** How To - Leakdown Test ** - Honda-Tech - Honda Forum Discussion


Acura Integra All Integra Except ITR

** How To - Leakdown Test **

Reply
 
 
 
Thread Tools Search this Thread
Old 01-12-2006, 12:52 PM   #1
Honda-Tech Member
Thread Starter
 
wildoutwhitegsr's Avatar
 
Join Date: Dec 2005
Location: Whitby, Ontario, Canada
Posts: 360
Default ** How-To/DIY ** - Leakdown Test

What is a leakdown test? Well a leak down test determines exactly how much compression your losing and from which cylinder, as well as the cause of it. More on that later. This test along with a compression test will determine the health of your motor.


Tools Needed:
Compressor
5/8” Spark Plug Socket
10mm
19mm
Rachet
6” Extension
Leakdown Tester


1) First things first, find a place to work on your car.

2) Proceed to plug in your compressor and set it up with the hose attached and pressure regulated between 60psi and 100psi. I choose 100psi.



3) Plug the gauge half of the leakdown tester into the compressor and then turn the adjustment **** so that it reads 0Psi.



4) Remove the cover on the underhood fusebox. Should look like this.



5) Locate the 15A fuse in the upper lefthand corner and remove it. This prevents fuel from being squirted into the engine when manually cranking it over to TDC for each cylinder.



6) Proceed to the car and remove your valve cover.



Place all the bolts and valve cover gromets in a safe place. For me it's in the spark plug cover.



7) Then remove each spark plug like so.





Once all the spark plugs are removed, place them in a safe place.



This is also a good time to check them to see what condition there in.



8) Once each spark plug is removed, you then set cylinder 1 to TDC (Top Dead Center). You accomplish this by manually turning over the engine with the 19mm socket and extention on the rachet. Proceed to turn the engine counter-clockwise until your cam gears reach TDC for cylinder one.



9) Proceed to screw in the hose of the leakdown tester into cylinder 1



10) Attach the other half of the leakdown tester (gauge) to the hose in the spark plug hole, cylinder 1 and read the percentage of air that is leaking out of the cylinder.



1-10% leakage is normal. OEM Honda Specs. No engine is 100% leak free even when brand new. If the gauge reads above 10%. Listen to where the air is escaping from. The bigger the amount of leakage the harder it is to hear. Think of blowing thru a huge pipe with you mouth compared to a straw.

Air leakage Table:
Leaking out the exhaust = Exhaust Valve
Leaking into the intake/throttle plate = Intake Valve
Air bubbles in the top of the radiator(take off the rad cap) or into the adjacent cylinder = headgasket
Oil cap, Dipstick, Bottem end = Piston Rings

Remember that 1-10% is normal so you will still hear some air leaking out in general. Just more than 10% isn't normal or within Honda specs.

11) Repeat steps 8-10 for the remaining 3 cylinders and record them on a piece of paper.

12) Put everything back together. Install is the same as removal. Just follow the steps in reverse.

Good luck





Modified by wildoutwhitegsr at 9:45 AM 1/13/2006
wildoutwhitegsr is offline   Reply With Quote
Old 01-12-2006, 01:11 PM   #2
I serve phở for my babies
iTrader: (2)
 
ohsnapzafingcu's Avatar
 
Join Date: Jun 2005
Location: OKC, OK, USA
Posts: 3,820
Default Re: ** How To - Leakdown Test ** (wildoutwhitegsr)

sweet nicely done
ohsnapzafingcu is offline   Reply With Quote
Old 01-12-2006, 01:58 PM   #3
Member
 
BrooX's Avatar
 
Join Date: Aug 2005
Location: Cen Cal..., USA
Posts: 1,424
Default Re: ** How To - Leakdown Test ** (wildoutwhitegsr)

Nice write up.
*saved to notepad*
BrooX is offline   Reply With Quote
Old 01-12-2006, 02:20 PM   #4
Honda-Tech Member
 
Join Date: Aug 2004
Location: UT
Posts: 3,388
Default Re: ** How To - Leakdown Test ** (DA9GUY-637)

saved to my computer!
LoseRPunKx182 is offline   Reply With Quote
Old 01-12-2006, 02:32 PM   #5
 
DC_RaceR's Avatar
 
Join Date: Oct 2005
Location: Hook em
Posts: 589
Default Re: ** How To - Leakdown Test ** (LoseRPunKx182)

Very nice write.. But I can't seem to find the fuse on my block head?
DC_RaceR is offline   Reply With Quote
Old 01-12-2006, 02:42 PM   #6
Honda-Tech Member
 
DoctorGSR's Avatar
 
Join Date: Aug 2002
Location: Monroe, CT, Land of the Free
Posts: 2,565
Default

whyd u even take the valve cover off?
DoctorGSR is offline   Reply With Quote
Old 01-12-2006, 03:42 PM   #7
 
RE- v8killa121's Avatar
 
Join Date: Dec 2005
Location: weco, cali, usa
Posts: 122
Default Re: (DoctorGSR)

Quote:
Originally Posted by DoctorGSR
whyd u even take the valve cover off?
That's what i was thinkin...
why?
RE- v8killa121 is offline   Reply With Quote
Old 01-12-2006, 03:51 PM   #8
 
Join Date: Dec 2005
Location: Lion Plaza, San Jose, CA, USA
Posts: 995
Default Re: (RE- v8killa121)

Quote:
Originally Posted by RE- v8killa121

That's what i was thinkin...
why?
to make it look more cooler, duh
ZipTieGUy is offline   Reply With Quote
Old 01-12-2006, 03:55 PM   #9
Honda-Tech Member
Thread Starter
 
wildoutwhitegsr's Avatar
 
Join Date: Dec 2005
Location: Whitby, Ontario, Canada
Posts: 360
Default Re: (DoctorGSR)

Quote:
Originally Posted by DoctorGSR
whyd u even take the valve cover off?
I know you don't have to, but for me personally I feel more confident in making sure I'm at TDC when looking at the cam gears instead of taking off the distributor cap and looking at the rotor.


Just a personally preference for me.
wildoutwhitegsr is offline   Reply With Quote
Old 01-12-2006, 05:40 PM   #10
Honda-Tech Member
 
Join Date: Jun 2002
Location: nc
Posts: 3,356
Default Re: ** How To - Leakdown Test ** (wildoutwhitegsr)

nice write up..
CNSK is offline   Reply With Quote
Old 01-12-2006, 08:34 PM   #11
 
Join Date: Apr 2004
Location: Placentia, CA, US
Posts: 821
Default Re: ** How To - Leakdown Test ** (CNSK)

volcom40street is offline   Reply With Quote
Old 07-28-2009, 05:59 PM   #12
Junior Member
 
jonnybadboi9's Avatar
 
Join Date: Jan 2007
Location: IL, U.S.
Posts: 132
Default Re: (DoctorGSR)

Quote:
Originally Posted by wildoutwhitegsr View Post
Quote:
Originally Posted by DoctorGSR
whyd u even take the valve cover off?
I know you don't have to, but for me personally I feel more confident in making sure I'm at TDC when looking at the cam gears instead of taking off the distributor cap and looking at the rotor.


Just a personally preference for me.
Yup, im with this guy as well when it comes to the valve cover...
Its A LOT EASIER with the valve cover off so you can look at the markings on the cam gears to make sure you are at TDC.

You turn the crank pulley.. which turns the belt... which turns the gears and you match up the markings to be at TDC for EACH cylinder when doing the Leak Down test.

Good writeup btw
jonnybadboi9 is offline   Reply With Quote
Old 07-29-2009, 04:55 AM   #13
Junior Member
 
em1si's Avatar
 
Join Date: Nov 2006
Location: Tampa, FL, USA
Posts: 79
Default Re: ** How To - Leakdown Test **

i must be the only one who just puts a long 3/8" extension in the spark plug hole and rotates the crank till it i watch it hit TDC....i've been doin that for years...easier than takin off a VC or even takin ur dizzy apart..just my .02
em1si is offline   Reply With Quote
Old 09-07-2010, 01:19 PM   #14
Honda-Tech Member
iTrader: (1)
 
7rrivera7's Avatar
 
Join Date: Aug 2002
Location: Comerio, PR, USA
Posts: 1,917
Default Re: ** How To - Leakdown Test **

How do you guys keep the rotating assembly from moving when you apply air pressure?
7rrivera7 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
*** How-To*** Clean Your FITV aka Fast Idle Thermo Valve wildoutwhitegsr Acura Integra 339 09-13-2017 05:57 PM
***How-To Clean*** Your IACV a.k.a. Idle Air Control Valve wildoutwhitegsr Acura Integra 407 12-27-2016 06:00 PM
***How-To*** Check & Clean Your Rear ABS Wheel Sensor wildoutwhitegsr Acura Integra 10 09-02-2016 04:33 PM
***How-To*** Install Valve Springs & Valve Stem Seals wildoutwhitegsr Acura Integra 165 05-05-2016 06:41 AM
WTB - 95 GSR idle control valve Cynical 1 Want to Buy 5 07-25-2011 11:31 AM


Tags
check, compression, cylinder, engine, honda, kit, leak, leakdown, piston, read, ring, test, tester, testing, valve

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 09:20 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: