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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,555
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Can the heads be rebuilt with basic tools? Can it be a DIY job?
Just wondering if anyone has attempted to rebuild their heads themselves...im searching but not finding a decent thread.
Thanks!
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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10-22-2013, 08:06 AM
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Depending on the condition of your heads ,which in itself requires a great deal of previous head rebuilding experience ,you need a machine shops tools . I think the answer is that you can't do it with wrenches and screwdrivers.
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10-22-2013, 08:15 AM
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Always Be Fixing Cars
Join Date: Nov 2012
Location: SE CT
Posts: 1,629
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Removing the springs/valves just takes a spring compressor. Pressing in/out guides, seats, lapping valves, measuring everything and most importantly, resurfacing the mating surfaces would be far far more involved. I would most certainly not attempt this. My heads are presently being fully rebuilt. I supplied the remainder of the labor to get them on/off the car.
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'91 964 C4 - New Daily '73 Alfa GTV - 90% done 50% to go '65 912 - Welding in process |
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10-22-2013, 08:36 AM
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Heads require a machine shop to grind the valves, valve seats, remove/install valve guides and set valve install height.
Assembly and disassembly can be done with a few special tools that aren't expensive or hard to come by (ie valve spring compressor).
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'80 RoW 911 SC non-sunroof coupe in Guards Red It's not a Carrera.... It's a Super Carrera! |
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10-22-2013, 08:39 AM
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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,555
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i just remember a friends uncle who was somehow working the valves in an old ford back in the day. Like warming your hands with a suction cup thingy on the valve. I guess that was lapping the valve... for some reason, there arent too many threads on the actual process for 911's.
I've currently taken on a project motor that has been disassembled for head stud replacement but never put back together. the PO believes the motor had 92,000 miles on it. How many miles are these heads good for and what are the drawbacks if the heads have been sitting in a box for 10 years? can anything dry-rot in there? I was hoping to clean these up and install without having to get them rebuilt. I guess I need to get more information on how to inspect the heads while everything is laid out. any links appreciated.
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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10-22-2013, 10:11 AM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,514
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35 years, you need a valve job. Guides are usually gone before 90K, all 12 of them. See it all the time and guides are the weakest point of the original heads.
Bruce |
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10-22-2013, 10:42 AM
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Registered
Join Date: Nov 2000
Location: Manchester, NH
Posts: 268
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Can you - yes. All the tools are readily available to do it at home. Is it worth it? No. You'll spend more money buying the tools than having someone do it. Plus, it's one of the situations that if you have to ask the question, you shouldn't be doing it.
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10-22-2013, 10:53 AM
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Red
