February 5, 200719 yr 3: 180 4: 160 1: 170 2: 180 157k mi, 85 GL wagon EA82 carbed. [/url] 10 % of 180 is 18, so that puts your lowest number 162. All in all, I would say that your numbers are fine, especially for that mileage. 170-180 is considered compression for a new engine. I was trying to find you a nice chart on the net, but man ive seen sites saying anywhere from 5% to 25 % is ok. http://www.motorage.com/motorage/article/articleDetail.jsp?id=16170 i wouldnt worry about 2psi differnce, as that can be human error in the way its done. you have a realtivly solid engine. nipper
February 5, 200719 yr I just re-sealed my engine. While I had it apart I noticed that my 207,000+ mile engine had a TON of carbon on the pistons. To the point that I am sure that it is messing with the compression. Notice the different colored spark plugs? Picture of the cylinder head for 1 & 3 Picture of the cylinder head for 2 & 4 Picture of the cylinder pistons 1 & 3 Picture of the cylinder pistons 2 & 4 My solution? Seafoam the engine. The car is still currently apart. But, I doubt that I will be taking the car apart to see if it worked. Many here trust this stuff. Seafoam just might help even out the numbers. Specifically, lower the highest numbers.
February 6, 200719 yr Never mind the spark plugs.The colour of the exhaust valves is a better indicator of compression.In general,the lighter the colour,the higher the compression.Normal is sorta light tan.The dark valve indicates low compression/oil consumption.
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