Ask Experts Questions for FREE Help !
Ask
    jon27405's Avatar
    jon27405 Posts: 6, Reputation: 1
    New Member
    		  
    #1

    Jul 24, 2008, 04:19 PM
    Compression test interpretation needed
    I was the guy with the honda civic that wouldn't start. I did a compression test with both a wet and dry situation.

    Dry:
    Cylinder

    1. 150 units of pressure
    2. 140 units of pressure
    3. 140 units of pressure
    4. 55 units of pressure


    After this I added some engine restore to each piston via the spark plug tube. After about 2 minutes, I conducted a wet test

    1. 115 units of pressure
    2. 170 units of pressure
    3. 100 units of pressure
    4. 180 units of pressure

    These cylinders changed pressure so much that I really need an explanation on these. Please help
    rhadsen's Avatar
    rhadsen Posts: 36, Reputation: 7
    Junior Member
    		  
    #2

    Jul 25, 2008, 06:20 AM
    Looks like cylinder #4 has bad rings. How did the plug look in that cylinder? What made you decide to do a compression test - oil consumption?

    Rob
    jon27405's Avatar
    jon27405 Posts: 6, Reputation: 1
    New Member
    		  
    #3

    Jul 25, 2008, 07:56 AM
    My plugs in cylinder 4 were burned completely black and smelled of gas. The plugs were absolutely brand new, I just took them out of the box. Lol. I was thinking that I seated a ring. But I was hoping that the oil I poured on top of it during the wet test would bring the ring back up. I will test the compression again today to see if the engine restore has worked its way down the cylinder walls and done its job.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #4

    Jul 25, 2008, 08:11 AM
    Classic ring problem on Cylinder #4. Most likely, you are facing a rebuild. Afterwards, use full-synthetic engine oil (e.g. Mobil 1 5W-30); then, it's unlikely you'll ever wear an engine out and have these problems again.
    jon27405's Avatar
    jon27405 Posts: 6, Reputation: 1
    New Member
    		  
    #5

    Jul 25, 2008, 05:20 PM
    I checked my compression again today, hoping that after a full 24hrs that the compression would improve but here are the results

    1. 150
    2. 185
    3. 130
    4. 210!!

    These numbers are below the recommended compression and waaaayyyy about the varience margin the repair manual gives me. Would this keep a car from starting?
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

I need a dream interpretation [ 9 Answers ]

I had a dream where I was sitting in this room and there are people beside me but I don't remember there faces. I see a door open and I ask the person beside me "whats in there". Then I am walking into this room, and someone comes in after me and shuts the door. Now it is like I am on the ceiling...

Dream Interpretation [ 3 Answers ]

I've been having the same type of dream repeatedly for weeks. My husband is never in any of my dreams. I'm always in a crowd, sometimes @ a party or event, yet I do not know anyone & not sitting w/ anyone. What does this mean? Why isn't my husband or friends in any of my dreams?

Interpretation of dream needed ! [ 5 Answers ]

In my dream, I went to a neighbour's house. In front of the house, I took up two pieces Of stone and rubbed against each other. Suddenly an image of Buddhisattwa appeared in The sky ,The image was very huge, occcupied about a quarter of the sky. What is the meaning ? Can anyone help me...

Compression test (Civic 91 DX) [ 2 Answers ]

What can cause a compression test to show low compression on any cylinder? About half a year ago I went to check the compression at a local Honda Dealer, and they said 3 cylinders were OK and one was very bad. They said they poured some oil inside each cylinder and I got results of about 11:1 on...

View more questions Search