Jon89le Posted October 16, 2002 Report Share Posted October 16, 2002 Can i reuse my plenum bolts? I just bought new lower intake manifold bolts and i dont really want to buy new plenum ones too unless i have to. thanks.. Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted October 16, 2002 Report Share Posted October 16, 2002 i did. it's not crucial like head bolts or anything. if you do buy new ones make sure you get the right ones. '91+ have rubber sleeves that surround the bolts (bolts are smaller too), and the plenum bolt holes are bigger because of the rubber sleeve. previous years have smaller bolt holes and the bolts are bigger but no sleeves. i hope this makes sense! btw, this is for the 3.1... joshua Quote Link to comment Share on other sites More sharing options...
Jon89le Posted October 16, 2002 Author Report Share Posted October 16, 2002 alright...thanks a lot. Mine is an 89 and IIRC, i didnt have any sleeves or anything. Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted October 16, 2002 Report Share Posted October 16, 2002 The only bolts you can't reuse are head bolts. Actually, the service manual says you can reuse them, but nobody in their right mind takes risks on head bolts (stretch bolts). Quote Link to comment Share on other sites More sharing options...
Guest Posted October 16, 2002 Report Share Posted October 16, 2002 i reused the head bolts...but I tapped all the holes and cleaned the bolts up ahead of time. Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted October 16, 2002 Report Share Posted October 16, 2002 i reused the head bolts...but I tapped all the holes and cleaned the bolts up ahead of time. Â You haven't had any problems with it? The reason you aren't supposed to reuse head bolts is because they're "stretch to yield". The bolts actually stretch out of their original shape. I suppose the bolts could be designed that they could be stretched a bit more and not lose strength, GM seems to think so anyway, but I've never heard of anyone actually reusing them (till now). Quote Link to comment Share on other sites More sharing options...
ctx46 Posted October 16, 2002 Report Share Posted October 16, 2002 ford is the only one that use torque to yeild bolts.... and even those can be re-used, it just takes a digital torque wrenchthat can do % of strech.... I youst to work @ gofer state engine rebuilding in the twin citys (MN) and thats exactly what they do..... gm never did that to my knolage. if you re-use then you ust need to torque them down in smaller increments, thats all...... and gofer engins only had 6 combacks last year that they rebuit..... Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted October 16, 2002 Report Share Posted October 16, 2002 The 2.8/3.1 uses stretch bolts. Any bolts that are torque to a certain spec, then turn so many degrees are torque to yield, and they are. The service manual recommends using a torque angle meter, but I just eye-balled it. Quote Link to comment Share on other sites More sharing options...
gpse3200 Posted October 28, 2002 Report Share Posted October 28, 2002 Eyeballs? EWW!!! Too cheap to buy the indexer eh? LOLOL J/K Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted October 28, 2002 Report Share Posted October 28, 2002 How much is the indexer? I've seen the digital Torque Angle Meter on Ebay go for hundreds! Quote Link to comment Share on other sites More sharing options...
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