Cylinder Heads

[SS MAYFLOAT]

I think I know what the difference is between "Rebuilt and Remanufactured" is, but would like to know what your description is. Thanks

 

[one more cast]

Re: Cylinder Heads

I believe a remanufactured head would have all new valves,springs,guides ... as where a rebuilt head may not. Just my thought on the subject.

 

[TilliamWe]

Re: Cylinder Heads

I agree OMC. I had a vortec head "rebuilt", and they used some valves from my other head.

 

[Bondo]

Re: Cylinder Heads

Ayuh,..........<br /><br />Rebuilding is replacing the Bad parts,............<br /><br />Remanufacturing is Replacing All the Replaceable Parts...........

 

[QC]

Re: Cylinder Heads

I don't agree. Rebuilding is what you guys are stating, but remanufacturing is the same thing on a more assembly line and quality controlled type process.<br /><br />For example: a Caterpillar dealer mechanic can rebuild a cylinder head in a shop or he could install a remnufactured cylinder head built at a plant designed for remanufacturing. In either case you could see a combination of new and re-used parts depending on how they looked at inspection. In the case of a reman you would probably get reused valves from a big bin and in the rebuild they would be yours if they were reused. My .02 . . .

 

[SS MAYFLOAT]

Re: Cylinder Heads

Thanks guys, that is pretty much what I have been led to believe.<br /><br />So if an OHC head was rebuilt, it problably had the existing valves ground, new seals, valve springs checked for tolerances, and replaced with new parts or other used parts.<br /><br />Then if it was remanufactured, It would have been completely gone through such as the cam journals line bored, new valve guides/seats, new valves/springs and seals.<br /><br />So is the extra price for a reman worth paying for over the rebuilt?

 

[SS MAYFLOAT]

Re: Cylinder Heads

Ahhhh, stupid me, I forgot to mention about the head bolts. The ones I took out (dodge 3.5 twin cam) looks in great shape. Is it really necessary to put in new ones? I have them pushed into a cardboard box in the order in which they came out.

 

[Reel Poor]

Re: Cylinder Heads

Yes it is necessary to replace them. They are touque to yeild bolts and are designed to streach. Reusing them can/will result in broken bolts or insufficent torqe.

 

[one more cast]

Re: Cylinder Heads

Absolutely what Reel Poor said.

 

[TilliamWe]

Re: Cylinder Heads

SS, regarding those bolts, do a search in the Mercruiser section, they have been discussed several times.