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Old 12-04-2019, 06:39   #1
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Cat 3208 Turbo charger exhaust

Well old shorty found a problem that I need some help on. Attached are some photos of the water cooled exhaust pipe that comes from the exhaust manifolds. Seems the clamps that hold it against the pedestal the turbo mounts too have cracks and wont tighter up on pedestal and leak exhaust fumes. Seem's nobody knows a part number for these as I have talked to some cat marine parts people. I have attached the photos of the pedestal where they are mounted and another of the clamp itself. Search the internet with a image file and all kinds of descriptions of it and got nothing. Sooooo if I cant buy these someplace Im going to have to resort to machining them out and Ill tell your right now it wont be made of cast steel. So if anybody can tell me who has these, I will buy them instead of machining them. Looking at them they dont look like there were created strong enough to do the job anyway.
Boat is 1979 Bertram 33 fisherman with Cat 3208 260 hp. Can not locate the serial numbers on engine anywhere but was told it was a 3208 Y model diesel. Has no intercooler between turbo and intake. Was told it was the only marine engine that didn't have them. Interesting that they boat showed 29.0 MPH on Garmin GPD at 2400 rpm with clean hull and 4 bladed props. Captain on board thought that was pretty good.

Thanks

Shorty
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Old 12-04-2019, 07:13   #2
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Re: Cat 3208 Turbo charger exhaust

Any 1/2 decent welder fabricator could gas cut you out some from a bit of plate if you can't find them but that is a common engine so you will be able find them.
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Old 12-04-2019, 07:27   #3
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Re: Cat 3208 Turbo charger exhaust

Yup second in the cutting but for extra measure drop them off at a shop with a cnc plasma or laser and they will do cheaper than anyone could hand make them for you (though you may have to wait a couple weeks)

If it were mine i would weld it back up though
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Old 12-04-2019, 07:56   #4
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Re: Cat 3208 Turbo charger exhaust

3208 was a throw away motor,
I have a 3208 Turbo V8 300 HP motor in my RV, Its on a Oshkosh chassis,

Try a Truck wreckers on line for the parts, They were a very common motor,
Or a Truck or bus Diesel repair company, They will get you the parts if they dont have them sitting on the shelf,
They were very common motor in Garbage trucks,

Dont make the mistake of telling them its on a boat,
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Old 12-04-2019, 09:31   #5
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Re: Cat 3208 Turbo charger exhaust

Well I agree about the plasma cutter but a water jet is a lot better. I have a plasma cutter for hand cutting but I have had some water jet work done and like it a lot better. I just can justify buying one lol. Have two lathes and a mill and been making parts for myself a long time. Im retired so I have the time to make them. Welding cast steel. I was taught to put it in an oven and get it dull red and then pull it out after weld it put it back heat it back up and turn the over off and leave it in there and cool off. Could also use a lime box too. But I've learned everybody has their way of doing it. Being licensed aircraft mechanic I would much prefer using 4130 a little thicker and then machine a little more metal into the top part where its cracked. Thats the weaker spot of that part. Didnt think about looking at the trucks even knowing they were used in trucks too. Did get told by a cat dealer that the turbo on that engine was an marine add on. So from that I didn't figure a truck place would have them.

Thanks all for the feed back

Shortstan
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Old 12-04-2019, 10:18   #6
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Re: Cat 3208 Turbo charger exhaust

Yea you could weld it using yr pre & post heat method. Just add a bit of plate on the top & weld it on as well. Often used that trick to stop cracks spreading.But yes yr plan of making new frm 4130 probably better still
Post a pic please if you make another
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Old 12-04-2019, 11:41   #7
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Re: Cat 3208 Turbo charger exhaust

There should be a tag on the engine with the serial # and a arrangement #. Give the cat dealer the arrangement # and they can find exactly what parts were used to build it. If any parts have been replaced with aftermarket parts then this wouldn’t necessarily match.
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Old 12-04-2019, 11:55   #8
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Re: Cat 3208 Turbo charger exhaust

Cat mech. for 28years . 3208T truck engines and 3208T marine engines totaly differant animls . Truck eng Turbo mounts in the V of the block at the back. 3208T marine engine turbo mounts on the manifold crossover. That part should be fairly generic to a 3208T marine. If they discontinued the part it looks easy to fabricate.
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Old 15-04-2019, 09:11   #9
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Re: Cat 3208 Turbo charger exhaust

UPDATE

Having them made for $75 a piece out of carbon steel. Will post a photo of them when done and if I'm happy with their work I will post it. Somebody knows some good exhaust sealer besides the permtext copper high temp please let me know. Seem to work ok though

Ill look for the serial numbers but I got a feeling they might have been put in out of a truck. Reason being the starboard engine had the 1" return hose (from the turbo to necked down smaller and was hooked to a fitting on the front of the engine. Port engine had a 1" 90 degree fitting attached to the oil pan with what looks like J&B weld plate and fitting. I machined out a plate and then drilled hole in pan and replaced the small hose. Attached my fitting with gasket I made and RTV (high temp) and then used 5 structural aircraft rivets. Was all my son could do to pull them rofl. No leaks so far around it or hoses. I should write up about what I found after I bought the boat that I paid to have inspected with engine inspection. Never got the engine oil report back either. Lab was behind in their testing Hope he went to confession

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Old 15-04-2019, 17:24   #10
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Re: Cat 3208 Turbo charger exhaust

Hope you do write about purchase,survey etc. Sounds like a good story. How are they being made? Profile cutter?
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Old 22-04-2019, 06:50   #11
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Re: Cat 3208 Turbo charger exhaust

Well attached is a photo of the what they refer to as dog ear clamp. Have one comment actually 2 comments.

1. There not all cut out the same.In other words each one is a little different.
2. The holes in them have been elongated. Original one were not.

Refer to original photos I uploaded.

Shortstan
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Old 22-04-2019, 11:56   #12
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Re: Cat 3208 Turbo charger exhaust

Elongated holes alow for movement (Thermal Expantion) when the exhaust gets hot. Otherwise the hardware or brackets would break.
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Old 22-04-2019, 14:35   #13
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Re: Cat 3208 Turbo charger exhaust

Wouldn't worry about it too much as long as they fit. I'm sure they will fit with a little grinding/filing if necessary.
Slotted holes are to make it much more likely to fit.
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