Machine shop time, How many hours to prep case, crank, bearings? |
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Machine shop time, How many hours to prep case, crank, bearings? |
Phoenix914 |
Sep 17 2020, 06:21 PM
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#1
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Member Group: Members Posts: 389 Joined: 6-December 06 From: Oviedo, FL Member No.: 7,322 Region Association: South East States |
Greetings All!
I just recently dropped off my 2.0 (GA) case and 71mm crankshaft to get checked at a local machine shop in preparation for a rebuild. Today they called and said for align bore, decking the registers, polishing the crankshaft, and mocking up the assembly with fitted and numbered main bearings it would be 30 hours of work. Does that sound reasonable? It's honestly a lot more than I expected and will add $$$ to my budget for this rebuild. Should I look for another case, maybe a 1.7, that is in better condition or has already been prepped? I'm not an expert builder and some things are worth paying for, but man that's a lot of money! Thanks for any advice! |
mepstein |
Sep 17 2020, 06:30 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,271 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Does it need all that stuff? Does it not measure to spec or are you asking to have it done just to be sure. When I worked at the shop, micro polishing a crankshaft was ~$200-250. We generally didn’t align bore or deck the registers on the aluminum cases unless they were out of spec and tried not to rebuild mag cases unless there was a strong reason too. We only worked on 6 cylinder engine.
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Phoenix914 |
Sep 17 2020, 06:58 PM
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#3
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Member Group: Members Posts: 389 Joined: 6-December 06 From: Oviedo, FL Member No.: 7,322 Region Association: South East States |
Does it need all that stuff? Does it not measure to spec or are you asking to have it done just to be sure. When I worked at the shop, micro polishing a crankshaft was ~$200-250. We generally didn’t align bore or deck the registers on the aluminum cases unless they were out of spec and tried not to rebuild mag cases unless there was a strong reason too. We only worked on 6 cylinder engine. When I dropped the case off, I asked to have it checked for needing an align bore and registers decked. Today, the guy told me it needed those services. I have to trust the shop and their expertise, but I'm wondering if their time estimate for the work is in the ball park. From what I've read, GA cases typically have fallen registers and have to be decked, so that's no surprise. The align bore...I don't know (IMG:style_emoticons/default/confused24.gif) |
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