Little Bit of an Exhaust Leak

[Injun]

Just a little bit.

There are other things going on, too. I turned it in to the mechanic -an actual mechanic, not a tech- because there were symptoms of a coolant sensor problem. Low coolant alarm going off, but coolant not low, not overheating and otherwise seeming to run okay aside from marginal fuel economy and less power than it should have. We'd been watching the turbo because of oil seeping from the gasket to the manifold. Been losing oil slowly, figured a result of that and lately started using coolant, but kept it topped off. Wasn't using it fast. About a gallon a month. So mechanic guy gets under the hood and finds this, which I didn't because I parked it without opening the hood and it wasn't like that when I did the previous pretrip.

Anyway, mechanic says there's an internal leak and wants to pull everything off the right side of the engine. Probably end up with a new turbo and possibly a new manifold as well. I'll be in a rental truck this week. *groan*

Maybe I won't be so worn out at the end of the week after this all is fixed.

 

[mndriver]

Got an easy fix for you...

 

[Fageol]

Just a little bit.

There are other things going on, too. I turned it in to the mechanic -an actual mechanic, not a tech- because there were symptoms of a coolant sensor problem. Low coolant alarm going off, but coolant not low, not overheating and otherwise seeming to run okay aside from marginal fuel economy and less power than it should have. We'd been watching the turbo because of oil seeping from the gasket to the manifold. Been losing oil slowly, figured a result of that and lately started using coolant, but kept it topped off. Wasn't using it fast. About a gallon a month. So mechanic guy gets under the hood and finds this, which I didn't because I parked it without opening the hood and it wasn't like that when I did the previous pretrip.

Anyway, mechanic says there's an internal leak and wants to pull everything off the right side of the engine. Probably end up with a new turbo and possibly a new manifold as well. I'll be in a rental truck this week. *groan*

Maybe I won't be so worn out at the end of the week after this all is fixed.

View attachment 59476

I feel bad for you. Exhaust leaks tend to make sick drivers.

 

[Wore Out]

That's actually an air leak....leaks like that between the turbo and manifold are number 1 cause of low engine performance issues

 

[mndriver]

The CAC pipe normally won't spot like that between the turbo and the CAC.


Something much bigger is going on as well.

I'd say he's right in likely replacing the turbo.

 

[Humble pie]

If you have a wet flange gasket the problem is upstream of the turbo. If you have done a lot of idling without our bumping the rpms it could just be slobber.

slobber is unburnt fuel mixed with soot. It will look like oil, but it’s not. It’s also fairly common and wouldn’t worry about it. It sounds like you have more going on though.

 

[mndriver]

Slobber would be on the exhaust side

 

[Humble pie]

Slobber would be on the exhaust side

You don’t say?

 

[mndriver]

That is between the turbo and the CAC.

If it were slobber, then where is the fuel/oil getting to the intake side

A failing seal on the turbo.

 

[Humble pie]

Did you read her post?

 

[Humble pie]

We'd been watching the turbo because of oil seeping from the gasket to the manifold.

 

[mndriver]

Did you read her post?

I even looked at the pictures too.

The part she has circled is showing soot blowing out the CAC pipe.

 

[mndriver]

Explain how soot/slobber will get from the mounting flange/manifold to the inlet pipe please.

 

[Humble pie]

I even looked at the pictures too.

The part she has circled is showing soot blowing out the CAC pipe.

I know what she circled. I also know what she wrote.

 

[Humble pie]

Explain how soot/slobber will get from the mounting flange/manifold to the inlet pipe please.

I never said it would. Why is it so hard for you to understand. Read her post then read mine. I was addressing the fact she had oil leaking from the flange. She stated she thought it was the turbo. I told her it would not be the turbo if it was up stream of the turbo. I told her that what she was seeing (up stream) was likely slobber. I also told her it looked as if she had more going on than just that.

I hope I explained this clear enough for you. I DID NOT say what was circled was slobber. If this is not clear enough I’m sorry. I don’t have the time to draw a picture

 

[Injun]

If you have a wet flange gasket the problem is upstream of the turbo. If you have done a lot of idling without our bumping the rpms it could just be slobber.

slobber is unburnt fuel mixed with soot. It will look like oil, but it’s not. It’s also fairly common and wouldn’t worry about it. It sounds like you have more going on though.

I don't idle much. There's a bunk heater I prefer to use because I don't trust the weedburner exhaust.

 

[ironpony]

I don't idle much. There's a bunk heater I prefer to use because I don't trust the weedburner exhaust.

Diesels don't normally present the CO risk a gasoline engine does, but its still there. A bunk heater could do it too.

If you're concerned, get a battery operated CO detector. Mount it at the height your head would be lying down in the bunk. Definitely have one if you're running a gasoline fired generator.

 

[Humble pie]

I don't idle much. There's a bunk heater I prefer to use because I don't trust the weedburner exhaust.

I saw red so I assume it’s an ISX. I had to put a head on mine around 600k. Valve guides were leaking oil. It also was wet at the flange gasket, the exhaust side of the turbo and #5 manifold port. That’s also fairly common on these motors. The head don’t last much more than 5 or 600,000 miles

 

[Injun]

More pics
The manifold looks wet because it's been sprayed with Free-All. You can see the oil on the turbo and soot around the manifold.

Cummins ISX 15.

 

[mndriver]

What's the inside of the CAC pipe look like?