u using a dyno dynamics dyno?

drive train loss occurs before power gets to the wheels.
31-10-2005, 10:16 AM
**Ghost**

Quote:

Originally Posted by EGB16A

drive train loss occurs before power gets to the wheels.

errr... wots ur point dude? sorry but thast a little captain obvious cos i know drivetrain loss occurs there. But neway, in case i confused anyone at all

Here was my reasoning

stock EG6 JDM b16A pulls 125kw OEM

presume 25% loss on a dyno dynamics dyno...

0.75 x 125 = 93.75kw

he is pulling 91kw at wheels, which is NEAR enough to OEM specs to presume nothing is majorly wrong with the engine.

so his car is performing within (near enough) to original engine specs for me to reason that his piston rings are not blown. if his piston rings were blown, there is no way he could generate enough compression to make 91kw at wheels.

thats y i asked him if he was using dyno dynamics, to see if my assumption of 25% loss could be applied to the scenario.
31-10-2005, 10:22 AM
EGB16A

Quote:

Originally Posted by **Ghost**

errr... wots ur point dude? sorry but thast a little captain obvious cos i know drivetrain loss occurs there. But neway, in case i confused anyone at all

Here was my reasoning

stock EG6 JDM b16A pulls 125kw OEM

presume 25% loss on a dyno dynamics dyno...

0.75 x 125 = 93.75kw

he is pulling 91kw at wheels, which is NEAR enough to OEM specs to presume nothing is majorly wrong with the engine.

so his car is performing within (near enough) to original engine specs for me to reason that his piston rings are not blown. if his piston rings were blown, there is no way he could generate enough compression to make 91kw at wheels.

thats y i asked him if he was using dyno dynamics, to see if my assumption of 25% loss could be applied to the scenario.

LOL... correct
31-10-2005, 11:27 AM
incoming

Quote:

Originally Posted by revNhevN

As some of you know i put my car on the dyno on saturday. Everytime adrain did a run and backed off, lots of white smoke came out the exhaust. The engine is from a b16a from an eg6.

Some people say its my rings or pistons that are gone.
How can i really determine if its the rings/ pistons?
Will a compression test tell me for sure?

I've had the car for a few months and have not done an oil change. But i know its been over 5000kms. Before i went on saturday i thought i would add a little more oil. When i got back on saturday i checked my oil level and it was just above the top marker ( a few mm).

Will overfilling oil cause alot of smoke on back off??
The top marker means the oil is full right?

I spoke to one of the mechanics at Hanny's and hes and its common to blow smoke and that it may be that the oil cannot handle the tempreature. He recomended changing the oil and seeing if that fixes the prolbem.

He said to use some honda oil or fully-synthetic elf that they just got in.

u had ur car dyno'd at TODA right?
my car has the same prob... they thought i might have blown piston rings too but after dyno result they reckoned its all good...

Q:
what happens when u drive down hill for a good amount of time say in a lower gear and when u get to the bottom and press the accel and it blows alot of smoke??... this has happened to me twice now....
i drive down hill alot though
31-10-2005, 12:11 PM
Ferrari

[QUOTE=**Ghost**]that sounds right for about stock eg6... cos i think jdm b16a are 125kw at wheels...
QUOTE]
it was just your wording ghost, JDM B16A make 125kw at the flywheel not the wheels
31-10-2005, 12:38 PM
bennjamin

guys reply only if u can help with the actual question.... This is to do with excess smoke coming from the exhaust.

Try what i mentioned earlier and make sure there is not excess oil in the sump - N/A - i think that might be normal blow-by gas as the engine was under load and at an angle too ?
31-10-2005, 04:28 PM
DjRob

my car does the same.. when i floor it smoke comes out the back.. but only when i hammer it..i was thinking the same thing...

a compression test can also tell if you ur piston rings are gone too yeah?
31-10-2005, 04:34 PM
bennjamin

Quote:

Originally Posted by DjRob

my car does the same.. when i floor it smoke comes out the back.. but only when i hammer it..i was thinking the same thing...

a compression test can also tell if you ur piston rings are gone too yeah?

usually abit of smoke blows at upper RPM's as excess fuel being burnt off from the ECU running rich- black in colour.... if its any other colour do reply.

A leak-down test is the more advanced way to determine whether rings are gone or other leaks elsewhere such as headgasket or shot valves etc..
31-10-2005, 05:34 PM
sivic

yeah, i'm swinging in same opinion. make sure your'e oil levels arent too high. does the smoke come out at WOT or just when it backs off? if only when backoff i would say its blowby. when the throttle shuts there is still a high vacuum at high RPM in the IM. this causes a lot more gas to come from the crankcase via the PCV than usual.
but do get a compression test/ leak down to be sure
31-10-2005, 05:37 PM
Weq

just compression test it and post the results. Could be valve guides or something.
31-10-2005, 06:30 PM
DjRob

my smoke its sorta blackish white....
more towards the black...

I was going to get my compression test done to see if my engines ok.
31-10-2005, 06:35 PM
bennjamin

Quote:

Originally Posted by DjRob

my smoke its sorta blackish white....
more towards the black...

I was going to get my compression test done to see if my engines ok.

revhaven + DjRob - do a compression test :)

Look - i did a DIY recently.....

DIY COMPRESSION TEST *click here*
31-10-2005, 09:41 PM
revNhevN

checked the oil level and its about 4-5 mm above the top marker. so its overfilled. probably got a little excited topping upt the oil before the dyno.

i will be changing the oil on saturday. probably 10w40 weight elf oil. to be safe i won't be driving the car till then. will probably take it back to hannys to do a compression test. i would do it myself but dont have the tool/gauge.

to see if the smoke has gone should i:
a) put it back on the dyno?
b) drive it and have a mate follow from behind?
16-03-2006, 03:37 PM
RMN15N

i reckon you should have it back on the dyno again