88gmctruck
02GMCtruck
Problem: Truck is using about 1gallon of coolant in roughly 1,000 miles.
Demographics:
- Year: 1999
- Truck model and class: K2500, 8,600 GVWR
- Automatic or Standard: NV-4500
- Mileage: ~149,### miles
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc): Black Stanadyne PMD with #9 resistor install on 3/14/2011 after runaway at approx 146,500 miles. PMD is bolted to a 1/4" aluminum plate with a pentium 4 heatsink and fan mounted behind the driver's battery.
- Model: Turbo-charged L65 "F"
- Ambient outside temp: Varied from 20F-65F
- What fuel are you using? #2 Diesel
- What fuel additives are you using? White power service
- Where are you located?: Pullman, WA
General Maintenance:
- Air filter: Donaldson filter changed on 03/14/2011 @ 148,000 miles
- Fuel filter: Wix changed changed on 03/14/2011 @ 148,000 miles
- CDR Valve?: Cleaned and inspected 02/13/2011 @ 146,### miles
- Coolant – last flushed/replaced at: Unknown, uses approx 1 gallon of coolant per 1,000 miles. Coolant is orange, smells and looks normal. Cap holds pressure. No white smoke in exhaust. Upper radiator hose does not immediately get hard, takes about 8-10 mins. Previous owner had cooling system pressure tested and topped off though on 08/24/2007.
- Oil – synthetic/regular, changed at: Shell Rotella T 15w40 Conventional, changed on 03/14/2011 @ 148,000 miles
- Batteries – state of charge, (matched set) replaced at: Charged, matched Les Schwab 1,000/800 CA/CCA
- Battery cables and grounds (removed, cleaned and tightened): OEM, cleaned and tightened.
- Glow Plugs - how many miles on them?: Unknown What type? Delco G60. Individually tested & working
- Injectors - last changed at: Unknown
History:
- What were you doing when it happened?: Ongoing
- How was the truck running fine before this problem appeared?: Still running. Recently drove it across the state, 300 miles one direction, approx 200 miles around, and another 300 miles back.
- Has this problem ever happened before?: Yes.
- Describe any related factors that might be part of the problem: I thought the pass coolant blockoff plate was leaking, resealed it but it has not fixed the problem.
- Have you checked for DTC (Diagnostic Trouble Codes)?: No, the light is not on.
Diagnostics:
1] Starting:
1a] Does the engine start?: Yes.
1b] Does the engine crank over?: Yes.
1c] Are your batteries fully charged?: Yes.
1d] Have you removed, cleaned, and tightened all battery connections?: Yes.
1e] Does your Wait to Start light come on for a time?: Yes. How long?: 10 seconds depending on temp of truck.
1f] Does your glow plug light come on?: n/a For how long?: n/a
1g] Do you see smoke from the exhaust while cranking?: Right after startup, yes. What color?: Normal exhaust colored, lightly sooty, smells like burnt #2.
1h] Does the Service Engine Light Glow during Start/bulb check?: yes.
5] Running Issues
5a] On cold start, does upper rad hose get hard before engine warms up?: After 8-10 mins of running on high idle, yes. Takes longer at normal idle..
5b] Any bubbles or oil film in coolant overflow tank?: No.
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)?: No.
5d] Excessive white smoke from exhaust on cold start? When it's under ~32F there is white smoke on startup, appears as if it is normal condensation.
5e] Excessive black smoke from exhaust under hard acceleration? No.
6] Performance Issues
6a] Do you have gauges (boost, EGT)?: No.
6b] Maximum boost under load?: Unknown.
6c] Have you added a performance PCM (reflash) or Chip?: No.
6d] Have you changed exhaust / downpipe / crossover?: 3" Straight pipe.
6e] Wastegate – mechanical or vacuum (OEM)?: OEM
List and describe any other factors which are not addressed in this checklist. We can’t see, hear, smell, or touch your truck, so the more descriptive information you can give, the more likely it is that somebody can assist you.
Truck has used coolant since day 1 apparently. Uses around a gallon in 1,000 miles. I'm contemplating trying the GM sealant tabs in the upper rad hose and see if it clears the problem up.
There does not appear to be any leaks at the crossover, blockout plates, or heater fitting. The exhaust smells normal, coolant looks and smells normal, and oil looks and smells normal. Oil lever never changes. Upper Rad hose takes 8-10 mins to get hard, coolant cap holds pressure just fine.
Just wondering where all I should look for external leaks. I'm thinking i'd be seeing white smoke, oil or coolant mix, or a hard upper rad hose if it was a cracked head/block or head gasket. I will be digging into all areas soon and trying to pinpoint if it's an external leak or not. I have contemplated purchasing UV dye for it.
Demographics:
- Year: 1999
- Truck model and class: K2500, 8,600 GVWR
- Automatic or Standard: NV-4500
- Mileage: ~149,### miles
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc): Black Stanadyne PMD with #9 resistor install on 3/14/2011 after runaway at approx 146,500 miles. PMD is bolted to a 1/4" aluminum plate with a pentium 4 heatsink and fan mounted behind the driver's battery.
- Model: Turbo-charged L65 "F"
- Ambient outside temp: Varied from 20F-65F
- What fuel are you using? #2 Diesel
- What fuel additives are you using? White power service
- Where are you located?: Pullman, WA
General Maintenance:
- Air filter: Donaldson filter changed on 03/14/2011 @ 148,000 miles
- Fuel filter: Wix changed changed on 03/14/2011 @ 148,000 miles
- CDR Valve?: Cleaned and inspected 02/13/2011 @ 146,### miles
- Coolant – last flushed/replaced at: Unknown, uses approx 1 gallon of coolant per 1,000 miles. Coolant is orange, smells and looks normal. Cap holds pressure. No white smoke in exhaust. Upper radiator hose does not immediately get hard, takes about 8-10 mins. Previous owner had cooling system pressure tested and topped off though on 08/24/2007.
- Oil – synthetic/regular, changed at: Shell Rotella T 15w40 Conventional, changed on 03/14/2011 @ 148,000 miles
- Batteries – state of charge, (matched set) replaced at: Charged, matched Les Schwab 1,000/800 CA/CCA
- Battery cables and grounds (removed, cleaned and tightened): OEM, cleaned and tightened.
- Glow Plugs - how many miles on them?: Unknown What type? Delco G60. Individually tested & working
- Injectors - last changed at: Unknown
History:
- What were you doing when it happened?: Ongoing
- How was the truck running fine before this problem appeared?: Still running. Recently drove it across the state, 300 miles one direction, approx 200 miles around, and another 300 miles back.
- Has this problem ever happened before?: Yes.
- Describe any related factors that might be part of the problem: I thought the pass coolant blockoff plate was leaking, resealed it but it has not fixed the problem.
- Have you checked for DTC (Diagnostic Trouble Codes)?: No, the light is not on.
Diagnostics:
1] Starting:
1a] Does the engine start?: Yes.
1b] Does the engine crank over?: Yes.
1c] Are your batteries fully charged?: Yes.
1d] Have you removed, cleaned, and tightened all battery connections?: Yes.
1e] Does your Wait to Start light come on for a time?: Yes. How long?: 10 seconds depending on temp of truck.
1f] Does your glow plug light come on?: n/a For how long?: n/a
1g] Do you see smoke from the exhaust while cranking?: Right after startup, yes. What color?: Normal exhaust colored, lightly sooty, smells like burnt #2.
1h] Does the Service Engine Light Glow during Start/bulb check?: yes.
5] Running Issues
5a] On cold start, does upper rad hose get hard before engine warms up?: After 8-10 mins of running on high idle, yes. Takes longer at normal idle..
5b] Any bubbles or oil film in coolant overflow tank?: No.
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)?: No.
5d] Excessive white smoke from exhaust on cold start? When it's under ~32F there is white smoke on startup, appears as if it is normal condensation.
5e] Excessive black smoke from exhaust under hard acceleration? No.
6] Performance Issues
6a] Do you have gauges (boost, EGT)?: No.
6b] Maximum boost under load?: Unknown.
6c] Have you added a performance PCM (reflash) or Chip?: No.
6d] Have you changed exhaust / downpipe / crossover?: 3" Straight pipe.
6e] Wastegate – mechanical or vacuum (OEM)?: OEM
List and describe any other factors which are not addressed in this checklist. We can’t see, hear, smell, or touch your truck, so the more descriptive information you can give, the more likely it is that somebody can assist you.
Truck has used coolant since day 1 apparently. Uses around a gallon in 1,000 miles. I'm contemplating trying the GM sealant tabs in the upper rad hose and see if it clears the problem up.
There does not appear to be any leaks at the crossover, blockout plates, or heater fitting. The exhaust smells normal, coolant looks and smells normal, and oil looks and smells normal. Oil lever never changes. Upper Rad hose takes 8-10 mins to get hard, coolant cap holds pressure just fine.
Just wondering where all I should look for external leaks. I'm thinking i'd be seeing white smoke, oil or coolant mix, or a hard upper rad hose if it was a cracked head/block or head gasket. I will be digging into all areas soon and trying to pinpoint if it's an external leak or not. I have contemplated purchasing UV dye for it.
