Question about 1999 Chevrolet Blazer
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.
Posted on Jun 20, 2009
If bolts are various lengths shorter bolts go 2 shallow holes
Posted on Jun 20, 2009
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Posted on Jan 02, 2017
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