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Old 01-26-2010, 02:26 PM   #2
Thealien
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Join Date: Jun 2007
Location: Pine Ridge Florida
Posts: 4,126
Re: 4.8 5.3 ls engine bolts, fasteners, hardware

These LS series engines are pretty uniform. Most everything is 10mm X 1.5 I think there is a couple of 12mm X 1.5

I am pretty sure bothe the bellhousing to engine and starter and even the AC brackets are all 10mm X 1.5. If you have one of those cheap digital calipers you can easily figure out the lengths you need.

At least 1 of the bellhousing bolts has some smaller diameter thread sticking out for an additional nut to hold the dipstick tube. (in a bind you might be able to capture it with just the bolt). They use another one or two of those to bolt the fuel line and wiring harness to.

You may want to call a couple of local parts yards and they may sell you everything you need cheap? When I bought my engine from Spaulding auto they included a bag with all the bolts needed.
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