I did a compression test today to check out the health of my car for potential future turbocharging. I pulled the spark plugs out one at a time (fuel injectors and fuse were left in, oops) and then cranked the engine for about 3 seconds per cylinder. I'd say the engine cranked somewhere between 8-14 times per reading. It is a 1995 Integra LS with 149,500 miles and I did the compression test right after changing the oil and filter. The readings were:

135-140-136-125

Isn't that bad? I have a spare B18B1 sitting in my garage that got readings of 195-200-195-200. That seems a lot better.

Ben

 

the 4th cylinder reading is the one I would be worried about, take the head off and inspect the gasket... replace it if necessary and torque it down properly
if that doesnt work then check your valve clearance, or maybe check your spark plug thread wrings
actually check valve clearance first... lil easier

 

Why are they all so low together though? Like I said I've got another engine here hovering around 200 psi... why is mine hovering around 135 psi? The extra miles? Is there that much variance from the factory? Oy.

Ben

 

yeah ur right its very low, but checking on that one might reveal something
I really have no clue why they would all be ~60 psi lower than average, and I dont think high miles would do that naturally

 

Is it worth a visit to the mechanic, or will my Honda-Tech Ball of Truth reveal the answer in due time?

Ben

 

mmm... the honda tech ball of truth gets you ppl like me just lookin for thinkin material... but give it time someone will have a definite answer, always wait before u $$$$$$

 

I would actually check the vales, that can make contribute to loss of compression.

 

Oy... valve adjustment, compression re-test, leakdown test, Comin Up!

Ben

 

that will help.