I just picked up a hijet that is content on blowing a blue smoke screen. I am planning on tearing it down and doing a rebuild. Does anybody know where I can find the specs this motor needs to be torqued to? I will definitely need to find the specs on the connecting rods and the cylinder head at the very least. Thanks
The heads of the bolts have grade numbers on them, i.e. 3.6, 8.8, 10.9, which tells you the strength of the bolt. Google "metric torque table", and look at images. You will find a bunch of tables that have the bolt size, grade, and proper torque for that combination. This is the way my factory service manuals for my old Toyota trucks said to do determine the correct torque. Always clean and lube the threads, or torque readings are meaningless. If you can find one the old beam type torque wrenches, they are more useful than the new click type wrenches. Because, if the needle is bouncing around on the old beam style you know the threads are seizing, and then releasing. Which means you need to reclean and lube the threads.
Here are the numbers that I got from G&R imports Connecting rod bearing cap - 22 ftlbs Main bearing cap - 34 ftlbs Head bolts - 36 ftlbs Those are the specs that I put my motor together with and its held together so far.
