Engine Problems

[luvrbus]

V band clamps ,use a muffler sealant on the flange it won't hurt anything,but that is not a big enough leak to cause you problems fwiw,check the manifolds and gaskets.

When tightening the V bands tighten and tap lightly will a small hammer and they seal     

[chessie4905]

 See if the other ends of pipes where they connect to manifold are intact and no blow outs on those two pipe/s. If that black soot mark is all you have, I'd pull the rubber boot and check turbo vanes for play and movement. Your air filter is clean?

[eagle19952]

See if the other ends of pipes where they connect to manifold are intact and no blow outs on those two pipe/s. If that black soot mark is all you have,
.......................... I'd pull the rubber boot and check turbo vanes for play and movement. .........................................
Your air filter is clean?

the Turbo (newly rebuilt) ....

lets hope the turbo is fine...

[Seangie]

So I took apart all I could and checked everything (not saying much as I have no idea what I'm looking at/for) then put it back together.

I cannot find any holes in the manifolds or Turbo/exhaust plumbing (it would be pretty obvious with my head in the bay with the engine running correct?)

I took the rubber boot off the Turbo (intake side) and the impeller spins no problem.  How freely should it spin?  I give it a flick and it will go a rotation.  It doesn't spin with zero resistance like a bike wheel would.  There is no damage to the blades on the cold side.  Ill check the hot side later if it continues with the same issues.

I put the pipe clamps back on and it seems to have fixed the exhaust leak.  Ill check that at the end of the run as well.

I started up with no issues.  No smoke.  Ran fine as far as I can tell.  I put it in high idle and no smoke or any issues that I can see or hear.

I'm running to Missoula now.  Hopefully without issue.  Will post later and let you know how it goes.

-Sean

[luvrbus]

 It should spin easier than you are describing you should get around 5 to 10 revolutions with a flick, you can take a soda straw and blow on the wheel it should turn that easy 

[thomasinnv]

Do you have a boost guage?

[eagle19952]

What clifford said...

[TomC]

That small exhaust leak isn't going to make any difference. Try running a short while without the air cleaner. It could also be a plugged up muffler-although a plugged muffler usually shows itself under full power. Pull the air cleaner side off the turbo and see if it spins freely without wiggle on the shaft. Good Luck, TomC

[Seangie]

Cliff -

Its definitely not turning that easy.  Theres no way it would spin with a soda straw.  In the am I am going to remove the hot side exhaust and take a look at that side of the Turbo.  My gut feeling is that it might not be getting enough oil.  I'm just wondering if its hosed now.  That would be a pisser.

I made it to Missoula but the temp on the bus was pretty warm even without the 8k pound van.  It ran between 190 and 205 in the hills (mostly downhill) and it would heat up at the low end of each gear.  When I got out to look the Turbo was super hot.  I should have grabbed the temp gun but didn't think about it.  It was so hot the door on the the engine bay was hot to the touch.

Tom -  I will check the muffler.  I don't think its that especially because the Turbo is not spinning as freely as Cliff described.

Derrick - no boost gauge nor pyrometer.  Both would be very helpful in this situation.

Can anyone reccomend a Turbo shop in Missoula?

Thanks again.

-Sean

[eagle19952]

if spit bounces off...it's to hot.

if spit sticks....it's ok.

old hands pyrometer 

[TomC]

Turbo impeller should not have any sideways wiggle. And it should turn very easily and freely. If it is a bit tight, there's your problem with getting black smoke (slow to spool up). Might have to get another impeller kit. Good Luck, TomC