Head rebuild problem, Is this guy a dick head? |
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Head rebuild problem, Is this guy a dick head? |
DavidSweden |
Jan 4 2015, 05:56 PM
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#1
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Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
I am rebuilding my engine a 2.0 from 76. I took the heads in to be reconditioned.
The machinist told me that the valve stems needed replacing, the valves needed regrinding and the seats machined. He said this would be no problem. He know tells me that the new valve stems are not at the same angle as the originals and after machining the seats the valves sit too low in the valve seats. He says new valve seats are required As you will understand I am not happy especially when he reassured me that he could do the job no problem. Is this guy incompetent dick head or is this a common problem,? Appreciate feed back before I go to the shop on Wednesday. |
veekry9 |
Jan 5 2015, 10:25 PM
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#2
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OldMember Group: Retired Members Posts: 3,068 Joined: 17-June 13 From: TO Member No.: 16,025 Region Association: Canada |
Yes,the relaxing of strength as a consequence of elevated temperature,both the spring and alloy head.
A RR Phantom III head.Staked. Threaded valve seats is another of RR's innovations for reliability. An expensive method of machining,but certain. Not sure if any round engine makers made similar seats,anyone here with P+W experience? http://www.sl113.org/forums/index.php?topic=8028.0 https://www.roushaviation.com/repairstation...nprocesses.aspx Incredibly expensive process for approval. |
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