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Thread: 496 HO question

  1. #1
    Chubby4Life
    I threw a serpintine belt today and have concerns about timing. Will the engine be out of time since it continued to run when the belt came off? Also, the alarm went off indicating high temp. Did I also grenade the the impelller and/or housing?
    On a good note though, I was towed in by a DCB, so I guess their not all non-waving, tailgaters.
    Chris
    BTW, F-Tahoe in the afternoon!

  2. #2
    OverKill
    I threw a serpintine belt today and have concerns about timing. Will the engine be out of time since it continued to run when the belt came off? Also, the alarm went off indicating high temp. Did I also grenade the the impelller and/or housing?
    On a good note though, I was towed in by a DCB, so I guess their not all non-waving, tailgaters.
    Chris
    BTW, F-Tahoe in the afternoon!
    No you did not put the motor out of timing. Timing is all gear realted. As far as the high temp indicated, I'm guessing you have a closed loop system. If so the only thing you did was stop pumping water, witch would give the high temp alarm. If if were me, I would replace the belt, put it back in the water and let it idle for a few minutes and read all my gauges. Of thats where I would start anyway.
    OverKill

  3. #3
    Chubby4Life
    No you did not put the motor out of timing. Timing is all gear realted. As far as the high temp indicated, I'm guessing you have a closed loop system. If so the only thing you did was stop pumping water, witch would give the high temp alarm. If if were me, I would replace the belt, put it back in the water and let it idle for a few minutes and read all my gauges. Of thats where I would start anyway.
    OverKill
    Thanks for the info. The belt looks fine (no cracking, no visible streching) it looks like the tension bolt jumped out of the hole it sits in. Could've fixed it on the water but every time I was close to having it back on a 5' roller would F me up.

  4. #4
    Beer-30
    I threw a serpintine belt today and have concerns about timing. Will the engine be out of time since it continued to run when the belt came off? Also, the alarm went off indicating high temp. Did I also grenade the the impelller and/or housing?
    On a good note though, I was towed in by a DCB, so I guess their not all non-waving, tailgaters.
    Chris
    BTW, F-Tahoe in the afternoon!
    Wow.
    No, the timing is all internal. Accessories (H2O pumps, PS pump, alternator) are not timed. Put the new belt on and the motor won't know the difference. The major concern would be in the form of a question - why did the belt come off?
    The impeller doesn't care in the sea-pump. The high temp from no water could have cause problems if you went a long distance, but probably not.

  5. #5
    257
    If just the belt came off i still replace the impeller if you
    havent this year

  6. #6
    Chubby4Life
    Wow.
    No, the timing is all internal. Accessories (H2O pumps, PS pump, alternator) are not timed. Put the new belt on and the motor won't know the difference. The major concern would be in the form of a question - why did the belt come off?
    The impeller doesn't care in the sea-pump. The high temp from no water could have cause problems if you went a long distance, but probably not.
    Thats a very good question. I have no idea, we were going "with" the swells, but the boat was rolling back and forth pretty good. Unless the tensioner was already loose, I can't see how the belt would jump. I'll follow the advice given and hunt down a new belt in the morning.

  7. #7
    Chubby4Life
    Also, we were only traveling about 15 mph, I felt the steering tighten up and put it in neutral to check it out when the high temp. alarm went off.

  8. #8
    Beer-30
    The other reason a serp belt would dismount is a frozen accessory. Check both pumps, the alternator and the idler(s) for free movement. If they spin, they are ok. If they don't, that is your cause.
    You should have had an alarm about one of those not doing their job, though.
    The system is manually tensioned, not spring loaded. It is possible that the belt just finally stretched enough to jump off.

  9. #9
    Chubby4Life
    The other reason a serp belt would dismount is a frozen accessory. Check both pumps, the alternator and the idler(s) for free movement. If they spin, they are ok. If they don't, that is your cause.
    You should have had an alarm about one of those not doing their job, though.
    The system is manually tensioned, not spring loaded. It is possible that the belt just finally stretched enough to jump off.
    Well, I went out and checked the pulleys. All spin freely except for the pump on the lower starboard side. this is the impeller pump right?

  10. #10
    LHC30Victory
    Well, I went out and checked the pulleys. All spin freely except for the pump on the lower starboard side. this is the impeller pump right?
    Yes, that is the seawater pump. It wont turn by hand all that easily as you are trying to compress the rubber vanes in the pump....Put the belt back on, check for proper tension and watch all the pulleys to see if they are turning and if they are still in line with each other....

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