Back in May 2018, I had RV Mobile Lube come out and service the Cummins 360 ISC engine in our 1999 American Eagle Class A, just as they've done every couple of years or so since we bought our coach in 2007.
About a month later we left Houston on a 2000+ mile trip up to Illinois and back down thru Alabama, and then back to Houston. we very quickly discovered we were leaking oil, about a gallon every 250 miles or so, turning our tow vehicle black. So to keep our schedule we just added oil as needed along the way.
Checking it was obvious that the leakage was coming from around the oil filter itself. But retightening it did not help. Talking with Cummins, they thought it was probably a defective filter.
So when we got back to Houston a few weeks later, I called RV Mobile Lube and they came back out and replaced the filter. After running the engine at high idle for about 45 minutes, we had no sign of any leaks. But to be sure we took the rig out a 50-mile test drive at both Interstate and side street speeds, again with no leaks.
Thinking we had the problem fixed, in October we headed down to Florida on another 2000+ mile round-trip. And we still had leaking oil.
Getting home about 3 weeks later, and talking with Cummins again, they thought it was probably burn-on residue where the oil filter gasket contacts the adapter. So I dropped the filter and cleaned the gasket seat thoroughly. And another test drive showed no leakage.
But on a 500-mile roundtrip in April 2019 we still had leakage. It was starting to dawn on us that we only had leakage when we were towing our pickup truck.
Back on the phone, a Cummins tech said it had to be the gasket between the oil cooler and the oil filter adapter.
Supposedly all I had to do was to remove the filter, remove the 4 bolts holding the adapter on, clean it and replace the gasket, and then put it all back together.
Well, removing the filter and the 4 bolts went fine, but the adapter won't come loose. And even tapping with a rubber mallet didn't help.
Finally, I put the old filter back on and ended up rapping it with the mallet, again with no luck. It was stuck tight.
Back on the phone with Cummins, the tech went away for about 10 minutes, he came back and told that the center post was actually a bolt and needed to be removed too. But the tech bulletin they sent me doesn't match up with what I have.
On my adapter, the center shaft is not a bolt. So now I'm stuck.
But before I get back on the phone to Cummins I thought I throw this out to the group.
Anyone run into this before or have any ideas about how to get the adapter off.
About a month later we left Houston on a 2000+ mile trip up to Illinois and back down thru Alabama, and then back to Houston. we very quickly discovered we were leaking oil, about a gallon every 250 miles or so, turning our tow vehicle black. So to keep our schedule we just added oil as needed along the way.
Checking it was obvious that the leakage was coming from around the oil filter itself. But retightening it did not help. Talking with Cummins, they thought it was probably a defective filter.
So when we got back to Houston a few weeks later, I called RV Mobile Lube and they came back out and replaced the filter. After running the engine at high idle for about 45 minutes, we had no sign of any leaks. But to be sure we took the rig out a 50-mile test drive at both Interstate and side street speeds, again with no leaks.
Thinking we had the problem fixed, in October we headed down to Florida on another 2000+ mile round-trip. And we still had leaking oil.
Getting home about 3 weeks later, and talking with Cummins again, they thought it was probably burn-on residue where the oil filter gasket contacts the adapter. So I dropped the filter and cleaned the gasket seat thoroughly. And another test drive showed no leakage.
But on a 500-mile roundtrip in April 2019 we still had leakage. It was starting to dawn on us that we only had leakage when we were towing our pickup truck.
Back on the phone, a Cummins tech said it had to be the gasket between the oil cooler and the oil filter adapter.
Supposedly all I had to do was to remove the filter, remove the 4 bolts holding the adapter on, clean it and replace the gasket, and then put it all back together.
Well, removing the filter and the 4 bolts went fine, but the adapter won't come loose. And even tapping with a rubber mallet didn't help.
Finally, I put the old filter back on and ended up rapping it with the mallet, again with no luck. It was stuck tight.
Back on the phone with Cummins, the tech went away for about 10 minutes, he came back and told that the center post was actually a bolt and needed to be removed too. But the tech bulletin they sent me doesn't match up with what I have.
On my adapter, the center shaft is not a bolt. So now I'm stuck.
But before I get back on the phone to Cummins I thought I throw this out to the group.
Anyone run into this before or have any ideas about how to get the adapter off.
