GSR_hatch936

I just did a compression test in my gsr with some ctr pistons and the results is:

Piston one:
260 psi first time
265 psi second time

Piston two:
265 psi first time
265 psi second time

Piston three:
275 psi first time
280 psi second time

Piston four:
280 psi first time
280 psi second time

well i got good compression but the last two piston worry me... i read a fourm about doing a compression test and they said if they vary from +-20 its ok and mine came out to 15psi different from the other two... What u honda ppl think?

fixed the order of the pistons lol!


Modified by GSR_hatch936 at 10:05 PM 12/21/2007


Modified by GSR_hatch936 at 10:05 PM 12/21/2007

z6hatchboy

I think thats just fine, little strange how it goes down from cyl. 1, but i dont think its much to be worried about, if 50 off yes but 15 no.

GSR_hatch936

yea im just wondering cuz my car smokes like crazy in vtec!!! so i figured i need to see if my piston rings are worn and thats y i did a compression test... and piston one is by the dizzy right?

z6hatchboy

Piston 1 is at the drivers motor mount or cam gear. Does sound like you might want rings though .

GSR_hatch936

so had them backwards lol! yea i guess i need a tune or the gasket that goes around the valves..

here i got a vid of my car smokin in vtec... but the quilty sucks its with a camra phone sorry!

http://www.youtube.com/watch?v=fLkJA8sdh2A


Modified by GSR_hatch936 at 10:26 PM 12/21/2007

GSR_hatch936

bump... want to hear what other ppl think too.!

D16SohcVtec

What color of smoke do you see? Did you also do a leakdown? If not you should. Could be head gasket related, but that's just speculation.

GSR_hatch936

naa havent done a leakdown test dont really know how and if it was the head gasket it would over heat... what im wondering if its just in need of tune? but if i get more info and what stuff i need to buy i will do a leakdown test! asap!

GSR_hatch936

ohh and the color of the smoke i dont know i just see a cloud! lol! but i posted a vid up there and it shows the smoke but got to look hard bad quality!!

instrument

if you see a cloud you should be able to discern the color of the cloud.

D16SohcVtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSR_hatch936 &raquo;</TD></TR><TR><TD CLASS="quote">naa havent done a leakdown test dont really know how and if it was the head gasket it would over heat... what im wondering if its just in need of tune? but if i get more info and what stuff i need to buy i will do a leakdown test! asap!</TD></TR></TABLE>

It doesn't have to be overheating to have a bad gasket. Check under your oil cap to see if it's kinda milky. You can check the overflow tank for any milky discolor to the coolant. If you see a milkish color etc your gasket might be going bad where it's not sealing the oil correctly.

Here's what you need for a leakdown.

http://www.c-speedracing.com/h...n.php

GSR_hatch936

i know bout the head gasket going out but had that happen to one of my cars... im just sayin its not out... but other then that like the valves and rings not really sure.

z6hatchboy

well, white smoke = headgaset. Check out that color though.

GSR_hatch936

well on the back of my car its black.. and i have a white car...!

speedooo

why does everyone always jump on the headgasket bandwagon...they dont just go everyday.

GSR_hatch936

i dont know y they alway think its the head gasket but im pretty sure its the valves or rings.... but not sure! need more help. cuz still need to buy the leak down tester.!

z6hatchboy

now we know its black, i m thinking rings, valve seels, isnt that about the only way for oil to get in the comb. chamb.? Do you have to add oil every know and then?

GSR_hatch936

yes i do but its also because i got a bad leak!! lol i changed the valve cover gasket the oil pan gasket the rear main seal gasket and now im lost! but the oil seem to be leekin near the trany and motor??? i put like a quart every week or so!

z6hatchboy

Lol, i have the same leak between block and tranny, but im rebuilding so hopefully it gets fixed. I also had black smoke and added a quart every week, and my rings are deff. shot b/c of 200k miles, lol.

GSR_hatch936

ohh yea then prolly the ring huh! well expletive i guess imma start saving!

A_Rotary_Guy

Usually black smoke means you're running rich, blue is usually burning oil, and white is burning coolant or just condensation during the colder months. But if you do have black all over your back bumper and you're probably burning oil. Don't just go ruling that it's the rings now either. It's very likely it could be the valve stem seals too which is a much easier problem to fix than the piston rings. lol Also, those compression numbers seem a little high. Are you sure you're checking compression right? 280 would be pretty damn high compression. Most cars with good compression will test around 160-180 PSI. You're right though, 20 PSI is the maximum variance between cylinders. If you want to tell if it's your rings compression test the car, then put a few squirts of oil down each spark plug hole and compression test again. If the compression goes up a decent amount (usually 10 PSI or more) then the rings are a good possibility.

GSR_hatch936

yea i did the compression test right.. I got a b18c1 with ctr pistions. but yea i was thinking the valves seal might be out ill do some more stuff to see wats wrong with it like a leak down test.

-Gary-

Did you do the test at WOT?

GSR_hatch936

WOT? now wats that?

z6hatchboy

Serious or joking, lol. Wide open throttle.