88gmctruck
02GMCtruck
Problem: Truck is using about 1gallon of coolant in roughly 1,000 miles. Now my oil has some thick sludge chunks in it. *pictures at end*
Demographics:
- Year: 1999
- Truck model and class: K2500, 8,600 GVWR
- Automatic or Standard: NV-4500
- Mileage: ~151,1## 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: ~65F
- What fuel are you using? #2 Diesel
- What fuel additives are you using? Silver power service
- Where are you located?: Pullman, WA
General Maintenance:
- Air filter: Wix 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 05/29/2011 @ 151,1## miles
- Coolant – last flushed/replaced at: Unknown, uses approx 1 gallon of coolant per 1,000 - 1,500 miles. Coolant is orange, smells and looks normal. Cap holds pressure. No bubbles in the tank. No white smoke in exhaust. Upper radiator hose does not immediately get hard, takes about 8-10 mins. Put UV dye in coolant and pressure tested 4/8/11. Truck while cold held pressure for over an hour after finding lower radiator hose loose at waterpump. Visually inspected again 5/29/2011 and cannot see any leaks or UV dye.
- Oil – synthetic/regular, Last change: Shell Rotella T 15w40 Conventional & Donaldson Filter, changed on 03/14/2011 @ 148,000 miles. Changed today 5/29/2011 with the same at 151,1## miles. Oil was at proper level, however had thick sludge like "globs" on the old filter and at the end of the oil draining process. Oil is black, there is not milky substance anywhere.
- 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.
- Has this problem ever happened before?: Yes to coolant, no to sludge.
- Describe any related factors that might be part of the problem: Beginning to think headgasket or cracked head.
- 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 - 1,500 miles. I did already try the GM sealant tabs in the upper rad hose and it appears to have done nothing. Currently there does not appear to be any leaks at the crossover, blockout plates, freeze plugs, waterpump, heater fitting or any hose. Upper Rad hose takes 8-10 mins to get hard, coolant cap holds pressure just fine. The exhaust smells normal, coolant looks and smells normal, but the oil is some sludge build up. Oil level never changes. Oil pressure has been around 25 PSI idle, 45PSI otherwise, once at operating temperature since I've owned it.
Have only owned the truck for 5,000 miles. First oil change at 148k appeared normal, however was immediately after PMD runaway incident. Between these two oil changes there haven't been any issues aside from the mystery coolant loss. 2 weeks ago drove it approx 500 miles over a weekend, no issues there. With the exception of 1 short trip (approx 100 miles) all have been without the trailer.
I'm beginning to think this is a headgasket problem or cracked head. I do not think i'm getting anything into the combustion chamber since the coolant tank is acting normal, however i think the coolant once up to operating temp is pressurizing and finding it's way into the oil, and as a result i have a slight sludge build up. Here are pictures of the filter.
I'm debating on filling it with new oil & filter, give it a few days and then re-drain the oil, and see if the sludge re-appears. Is it possible this is a result of the PMD runaway I had where they truck overfueled itself? I changed the oil shortly after that incident, and it has been 3,000 miles since. I plan to send the old oil to blackstone for analysis. If it is coolant in the oil, I know that is BAD for bearings, luckily it's a minute amount that has been making it's way in since the oil level is constant and is still black and oily.
Any other place oil and coolant could mix together aside from the heads, that is somewhere that is a common area. Any way the waterpump could?
Demographics:
- Year: 1999
- Truck model and class: K2500, 8,600 GVWR
- Automatic or Standard: NV-4500
- Mileage: ~151,1## 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: ~65F
- What fuel are you using? #2 Diesel
- What fuel additives are you using? Silver power service
- Where are you located?: Pullman, WA
General Maintenance:
- Air filter: Wix 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 05/29/2011 @ 151,1## miles
- Coolant – last flushed/replaced at: Unknown, uses approx 1 gallon of coolant per 1,000 - 1,500 miles. Coolant is orange, smells and looks normal. Cap holds pressure. No bubbles in the tank. No white smoke in exhaust. Upper radiator hose does not immediately get hard, takes about 8-10 mins. Put UV dye in coolant and pressure tested 4/8/11. Truck while cold held pressure for over an hour after finding lower radiator hose loose at waterpump. Visually inspected again 5/29/2011 and cannot see any leaks or UV dye.
- Oil – synthetic/regular, Last change: Shell Rotella T 15w40 Conventional & Donaldson Filter, changed on 03/14/2011 @ 148,000 miles. Changed today 5/29/2011 with the same at 151,1## miles. Oil was at proper level, however had thick sludge like "globs" on the old filter and at the end of the oil draining process. Oil is black, there is not milky substance anywhere.
- 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.
- Has this problem ever happened before?: Yes to coolant, no to sludge.
- Describe any related factors that might be part of the problem: Beginning to think headgasket or cracked head.
- 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 - 1,500 miles. I did already try the GM sealant tabs in the upper rad hose and it appears to have done nothing. Currently there does not appear to be any leaks at the crossover, blockout plates, freeze plugs, waterpump, heater fitting or any hose. Upper Rad hose takes 8-10 mins to get hard, coolant cap holds pressure just fine. The exhaust smells normal, coolant looks and smells normal, but the oil is some sludge build up. Oil level never changes. Oil pressure has been around 25 PSI idle, 45PSI otherwise, once at operating temperature since I've owned it.
Have only owned the truck for 5,000 miles. First oil change at 148k appeared normal, however was immediately after PMD runaway incident. Between these two oil changes there haven't been any issues aside from the mystery coolant loss. 2 weeks ago drove it approx 500 miles over a weekend, no issues there. With the exception of 1 short trip (approx 100 miles) all have been without the trailer.
I'm beginning to think this is a headgasket problem or cracked head. I do not think i'm getting anything into the combustion chamber since the coolant tank is acting normal, however i think the coolant once up to operating temp is pressurizing and finding it's way into the oil, and as a result i have a slight sludge build up. Here are pictures of the filter.
I'm debating on filling it with new oil & filter, give it a few days and then re-drain the oil, and see if the sludge re-appears. Is it possible this is a result of the PMD runaway I had where they truck overfueled itself? I changed the oil shortly after that incident, and it has been 3,000 miles since. I plan to send the old oil to blackstone for analysis. If it is coolant in the oil, I know that is BAD for bearings, luckily it's a minute amount that has been making it's way in since the oil level is constant and is still black and oily.
Any other place oil and coolant could mix together aside from the heads, that is somewhere that is a common area. Any way the waterpump could?
