C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Problems with my '95

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Old Feb 29, 2008 | 05:22 PM
  #1  
LannyL81's Avatar
LannyL81
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From: Green Valley Arizona
Default Problems with my '95

UPDATE:03/02
Whine noise was the idler pulley. It is shot. So.....if this thing was really dragging, could it have been the cause of the rough idle and no power? Cause if the belt was not turning at full speed, the alternator would not either and that would cause a rough idle and no power running off the battery. But I think I would have smelled the belt burning and also, would not the engine have just over-powered the idler pulley?

Right now the car is running just great as always...pulled the idler off of my '96 and put onto the '95. Checked all the plug wires going into the Opti....and was good and solid.

Any thoughts??????????????




Car came home on a truck...will start but runs really rough when warm...runs fine when cold. Has no power when hot.
There is a whine noise coming from front of engine....something is wrong up there, sounds like a bearing in the Opti Spark.....do these go bad like this?

Replaced the water pump and Opti Spark (GM) just over a year ago, with new wires, plugs, radiator. Has been running just great up until Thursday night.

Refresh my memory....does the water pump need to come off to get the Opti Spark off? I know the balancer has to....but the hub does not, right?

Thanks,
LannyL81

Last edited by LannyL81; Mar 2, 2008 at 02:42 PM.
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Old Feb 29, 2008 | 06:44 PM
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Yes the balancer mounting hub can be rotated so that the opti can clear it, but I'm not sure about it clearing the waterpump though.
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Old Feb 29, 2008 | 07:24 PM
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Water pump and belt tensioner have to come off. Find your receipt and see if you have warranty.
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Old Feb 29, 2008 | 08:35 PM
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Your damned right the bearings in the Opti can "go bad"........

Last edited by NEVRL8T; Mar 1, 2008 at 03:37 PM.
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