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Posted by mha5055, Mar 15, 2010
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.
As suggested.. its definetly recommended to pull engine apart and get everything checked. Do things right the 1st time
have the crank checked and have the big end of the rods checked and resized as needed....
install new bearings, gaskets and rings.. at thhis time you may want to install the BSE kit
99.9% chance you crank is tore up and going to need ground if it was bad enough to be making noise. I am in the process of a rebuild due to a spun bearing. My crank was tore up and it was makeing no noise. I found it by metal in the pan and knew exactly what was going on. Do it right and do a complete overhaul or your just going to be doing it again in a few months.
Take them in to the machine shop with you and they will tell you
Be sure that the pump is building pressure, and that the oil galleries are free of debris. Unfortunately, since the oiling system does not [cannot] serially connect the oiling points, building pressure at one point (pump housing, head, &c...) does not mean you will have pressure available at other places, so you can't assume that because your gauge shows that you're building pressure at the pump housing that there is flow at all of the crank journals. A proper rebuild should be in order.
mine is a 1985 with 220k on it (but it is a FORD ) and has not spun a rod bearing
low oil pressure in the upper rpm or just trash in the oil , or streched rod bores cause most all spun bearings.
the diffrence in rod bore specs from low to hig is .0007 or 7 tenths of one thousand of one inch , the tickness of a sheet of notebook paper is appox .003
It could be a multitude of things but from your statements right now I would strongly advise you to seek out a very good machine shop somewhere near you and/or garage with DSM experience. There is more to building an engine than just getting something honed and putting things back in. There is a lot of measurements involved pre machine shop and post machine shop during the build.
You should just get a whole build done now if you every plan on making more power. At least get some stronger rods as they are fairly cheap in price. ARP internals, BSE, all new gaskets etc.
Find and talk to the machine shop and they will tell you what you will need unless there is a local DSMer on here that is close to you willing to help you out that has done this before. I know people want to learn but there is a difference between wanting to do it and learn and doing it the right way while being guided.
If you already know how to do the measurements and have all the proper tools that I would assume you would know that you will need to take the crank out to get checked and micro polished and then measured for the proper bearing sizes. Also if you have shavings in your pan then you more than likely have it through out the motor including inside the turbo as well. EVERYTHING needs cleaned out.