Its leaking from the large band clamp, is this a common exhaust leak on a 12H, C6 engine and is it hard to fix?
Its leaking from the large band clamp, is this a common exhaust leak on a 12H, C6 engine and is it hard to fix?
Thats the "compressor side" of the turbo. There shouldnt be any exhaust there.
I think if you remove the clamp from the orange boot and pull it to the side you'll find its been "slobering" oil and you have bigger problems.[turbo o/h]
+1. Pull the boot off the centre of the compressor side of the turbo (not the one in the photo) and see if you can wiggle the compressor wheel oof the turbo up & down. If you can then it's Goodnight Irene & you need a replacement cartridge at best, a turbo at worst. Whatever of the 2 it is, when you're ordering it don't forget to order new gaskets for the oil lines and the base of the turbo plus the high temp bolts & nuts that fix the turbo to the manifold.Originally Posted by thepumpguysc
I could be wrong, but I think exhaust is leaking from either outlet V clamp, or from steel sealing ring where coupler fits into exhaust side of turbo and air flow from cooling fan is blowing the black soot onto compressor side and air cleaner housing. Watching it while someone fires it off at cold start up should show where the leakage is happening.
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Judging by the soot on the surrounding areas I think Willie is right.
At the same time have someone hold an old tin can or whatever over the exhaust pipe just as the engine is cranking over. That will direct the smoke even more towards the "leak" in the engine compartment.
From the looks of it the V-Band clamp on the exhaust side appears to have been replaced at some time. It looks far too "new" to be original. What's the betting the "nose end" of the silencer that fits into the turbo is partly eaten away..?
Look forward to breaking lots of bolts sorting this one out.
Last edited by Nige; 11-06-2011 at 10:38 AM.
I love this forum,
I put a post up, go to bed, wake up drink a coffee and get help from people I dont even know, much appreciated,
Im still busting my but here but getting somewhere slowly,, most machines are down at the moment but we have a barge in at the moment and there should be a heap of parts on it, as per usual its pouring rain again.
But anyway, the grader has now done 2400hrs, I will do the "exhaust leak check on start up" this morning.
thanks gain to all
If as I posted before the nose end of the silencer is eaten away check to make sure that the top end of the exhaust stack has a working rain trap. Slash-cut exhaust stacks don't work worth a damn in areas like where both you & I are at the moment and where it can rain 50mm+ in the space of an hour. If the exhaust doesn't have a proper rain trap then have an old tin can you can pop over it whenever it's stopped until you can get the right parts.
Get a copy of "One Safe Source" from your local Cat dealer. It's available in pdf form so they should be able to e-mail it to you. It's full of useful bits & pieces like rain caps, etc.
Had to block the exhaust, but its coming from the silver clamp joint, nice work willie.
Nige the only problem i have with rain flaps is they they stick open at times, my operators would not check that on shutdown, at least cut backs give some protection. i have had engines full of water through the exhaust many years ago, love the wet tropics.
Then do what we do and make cleaning the soot off the hinge in the rain flap with a wire brush and confirming it's free to fall whenever the engine stops a planned PM task, and if whoever was supposed to do it (and signed it off on the PM sheet) didn't, assault his ring piece with said wire brush. Problem solved ..
if i gave one of my day shift operators a wire brush to clean a rain flap, I would bet money that the wire brush would be GONE when the night shift came. I can give out a 3 meter 20mm link pulling chain to a shift supervisor and have to chase it up to make sure it does not get lost. I have a tool store person to have out and log tools in the workshop and stuff still gets lost, I could go on and on but its all a bit negative. I have just received a crap load of parts for undercarriage on dozers and general repairs so I need to go and make sure they stay where i want them
Cheers
I share your pain. I'm working with the Caribbean equivalent of "Dumb & Dumber" here too ........
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