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Prep the motor before it goes to the machine shop? #1196216 03/13/12 03:47 AM 03/13/12 03:47 AM
Joined: Jan 2010 Posts: 1,944 woodcrest, CA magnum440d100 OP top fuel
magnum440d100 OP top fuel Joined: Jan 2010 Posts: 1,944 woodcrest, CA	The cam bearings in the 360 are shot. So instead of buying a cam bearing installation tool for $200 I am sending the block to the shop for oven baking (they don't "hot tank" anymore) and installing the cam bearings. I've heard the oven baking doesn't work AS well as hot tanking. I've already cleaned the block when it was assembled and painted it, but after I disassembled it I noticed spots I've missed. So should I scrub it again, and remove the gaskets that are stuck on?? Or does the oven baking work just as well?? What block prep work should I do before I send it off?? It's already disassembled to a bare block, but the main caps are reinstalled. I'm planning on reassembling it at the house. Should I be good to go??

Re: Prep the motor before it goes to the machine shop? [Re: magnum440d100] #1196217 03/13/12 08:44 AM 03/13/12 08:44 AM
Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O 70Cuda383 Too Many Posts
70Cuda383 Too Many Posts Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O	I thought the baking process would remove everything but rust. Try giving the machine shop a call and ask them what the oven bake DOES remove, or ask if they have a cold tank. my machine shop has both hot tank and cold tank. I don't know if the cleaning solvent is the same in both, and one is just heated up or if they use different solutions, but the cold tank was about half the cost of a hot tank dip, but it came out looking like a fresh cast block....so I don't really know WHAT the need for the more expensive "hot tank" would be! Photobucket sucks

Re: Prep the motor before it goes to the machine shop? [Re: 70Cuda383] #1196218 03/13/12 08:53 AM 03/13/12 08:53 AM
Joined: Feb 2012 Posts: 637 SoMd, USA 1 135sohc mopar
135sohc mopar 1 Joined: Feb 2012 Posts: 637 SoMd, USA	The traditional 'hot tank' has been all but put out of business by the EPA. Still have the 'dishwasher' but its not as good as the nasty stuff. Gets a majority of the funk off but not rust or paint. Thermal cleaning and blasting is the way to go. It gets everything so clean and nice, its like a fresh casting. http://www.youtube.com/watch?v=gb2vDg2Iu...mp;feature=plcp

Re: Prep the motor before it goes to the machine shop? [Re: 135sohc] #1196219 03/13/12 10:50 AM 03/13/12 10:50 AM
Joined: Jan 2003 Posts: 17,861 albany ny 0 05dakota I Live Here
05dakota I Live Here 0 Joined: Jan 2003 Posts: 17,861 albany ny	doesnt the blasting then require redoing the bores?

Re: Prep the motor before it goes to the machine shop? [Re: 05dakota] #1196220 03/13/12 11:28 AM 03/13/12 11:28 AM
Joined: Jan 2003 Posts: 74,992 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,992 U.S.S.A.	Quote: doesnt the blasting then require redoing the bores? Shot blasting changes all the machined surfaces , you would do this before all machining operations . You could make covers for certian areas if you don't want the machined surfaces touched , I made alum plates with holes when I had a block done that protected the deck surface , I didn't worry about the mains and the bores since those were going to be remachined . It also stress relieves the casting .

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