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Need help on Cat C15
I have a 2008 Peterbilt with a Cat C-15 motor in it. Serial prefix SDP. Truck started smoking white smoke real bad. It quits as soon as I cut out #5 cylinder. There are no codes. Here's is what I've tried so far that hasn't worked: New injector in #5. Switched injectors 5 and 6. Switched Iva's 3/4 with 5/6. Compression tested 5 and 6, both tested about 250 psi before popping the seal on tester. I'm pretty sure it's fuel in the exhaust and not coolant. I'm leaning towards wiring/ecm problem now even though there is no codes. What do you guys think?
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2005 Ford 250 Super DutyQuote:
Originally Posted by Pete379X
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I have a 2008 Peterbilt with a Cat C-15 motor in it. Serial prefix SDP. Truck started smoking white smoke real bad. It quits as soon as I cut out #5 cylinder. There are no codes. Here's is what I've tried so far that hasn't worked: New injector in #5. Switched injectors 5 and 6. Switched Iva's 3/4 with 5/6. Compression tested 5 and 6, both tested about 250 psi before popping the seal on tester. I'm pretty sure it's fuel in the exhaust and not coolant. I'm leaning towards wiring/ecm problem now even though there is no codes. What do you guys think?
2005 250 Super Duty Crew. White and Grey. ARP studs, EGR Delete, and SCT from Vivian. CCV re-route, and 4" Magnaflow turbo back.
Other trucks:1980 KW Ext hood, 1982 Kenworth Cabover Aerodyne (BJ and the Bear) 2000 and 2003 Kenworth W900's. 2003 Pete EXHD. All Caterpillar Power. My 2003 has an MBN I converted to 6NZ. Early 550 file, 211-3025 squirts. 800 cam. Acert twins via custom mount. ARP head bolts.
Transporter and Operator of a Bauer Built Championship Unlimited Tractor Pulling Sled for the United Pullers of the Carolinas, Region IV affiliate of the National Tractor Pullers Association (NTPA), and damn proud of it!!!!
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No it continues to smoke. I should also mention motor was overhauled with a new engine block about 80,000 miles ago. I had the head inspected and re-used at that time. Because it has good compression and I'm sure it's fuel and not coolant I don't believe it's a head/gasket problem. I'm stumped at this point.
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Just pressure test the cooling system and you will see. I'm willing to bet Sled is right. Just cause the block was new doesn't mean it was right. I bought a new head that had to be machined flat, had a friend buy a new crank that was bent.
Sorry hope it isn't a head gasket!
Sorry hope it isn't a head gasket!
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Well I learned what a bottle test was today. Did that and it failed. No bubbles at all until the engine warmed up to about 170 deg then it started bubbling like crazy. However the coolant pressure doesn't go over 15 psi. Looks like you guys were right and it's the head gasket. Thanks for the help. Ill be taking the head off tomorrow. Btw if I pressurize the coolant system I should see coolant coming into hole 5 looking through injector cup or from underneath?
Last edited by Pete379X; 06-01-2016 at 10:58 PM.
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Quote:
Originally Posted by Pete379X
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Well I learned what a bottle test was today. Did that and it failed. No bubbles at all until the engine warmed up to about 170 deg then it started bubbling like crazy. However the coolant pressure doesn't go over 15 psi. Looks like you guys were right and it's the head gasket. Thanks for the help. Ill be taking the head off tomorrow. Btw if I pressurize the coolant system I should see coolant coming into hole 5 looking through injector cup or from underneath?
However. ...... sometimes the engine needs to be hot for it to leak.
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I finally had time to pull the head off and found exactly as you guys suspected. Fire ring on 5 was blown out by one of the bolt holes, closest to 6. I need some help figuring out what caused this. I plan on bolting down the spacer plate around 5 and checking the liner protrusion again. I don't suspect this will be the problem as the new block was disassembled from a new motor and sent to machine shop for machining before I got it. Could a warped head or spacer plate be the cause? What else should I look for?
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Quote:
Originally Posted by Pete379X
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I finally had time to pull the head off and found exactly as you guys suspected. Fire ring on 5 was blown out by one of the bolt holes, closest to 6. I need some help figuring out what caused this. I plan on bolting down the spacer plate around 5 and checking the liner protrusion again. I don't suspect this will be the problem as the new block was disassembled from a new motor and sent to machine shop for machining before I got it. Could a warped head or spacer plate be the cause? What else should I look for?
Have head surfaced, and new spacer plate.
While the pistons are out, have a good machine shop cut .080 off the tops. Trust me, you'll thank me later. That's drops the comp ratio from 18.1 to around 16.
2005 250 Super Duty Crew. White and Grey. ARP studs, EGR Delete, and SCT from Vivian. CCV re-route, and 4" Magnaflow turbo back.
Other trucks:1980 KW Ext hood, 1982 Kenworth Cabover Aerodyne (BJ and the Bear) 2000 and 2003 Kenworth W900's. 2003 Pete EXHD. All Caterpillar Power. My 2003 has an MBN I converted to 6NZ. Early 550 file, 211-3025 squirts. 800 cam. Acert twins via custom mount. ARP head bolts.
Transporter and Operator of a Bauer Built Championship Unlimited Tractor Pulling Sled for the United Pullers of the Carolinas, Region IV affiliate of the National Tractor Pullers Association (NTPA), and damn proud of it!!!!
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Quote:
Originally Posted by Pete379X
View Post
I finally had time to pull the head off and found exactly as you guys suspected. Fire ring on 5 was blown out by one of the bolt holes, closest to 6. I need some help figuring out what caused this. I plan on bolting down the spacer plate around 5 and checking the liner protrusion again. I don't suspect this will be the problem as the new block was disassembled from a new motor and sent to machine shop for machining before I got it. Could a warped head or spacer plate be the cause? What else should I look for?
2005 250 Super Duty Crew. White and Grey. ARP studs, EGR Delete, and SCT from Vivian. CCV re-route, and 4" Magnaflow turbo back.
Other trucks:1980 KW Ext hood, 1982 Kenworth Cabover Aerodyne (BJ and the Bear) 2000 and 2003 Kenworth W900's. 2003 Pete EXHD. All Caterpillar Power. My 2003 has an MBN I converted to 6NZ. Early 550 file, 211-3025 squirts. 800 cam. Acert twins via custom mount. ARP head bolts.
Transporter and Operator of a Bauer Built Championship Unlimited Tractor Pulling Sled for the United Pullers of the Carolinas, Region IV affiliate of the National Tractor Pullers Association (NTPA), and damn proud of it!!!!
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Quote:
Originally Posted by SledMan
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I just read your original post again. You're SDP, so your comp is 17.1 probably so you'll be ok. Or just cut .040 off to be safe. Get me the serial and I can tell you what the CR is
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