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Low Compression ? Help~!

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Old Jul 21, 2010 | 06:07 AM
  #11  
NIKE H34D's Avatar
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Dam used cars sorry to hear JayVee
 
Old Jul 21, 2010 | 08:34 AM
  #12  
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If I gave my car a oil change along with the restorer you mentioned trust, and new spark plugs/wires;
do you think I could increase my chances of a healthier running car?
 
Old Jul 21, 2010 | 09:23 AM
  #13  
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it might help, only one way to find out get it tested.
the reason i posted lucas is for a worn cyl it will help raise comp if rings are worn, and the reason i posted seafoam is there could be carbon build up on valve and not letting it seal correctly. you can only guess at the problem from outside the motor until you open it up.
oh an the stuff trust posted walmart carries it, ive used it before
 
Old Jul 21, 2010 | 08:48 PM
  #14  
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Ahh, I see. If i mixed all three of those together would that be bad?

I bought the restore 4cyl lubricant at walmart haha.
Yeah, i'm planning on giving my car an oil change tomorrow then using the 4cyl lubricant along with fresh new oil as well.
 
Old Jul 21, 2010 | 08:49 PM
  #15  
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Mixing them could possibly reduce their individual effectiveness.
 
Old Jul 21, 2010 | 10:07 PM
  #16  
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oh well, the reason asking is because i picked up some stp oil treatment stuff as well. I shouldn't see a big difference should it?
 
Old Jul 22, 2010 | 03:49 PM
  #17  
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Okay so the oil change along with the Restore for it made my car feel a bit nicer then how it was before.
The old oil looked ridiculously old (as if they hadn't done an oil change in a while)

Then finally i got my results for the test:

Cylinder 1: 120psi
Cylinder 2: 120psi
Cylinder 3: 60psi
Cylinder 4: 131psi

Any solutions?
 
Old Jul 22, 2010 | 05:51 PM
  #18  
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is that the new tests or the old one from before? the only real way is to take it apart and see whats causing the low compression. did you put the lucas in it?
 
Old Jul 22, 2010 | 05:57 PM
  #19  
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this was before i added the Restore 4cyl lubricant.

and the lucas / seafoam i didn't put yet.

is that substantially low of psi for a cylinder?
 
Old Jul 22, 2010 | 06:02 PM
  #20  
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The indicated compression pressures are considered normal if the lowest reading cylinder is within 75% of the highest.

Seventy-five percent of 131 is 98 , the highest cylinder reading is 131. Therefore, cylinder No. 3 being 60 which is less than 75% of cylinder No. 4 indicates an improperly seated valve or worn or broken piston rings.

If one, or more, cylinders read low, squirt approximately one (1) tablespoon of engine oil on top of the pistons in the low reading cylinders. Repeat compression pressure check on these cylinders.

1. If compression improves considerably, the piston rings are at fault.

2. If compression does not improve, valves are sticking or seating poorly.

3. If two adjacent cylinders indicate low compression pressures and squirting oil on the pistons does not increase the compression, the cause may be a cylinder head gasket leak between the cylinders. Engine oil and/or coolant in the cylinders could result from this problem.
 

Last edited by 94civichatchback; Jul 23, 2010 at 02:29 AM.



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