 Dropped intake seat, Made a mess. |
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| TrailerParkBoy |
 Mar 13 2023, 09:54 AM
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#1
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Newbie  Group: Members Posts: 8 Joined: 7-February 23 From: PNW Member No.: 27,145 Region Association: Pacific Northwest  |
Intake seat let go. Ended up resting at angle to valve (odd location, usually they sit flat if loose?) which ended up taking a chunk from top of piston and scuffing cam lobe from pressure created. Much work ahead of us this weekend :-(
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Replies
| emerygt350 |
Mar 15 2023, 06:57 AM
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#2
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Advanced Member Group: Members Posts: 2,892 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Again, reminds me of the importance of AFR and CHT gauges in these cars.
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| Superhawk996 |
Mar 15 2023, 08:35 AM
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#3
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914 Guru Group: Members Posts: 7,055 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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QUOTE(emerygt350 @ Mar 15 2023, 07:57 AM)  Again, reminds me of the importance of AFR and CHT gauges in these cars. Proper tuning will do. I’m not against technology but setting timing properly and reading plugs goes a long way, doesn’t cost much, and doesn’t require exhaust mods and wiring. If technology is wanted to prevent this, need to start looking at knock sensing. On almost every modern vehicle. One of the problems with air cooled engines is all the noise they emit. Very easy for someone not familiar with knock / detonation to think it is a “normal” noise that air cooled engines make. Detonation kills engines fast. What do the other pistons look like? |
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Posts in this topic
TrailerParkBoy Dropped intake seat Mar 13 2023, 09:54 AM
Root_Werks Oops! Yup, doesn't look good, probably di... Mar 13 2023, 10:14 AM dr914@autoatlanta.com time for two new heads, these things are now 50 ye... Mar 13 2023, 11:25 AM r_towle That looks wrong in a few ways.
Valve,,, obvious
T... Mar 13 2023, 01:59 PM brant Looks like it could of been lean as mentioned
Too... Mar 13 2023, 02:54 PM 914sgofast2 The top of that piston looks really bad. Did you ... Mar 13 2023, 03:42 PM r_towle It’s possible that detonation may have caused th... Mar 13 2023, 04:08 PM TrailerParkBoy Thank you for the eye. Great questions. I’ll gra... Mar 13 2023, 06:28 PM r_towle What budget do you have?
I think AA makes new head... Mar 13 2023, 06:37 PM brant I’m guessing it was not running right ? Mar 13 2023, 07:04 PM
TrailerParkBoy
I’m guessing it was not running right ?
Yes, ... Mar 14 2023, 09:38 AM Brett W Be interesting to see if the rod bearings are beat... Mar 13 2023, 08:30 PM Superhawk996
The tops of the piston have all the hallmarks of ... Mar 14 2023, 06:01 PM gnomefabtech Looks to me like that valve seat did a dance in th... Mar 14 2023, 11:04 AM gandalf_025 I had an intake valve seat drop in a Corvair Turbo... Mar 14 2023, 11:15 AM bludden Happened to me a week and a half after I bought my... Mar 14 2023, 06:20 PM majkos1 engine original fuel injection or carb? Mar 15 2023, 07:08 AM technicalninja
Again, reminds me of the importance of AFR and C... Mar 16 2023, 02:17 PM rjames Agree that a wideband sensor is important, especia... Mar 16 2023, 03:38 PM gnomefabtech How do the other cylinders look? It's possibl... Mar 16 2023, 10:08 PM TrailerParkBoy Pulled it apart and this is what we found, remembe... Mar 20 2023, 10:17 AM gnomefabtech Dayum! That's a crazy failure. Mar 20 2023, 07:18 PM r_towle Lean, detonation evidence on the other cylinder.
W... Mar 20 2023, 07:38 PM Dave_Darling That looks depressingly familiar.
Could be caused... Mar 20 2023, 10:05 PM |
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