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Caterpillar 3208 Solutions This sub-forum is hosted by Mike Hohnstein who has been at this kind of thing for 50+ years now, guess I'm addicted. The saga has been all about progressively larger shop space since then. Honestly, never wanted to get into the CAT 3208's that were originally considered to be a throwaway engine but that's all that works in a FC in my world. Same thing with my Ford toter, that came with a NA, too much effort to hang in a 6, so been at it with the CAT V-8 for 20 years now. In reality you can get excellent life out of a CAT 3208 if it's built correctly. Post your questions about the CAT 3208 engines here and Mike will try to help you out.

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  #11  
Old 10-02-2019
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Mike Hohnstein Mike Hohnstein is offline
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When turbo charger equipped, remove the muffler and replace with a straight piece of aluminized pipe, secure with two band clamps and move on. You'll not hear any difference in noise from the pilots chair.
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  #12  
Old 10-02-2019
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Quote:
Originally Posted by waterweber View Post
LOL, actually checked that. All clear.
Seriously, this happened to me with a motorcycle
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Old 10-02-2019
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Quote:
Originally Posted by Mike Hohnstein View Post
When turbo charger equipped, remove the muffler and replace with a straight piece of aluminized pipe, secure with two band clamps and move on. You'll not hear any difference in noise from the pilots chair.
This is very true. The only time I know I'm straight piped is when I open the window. (And sometimes I do just to hear it!)
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  #14  
Old 10-02-2019
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Many of these 30 year old CAC's are leaking.
recheck air throttle for full extension , there is a torsion spring on the throttle rod, that is hard to see that could limit full extension
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  #15  
Old 10-02-2019
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Post 14 is where I found my power issue last year
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  #16  
Old 10-02-2019
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That video, the Adept Ape. He is a good guy. He answers his emails. I think he is intrigued with my Cummins powered Bluebird. We have had several back and forth conversations. You look at his profile and about and you will see his email. His life is Cats so maybe hit him up.
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  #17  
Old 10-03-2019
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Be advised, when situations arise where there is a power loss, the best course of action is to evaluate the basics, not search for a 'what could it be' answer from above.
For instance, clogged fuel filters will result is low boost before totally shutting down the engine, low power and lots of smoke, check intake air filtering, however a popped CAC hose will result in low power/excessive smoke but way high egt's, clogged air intake won't show high egt temp.
3208 is known for head gasket issues, particularly in motor home applications due to the extensive down time related to the average use. Gaskets can fail and lose compression is various direction around the cylinder, no guaranty failure will pressurize the coolant or the crankcase, had one pop between cylinders once. A V6 Cat is weak I can tell you.
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  #18  
Old 10-03-2019
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Has the ZF transmission been checked that it's shifting as it should or could it be not downsizing and lugging the engine? Is the acceleration from zero decent? Did you try to lock it 1 to see how much boost you can get out of it?

Assuming you have been getting the best engine advice above and would like to check other possibilities.
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1988 FC-35SB 300HP/ZF (2016-current)
1978 GMC Royale 26' (2015-2016)
1982 FC-33SB 250HP (2007-2009)
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  #19  
Old 10-03-2019
waterweber waterweber is offline
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As stated above, I've checked the CAC, zero leaks. Checked all turbo hoses between turbo outlet and engine intake, zero leaks. Checked the throttle for full extension, it cant go any further when the pedal is floored. Spring looks normal I'm up around 3000rpm at full throttle with max boost floored under load at 7psi. Tons of black smoke and rising EGTs.
New fuel filters, new fuel, new air filter, checked all intake piping, clear. Electric fuel pump works.
Massive loss of boost under the pass side valve cover.
I'm assuming its either a crack in the intake passages on the head, a bad intake valve seal with a leak into the valve area or a really bad head gasket.
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  #20  
Old 10-03-2019
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Out of curiosity, how many hours and miles are on your 3208 and coach?
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1988 FC-35SB 300HP/ZF (2016-current)
1978 GMC Royale 26' (2015-2016)
1982 FC-33SB 250HP (2007-2009)
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