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Cummins ISL composite oil pan

Yahoo Message Number: 101164
My coach is at Cummins. A few months ago they replaced the oil pan gasket to correct a leak, and reused the pan isolator bolts . Now I'm back because it is leaking again. I asked if this is warranty (because they didn't fix it the first time), and they replied "yes." Now they say they have found a Cummins bulletin saying to replace the pan bolts when a gasket replacement is done. Today in a followup email they say I have to pay for the new bolts because they are a "product improvement." That implies that the new bolts are in some way different from the original.
I have asked to see the bulletin before picking up my coach, but while I'm waiting, has anyone heard of an improved isolator bolt for the fiberglass oil pan?

Thanks

George Harper
04 Allure

Cummins 400 ISL

Re: Cummins ISL composite oil pan

Reply #1 –
Yahoo Message Number: 101165
With my ISL it was recommended that the fiberglass pan be replaced with a metal one in 06.  I haven't had any leaks since.  But its a hassle as the drain plug -hole isn't in the correct place and there is no provision for connection of the hose from the reserve oil tank with the metal pan. .  TWI 2004 Intrigue 11731

Re: Cummins ISL composite oil pan

Reply #2 –
Yahoo Message Number: 101166
Perhaps a call to Cummins Tech Support, to talk over what and why they are changing things?

My 04 ISL370 had leaking from the pan bolts at the time we were doing our pre inspection purchase. Cummins Cal Pacific, in El Cajon, made this repair per the direction of Holland Motor Homes. (I covered the costs for a recommend change to the breathing tube, as well as fluids analysis, checking the engine and chassis.)

As Holland covered the pan leak, I don't know for sure if this included new bolts or not... but seems to me that it did.

Best of luck to you on this one!

Smitty
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Cummins ISL composite oil pan

Reply #3 –
Yahoo Message Number: 101167
IMO -- if all I'm paying for is the parts they probably should of used the first time and I'm getting a new gasket, new oil and free labor -- I'd pay that bill,  no question! I'd be asking about a steel pan myself, something about a fiberglass pan just doesn't sit right with me. Not that I plan on dragging my pan over anything,  but..... S**t Happens!

Jim Lewis

Infinity Coach

Re: Cummins ISL composite oil pan

Reply #4 –
Yahoo Message Number: 101170
The main problem with my pan was where the hose that supplied oil to the pan from the reserve tank would work itself loose and then flex causing the pan to start to crack.  The crack never got bad enough to allow oil to leek but would have eventually and the hose was always working itself loose causing a minor drip.  Maybe a quart and a -half a year, whether the engine was running or not.  That hose is now connected to an inspection plate on the side of the block, which was drilled and tapped for the fitting on the hose.  Because of the pan protection shield they drilled a hole on the side of the pan and installed a spicket valve and a hole in the pan shield for the oil to drain thru.  TWI 2004 Intrigue 11731

Re: Cummins ISL composite oil pan

Reply #5 –
Yahoo Message Number: 101182
A few years ago I back over a piece of concrete that had a iron re-bar sticking up and holed the composite oil pan.  The company that replaced it said "per Cummins they would have to replace all the mounting bolts and the rubber grommets (installed on the bolts to act like shock absorbers) when ever the pan was removed for any reason" All told it cost me about $1100.00.

Earl Densten

03 Intrigue 11554 (ISL-400)

Re: Cummins ISL composite oil pan

Reply #6 –
Yahoo Message Number: 101206
In my case of a leaking oil pan at Cummins for the second time, there is no "product improvement." regarding the pan bolts. That must be some kind of customer mollifying term. What they should have said was, "we should have looked at the Cummins repair instructions the first time because it says to replace the isolator bolts when the pan gasket is replaced. So now that we are putting in new bolts this time you have to pay for the bolts, but we'll cover everything else." So, I paid another $325 for the 32 bolts. Add to that what I paid the first time and it comes to $1,262, and my pan was not damaged as yours was...geez.

So, I picked it up Friday. When I got home I went under there and there is some oil collecting on some exposed gasket sealer. I immediately sent a photo back to Cummins. They accept responsibility and say this allows them to see the workmanship of their guys. It is good that they have a responsible attitude, but I don't know what it is going to take to get it right. I will monitor it for a couple of thousand miles to make sure it is new oil although they cleaned it well.

Oddly enough, the isolator bolts according to Cummins literature are for isolating noise. I assumed the rubber washers protected the fiberglass pan from destructive diesel harmonic vibration. Not so.

George Harper
04 Allure 31093