Question about 1999 Chevrolet Blazer

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I am putting my 1998 Chevy 305 intake back together and my bolts got mixed up. I have all OEM bolts is there some kind of reference to use to ensure I get them all in the right place? Including the distributor and hang on.

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  • bspeery Jun 20, 2009

    Thank you, I have all the lower manifold bolts (8ea) in, there is one bolt left that looks just like a manifold bolt but I cannot find the proper location for this bolt. I remember taking this bolt out, just not sure from where. I tried the distributor, but your right I have to lean into it and this bolt is shouldered. Same result at the fuel rail bracket. What a mess, bolts were knocked onto the floor before I could get them marked.

  • bspeery Jun 21, 2009

    "Oh Yeah" Got to together with some minor "back tracking", thanks for you time.

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If you take all of them and lay them out on a bench, you can sort them out by length. Most important are the ones that attach the manifold to the engine. count the bolt holes in the manifold and find the bolts that are all the same length that hold it on. I suggest that you use a flat washer under each of them on any aluminum manifold (even if there were none before) Put the manifold on and put all those bolts in but do not tighten them past one or two foot pounds This will properly align the part and give you the latitude to remove any that aren't right without causing any problems. If there are any brackets that need to be installed where a manifold bolt is, those bolts are sometimes a bit longer. You can "mix and match your way through those that go through items bolted to the front of the engine. Providing a bolt goes in a reasonable amount and you do not have to "lean into it" to get them tight (if so, you may be punching through the bottom of a bolt hole) conversely, you need at least 1/2" of bolt extending into any hole to make sure it can be tightened without tearing the threads out. When putting any brackets on, put all bolts in first before tightening any. Before you cover up the manifold bolts with brackets or anything that will be in your way make sure you torque it down to proper specs (don't remember what "factory" is on yours but it's usually about 30 foot pounds or slightly less) Pretty much you can work your way through this by just doing what I've outlined and using a bit of common sense.
Good luck!

Posted on Jun 20, 2009

  • Richard Scordino Jun 20, 2009

    Been doing this so long that I rarely have this problem (everything gets put into coffee cans full of kerosene to clean them up) but, when you get to the place where the "odd" bolt goes, it will likely be an "oh yeah" moment. Keep it aside till that happens so you don't end up putting it somewhere that will cause you to "backtrack" too much.

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  • 34 Answers

If bolts are various lengths shorter bolts go 2 shallow holes

Posted on Jun 20, 2009

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