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| Lapping in slant six valves https://www.slantsix.org/forum/viewtopic.php?t=55486 |
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| Author: | 1930 [ Sat May 31, 2014 6:27 pm ] |
| Post subject: | Lapping in slant six valves |
I am looking for a complete step by step procedure for lapping the valves in on my slant head. I was pointed to this post http://www.slantsix.org/forum/viewtopic.php?t=14394 but it does not go into any detail on what specific compounds are used when. Doing a search on-line there are many different grits avail. I have also found mention of ways to test the valves sealing quality's to make notation first of any that may need special/extra attention. Does anyone know of a good step by step that covers all the details in rejuvenating one of these heads. Id hate to say to myself later ...if I only knew I would have done that. Thanks |
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| Author: | 1930 [ Sun Jun 01, 2014 4:29 am ] |
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| Author: | 1930 [ Sun Jun 01, 2014 4:34 am ] |
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Can someone tell me the first year that hardened valve seats were introduced on the slant? |
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| Author: | Sam Powell [ Sun Jun 01, 2014 5:11 am ] |
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My understanding is that mid way through the 72 year production Mopar began induction hardening the valve seats. I had a '72 Duster that never needed head work in 130K miles. My '69 Dart was toast after about 70K. Sam |
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| Author: | 1930 [ Sun Jun 01, 2014 6:00 am ] |
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Quote: My understanding is that mid way through the 72 year production Mopar began induction hardening the valve seats. I had a '72 Duster that never needed head work in 130K miles. My '69 Dart was toast after about 70K.
I thought 72 was the magic # but seeing how they went with electronic ignition is 72 as well I thought that maybe I was confused. Thanks
Sam |
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| Author: | CNC-Dude [ Sun Jun 01, 2014 8:31 pm ] |
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What is your intention with lapping the valves? Lapping is not meant as an alternative to a valve job for worn valve seats, guides or valves. It is only for lightly scuffing the valve seat face on the valve and head to verify full contact around the entire perimeter of them. Lapping with too much pressure and/or too coarse of a grit can ruin a good valve job, so make sure you are doing this for the right purpose. |
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| Author: | 1930 [ Mon Jun 02, 2014 2:38 am ] |
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Got it, thanks for the warning. Intention is to get a spare engine running, educational purposes only |
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