compression - S2KI Honda S2000 Forums

Australia & New Zealand S2000 Owners Members from the land downunder.



Old 06-18-2016, 06:36 PM
Registered User
Thread Starter
Join Date: Oct 2011
Posts: 69
Thanks: 0
Thanked 0 Times in 0 Posts
Default compression

Hey guys, decided to do a compression test today so bought myself a cheap tester from autobarn (sptools brand) and proceeded to test compression.

Followed countless diys, engine was warm, fuel pump fuse removed and done at wot.

My results were very alarming!
#1: 165, #2: 165, #3: 165, #4: 170.

The numbers are waaay lower than what i was expecting and now worried I'll be needing a new engine

Car seems to run fine, haven't had any issues apart from the following -
Engine ticks, pretty sure they are noisy injectors and from watching yotube vids and reading forums, the noise seems normal for s2ks.

Burns a little oil - it's an ap1 with 135k km.

Temp guage takes ages to go up to 3 bars and sometimes it drops from 3 back down to 2. thinking maybe it's a thermostat?

Any advice? Engines cost soooo much and i cant imagine how much labour costs would be.
esafaeian is offline  
Reply With Quote
Old 06-18-2016, 09:27 PM
Registered User
Thread Starter
Join Date: Oct 2011
Posts: 69
Thanks: 0
Thanked 0 Times in 0 Posts

Ok so bought a more expensive tester and performed the tes while the car battery was hooked up to a running car and i got the following numbers -
1: 211,2: 215, 3: 211, 4: 210.

much better and i repeated it with the cheap tester and got similar nunbers to the original test so putting it down to a cheaper quality tester not being accurate.
esafaeian is offline  
Reply With Quote
Old 06-20-2016, 11:24 PM
AusS2000's Avatar
Join Date: Oct 2000
Location: Sydney
Posts: 30,785
Thanks: 0
Thanked 1 Time in 1 Post

No need to worry. It's not high numbers you need, but consistency.

If you have an issue you will see variance, regardless of the quality of the tester.
AusS2000 is offline  
Reply With Quote
Old 06-23-2016, 10:27 PM
Join Date: Aug 2010
Posts: 202
Thanks: 0
Thanked 2 Times in 2 Posts

True. Your numbers look fine.

Did you opened the trottle by hand or foot while testing? It will give a little bit more.
Also car battery and starter needs to be in good condition.

If one of the cilinders shows a low compression compared to the others, you can put in some oil in the cilinder and test again.
The oil will seal the piston rings for an amount of time, and can give a higher number, which means worn piston rings.
If the number is the same, and still low, it will mean worn valves or valve guides.
Delta_lima is offline  
Reply With Quote

Related Topics
Thread Starter
Last Post
S2000 Under The Hood
08-03-2017 05:32 PM
S2000 Under The Hood
07-01-2017 05:01 PM
S2000 Under The Hood
02-14-2017 02:16 PM
Texas - Houston S2000 Owners
02-24-2016 09:52 PM
S2000 Under The Hood
02-19-2016 05:27 AM

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 04:56 AM.

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