Posted by Shawn MacAnanny on November 20, 2011 at 15:12:00 from (75.105.200.204):
Ive done quite a few jobs, even on my duramax. Here are a few tricks ive done that save time and mess.
Coats everything once a day for a couple days prior with PB blaster
Unhook lower radiator hose to drain, then thermostat housing. vacuum from lower hose and remove all coolant from head and passages so it wont get in your cylinders
xylene and razor blades are the best way to clean head surface
If you will be leaving head off for a while, outside, clean it all up, and coat cylinders, and block surface in ATF then apply a couple layers of Saran wrap, will keep cylinders and block surface from getting any surface rust.
When you are ready to reinstall head use same shop vac around each head bolt hold and blow hole out with air gun, the shop vac will keep the debris and ATF from blowing all over the other surfaces
If bolts are hard coming out i will get a bolt same thread as head bolt, cut a groove in it, then chase the threads and blow them out again. you dont want to use a tap as it will remove excess thread material.
I soak all pushrods, lifters, rockers in xylene or diesel fuel then in oil before reinstall
I second having head done by a shop. I paid $160 for my shop to mill and recut valves and new seals on the last head i had for a backhoe. money well spent.
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