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05 /19/ 26, 6:44pm

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Subject: 1978 31' FC NOISE-VIBRATION-FUMES Author: Steven Daniels [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 10/ 15/ 01, 9:09am I am new to BBs and have some concerns about a model I may be interested in purchasing. It is a 1978 31'FC with a 210 3208 motor. At idle and while driving, it emits much more noise than my 24' gas powered Class C of the same vintage. Is this to be expected, or can it be cured with insulation? Also at idle, there is a lot of vibration (enough to shake through your whole body). It does not appear to increase or decrease while the vehicle is being driven but can be felt throughout the whole coach. It does, however, diminish the further aft you go. Is this something one lives with in an FC, or an indication of problems (i.e. bad U-joints, something out of balance, loose/worn motor mounts, etc.)? The motor smokes at idle. Normal or not? Should one be smelling exhaust fumes in the coach? This could be due to the fact that the exhaust exits just aft of the coach door. If it needs to be rerouted, where should it exit? Any insights, advice and/or comments will be greatly appreciated. Thank you. [ Next Thread | Previous Thread | Next Message | Previous Message ]

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[> Subject: Re: 1978 31' FC NOISE-VIBRATION-FUMES Author: Jeff Miller [ Edit | View ] Date Posted: 10/ 16/ 01, 3:40pm All could be normal, depending on how much. The 3208 Cat is famous for white smoke during warm-up, a later fuel injection system can reduce it. Running warm it should not smoke. Black or blue smoke is different, some black on acceleration is okay when warm, too much indicates restricted air filter, bad injectors, or injection pump out of calibration. blue smoke is noramlly crankcase oil burning. Some vibration at idle is normal, enough to shake the mirrors is probably not. Different vibrations can mean different things. Noise will be more than a gas engine, you're sitting on a 10.4liter V-8 diesel BUT, look in the engine compartment to see if the insulation is shot, it probably is. The noise can be reduced with new and better insulation, and new carpet, but again not as much as a new gas engine or a pusher. The exhaust IMO should be routed out the left rear corner, but 4" pipe is not cheap. Have the engine surveyed by a reputable CAT dealer, he can tell you much. Also look for maintenance records, a neglected Cat is an expensive one. Oil and filter changes, anti-freeze testing, valve-lash setting, and fuel maintenance is all important. You should also have good oil pressure, >35psi@idle. These are all normal vehicle items. The difference is truck parts will last a long time, but are expensive to buy. - Jeff [ Post a Reply to This Message ]