02 lb7 180k miles. Hand full of bolt ons. Ive had indications of injectors going bad. Started with light smoke out the tail pipe. About to get new injectors and indications shift to other issues. Once th engine is warm it get a ton of smoke pouring out of everywhere to include excess from tail pipe. Verified if it was head gasket, not using coolant, after letting the truck sit overnight night after at op temp, the upper radiator hose is Not firm. Pulled all glow plugs ran a compression test, the pressure was 400+-20. All built pressure in similar fashions and no cyl had notable differences from the other except #8. The glow plug had a bit of oil on the shaft but not on the tip and had No excess carbon build up over the others. But while running the compression test cyl 8 would puff out a bit of the glow plug hole. I'm not, nor do I claim to be a diesel mechanic, I am at the length of my trail of testing and I'm not sure to which path i should now pursue to track this issue down. Any ideas or suggestions would be greatly appreciated. (I live in Virginia Beach. If anyone knows of a place that's worth a damn I cold take it to as a last resort. That is also welcome). Thank you
LB7: Smoke (huffing) from crank case vent tube, filler cap and dip stick. A lot of it
- Thread starter 02maxstang
- Start date
Brent- it doesn't have a notable amount of smoke if any once cold.
Balance rates as follows
680 rpm
173 ect
While in
park___ Neutral____in gear
1 1.7__1.8___1.3
2 -0.6__-1.4____-0.5
3 -2.1__2.1___-2.1
4 0.3.__ -0.2___-0.2
5 1.6.__1.8____0.8
6 0.4.__0.4___1.1
7 0.8.__ 1.6____1.6
8 -2.2.__ -2.4___-2.4
Thanks for the input thus far. Any further data would be greatly appreciated.
Balance rates as follows
680 rpm
173 ect
While in
park___ Neutral____in gear
1 1.7__1.8___1.3
2 -0.6__-1.4____-0.5
3 -2.1__2.1___-2.1
4 0.3.__ -0.2___-0.2
5 1.6.__1.8____0.8
6 0.4.__0.4___1.1
7 0.8.__ 1.6____1.6
8 -2.2.__ -2.4___-2.4
Thanks for the input thus far. Any further data would be greatly appreciated.
Last edited:
Your Vehicle: 2002 Chevy Truck K 2500 Truck 4WD V8-6.6L DSL Turbo VIN 1
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Vehicle » Engine, Cooling and Exhaust » Engine » Compression Check » Testing and Inspection
Testing and Inspection
Engine Compression Test
Tools Required
EN-48694 Compression Gauge Adapter
J 26999 Compression Gauge
J 43244 Relay Puller Pliers
Ensure that the vehicle's batteries are in good condition, and fully charged.
Operate the vehicle until the engine is at normal operating temperature.
Shut off engine.
Disable fuel delivery system, by removing the EDU/IGN 1 relay with J 43244.
Disconnect glow plug electrical connectors; remove all 8 glow plugs. All 8 glow plugs must be removed from the engine during each cylinder test to obtain valid test results.
Prior to taking a compression reading, verify the cranking speed is greater than 140 RPM. If the cranking speed is below 140 RPM, repair the slow cranking speed condition before continuing with the compression test. See: Starting and Charging\Testing and Inspection\Symptom Related Diagnostic Procedures\Engine Cranks Slowly
Install the EN-48694 in the glow plug hole for the cylinder that is being checked.
Notice: Do not add oil to any cylinder during a compression test as extensive engine damage may result.
Connect the J 26999 to the EN-48694.
Using the vehicle's starter motor, rotate or crank the engine for 6 compression strokes, puffs, for the cylinder being tested.
Observe the J 26999 and note the reading as the compression test is being performed. A normal cylinder reading will be indicated if compression builds up quickly and evenly to the specified level. An abnormal reading will be indicated if compression is low on the first compression stroke, starts increasing on the following compression strokes but does not reach the specified level.
Record the compression reading for the cylinder just tested.
Disconnect the J 26999 from the EN-48694 and remove adapter from the glow plug hole.
Repeat steps 8 through 13 for all remaining cylinders. All 8 cylinders must be tested to obtain valid test results. Record the readings.
The minimum compression in any one cylinder is 2069 kPa (300 psi). There should not be more than 345 kPa (50 psi) difference between a suspect cylinder and the average compression of all 8 cylinders.
Normal - Compression builds up quickly and evenly to the specified compression for each cylinder.
Piston Rings Leaking - Compression is low on the first stroke. Compression builds up with the following strokes but does not reach normal.
Valves Leaking - Compression is low on the first stroke. Compression usually does not build up on the following strokes.
I used the harbor freight compression tester and it worked just fine.
Click Here
Vehicle » Engine, Cooling and Exhaust » Engine » Compression Check » Testing and Inspection
Testing and Inspection
Engine Compression Test
Tools Required
EN-48694 Compression Gauge Adapter
J 26999 Compression Gauge
J 43244 Relay Puller Pliers
Ensure that the vehicle's batteries are in good condition, and fully charged.
Operate the vehicle until the engine is at normal operating temperature.
Shut off engine.
Disable fuel delivery system, by removing the EDU/IGN 1 relay with J 43244.
Disconnect glow plug electrical connectors; remove all 8 glow plugs. All 8 glow plugs must be removed from the engine during each cylinder test to obtain valid test results.
Prior to taking a compression reading, verify the cranking speed is greater than 140 RPM. If the cranking speed is below 140 RPM, repair the slow cranking speed condition before continuing with the compression test. See: Starting and Charging\Testing and Inspection\Symptom Related Diagnostic Procedures\Engine Cranks Slowly
Install the EN-48694 in the glow plug hole for the cylinder that is being checked.
Notice: Do not add oil to any cylinder during a compression test as extensive engine damage may result.
Connect the J 26999 to the EN-48694.
Using the vehicle's starter motor, rotate or crank the engine for 6 compression strokes, puffs, for the cylinder being tested.
Observe the J 26999 and note the reading as the compression test is being performed. A normal cylinder reading will be indicated if compression builds up quickly and evenly to the specified level. An abnormal reading will be indicated if compression is low on the first compression stroke, starts increasing on the following compression strokes but does not reach the specified level.
Record the compression reading for the cylinder just tested.
Disconnect the J 26999 from the EN-48694 and remove adapter from the glow plug hole.
Repeat steps 8 through 13 for all remaining cylinders. All 8 cylinders must be tested to obtain valid test results. Record the readings.
The minimum compression in any one cylinder is 2069 kPa (300 psi). There should not be more than 345 kPa (50 psi) difference between a suspect cylinder and the average compression of all 8 cylinders.
Normal - Compression builds up quickly and evenly to the specified compression for each cylinder.
Piston Rings Leaking - Compression is low on the first stroke. Compression builds up with the following strokes but does not reach normal.
Valves Leaking - Compression is low on the first stroke. Compression usually does not build up on the following strokes.
I used the harbor freight compression tester and it worked just fine.
Last edited:
How does your oil look , feel and smell , is it higher on dipstick than usual this is important not my usual joking .
If it doesn't smoke a lot if any when its cold and starts smoking when the truck gets to operating temp your looking at injectors most likely.