88 2.3 compression.
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88 2.3 compression.
So today I ran a compression test on my 2.3l ranger and I was amazed at the results.
#1 cyl. was at 80 lbs.
#2 was struggling to get 50 lbs.
#3 was at 110 lbs easily.
and I didn't see a need to go further, the truck is in time, no strange noises etc so I'm thinking rings because it is starting to smoke pretty badly. Any ideas/suggestions? What is average compression on these motors? Any help is greatly appreciated.
#1 cyl. was at 80 lbs.
#2 was struggling to get 50 lbs.
#3 was at 110 lbs easily.
and I didn't see a need to go further, the truck is in time, no strange noises etc so I'm thinking rings because it is starting to smoke pretty badly. Any ideas/suggestions? What is average compression on these motors? Any help is greatly appreciated.
Laughing Gas
Joined: Aug 2003
Posts: 1,175
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From: So. Cal.
Note that the engine should be at normal operating temperature when do in the test. The lowest reading in the chart is 101.
Quoted from the 2004 shop manual:
Quoted from the 2004 shop manual:
Compression Test—Test Results
The indicated compression pressures are considered within specification if the lowest reading cylinder is at least 75 percent of the highest reading. Refer to the Compression Pressure Limit Chart.
If one or more cylinders reads low, squirt approximately one tablespoon of engine oil on top of the pistons in the low-reading cylinders. Repeat the compression pressure check on these cylinders.
Compression Test—Interpreting Compression Readings
1. If compression improves considerably, piston rings are faulty.
2. If compression does not improve, valves are sticking or seating incorrectly.
3. If two adjacent cylinders indicate low compression pressures and squirting oil on each piston does not increase compression, the head gasket may be leaking between cylinders. Engine oil or coolant in cylinders could result from this condition.
Use the Compression Pressure Limit Chart when checking cylinder compression so that the lowest reading is within 75 percent of the highest reading.
The indicated compression pressures are considered within specification if the lowest reading cylinder is at least 75 percent of the highest reading. Refer to the Compression Pressure Limit Chart.
If one or more cylinders reads low, squirt approximately one tablespoon of engine oil on top of the pistons in the low-reading cylinders. Repeat the compression pressure check on these cylinders.
Compression Test—Interpreting Compression Readings
1. If compression improves considerably, piston rings are faulty.
2. If compression does not improve, valves are sticking or seating incorrectly.
3. If two adjacent cylinders indicate low compression pressures and squirting oil on each piston does not increase compression, the head gasket may be leaking between cylinders. Engine oil or coolant in cylinders could result from this condition.
Use the Compression Pressure Limit Chart when checking cylinder compression so that the lowest reading is within 75 percent of the highest reading.
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