Mark Maras Posted July 16, 2019 Share #133 Posted July 16, 2019 I wouldn't spend too much time trying to make sense of the PO's thought processes. They might start to make sense. That said, have you searched the top and the bottom of the block for the reference stamps that show the block's orientation in the car? 1 Link to comment Share on other sites More sharing options...
Captain Obvious Posted July 17, 2019 Author Share #134 Posted July 17, 2019 Haha!! I didn't see stamps on the block for that, but I did see a stamp in the head "F". Here, you can see it to the left of the plug I put in up by the thermostat housing. I'm trying and trying to convince myself that it does not mean "Front": Link to comment Share on other sites More sharing options...
Captain Obvious Posted July 17, 2019 Author Share #135 Posted July 17, 2019 So my valves were indeed AFU. Based on the wear patterns, they were all mixed up, and most of them were not sealing properly. One of the exhausts (4E) was even bent a little and not sealing for squat!. And I can tell by looking at the wear patterns and carbon traces that it's been like that for quite some time. Probably since my PO messed with it. It definitely did NOT just happened when the cam snapped. Today's progress was I got all the exhaust valves sorted out. As best I could, I matched the correct valves to the correct cylinder and lapped them into place. Thankfully I have a set of set of valves at my disposal that I stripped out of an N47 years ago. I saved them, because that's what we do. They were sitting on the shelf, and thankfully I've got 24 valves from which to pull the best 12. So exhausts are done and (barring surprises) I think the intakes will be much easier since they are in way better shape. 3 Link to comment Share on other sites More sharing options...
240260280 Posted July 17, 2019 Share #136 Posted July 17, 2019 1 Link to comment Share on other sites More sharing options...
Dave WM Posted July 17, 2019 Share #137 Posted July 17, 2019 HR puff and stuff / Sesame st were big with the heads in HS... Link to comment Share on other sites More sharing options...
Captain Obvious Posted July 17, 2019 Author Share #138 Posted July 17, 2019 Three lids! One. Two. Three. Haha!!! Link to comment Share on other sites More sharing options...
Dave WM Posted July 17, 2019 Share #139 Posted July 17, 2019 how are the guides? I was messing with my N47 and noticed I had NO play on the intake, some on the exhaust. Just wondering if exhaust typically show more wear. Link to comment Share on other sites More sharing options...
grannyknot Posted July 17, 2019 Share #140 Posted July 17, 2019 7 hours ago, Captain Obvious said: One of the exhausts (4E) was even bent a little and not sealing for squat!. And I can tell by looking at the wear patterns and carbon traces that it's been like that for quite some time. Probably since my PO messed with it. It definitely did NOT just happened when the cam snapped. Once you sort out 12 good valves are you going to get the valve seats re cut? Link to comment Share on other sites More sharing options...
Captain Obvious Posted July 17, 2019 Author Share #141 Posted July 17, 2019 No. That's exactly what they would they expect me to do. What I'm doing instead kinda goes like this. Under magnification and with the use of some sharpie marks on the sealing surfaces, I've tried to match up the correct valve with the correct cylinder. And then after that, I'm lapping them to match the seats. For example... Here's one of the seats before I've done much of anything to it. The valve that WAS in this location wasn't even close to making contact on most of the seat. I managed to find one of the other exhaust valves that was pretty close. Here's what I'm starting with: Here's my handy-dandy valve lapping "tool". I use double back sticky tape to hold the valve to the "tool": Some 800 grit lapping compound: And I work the pair: until I have something like this. Smeared contact markings over the entire seal: Yes, there are still a few pits on the valve seat, but I'm not looking for perfection here. I'm just looking to be able to drive a little bit more on this engine until I finish the F54/P79. What I'm ending up with is 1000 times better than what I started with!! 3 Link to comment Share on other sites More sharing options...
Captain Obvious Posted July 17, 2019 Author Share #142 Posted July 17, 2019 11 hours ago, Dave WM said: how are the guides? I was messing with my N47 and noticed I had NO play on the intake, some on the exhaust. Just wondering if exhaust typically show more wear. All of the valves wiggle a little bit, but yes, I've found that the exhausts wiggle more than the intakes. I'm not going to measure them, because then I'd know. I did measure the lengths of all the exhaust valves though, and found one that was twenty thousandths shorter than the rest. No idea why it's like that, but that one did not make my set of the six best exhausts. 1 Link to comment Share on other sites More sharing options...
Dave WM Posted July 17, 2019 Share #143 Posted July 17, 2019 (edited) I can't imagine you letting the wiggle go un measured.... :) snorkle need a procedure. If you come up with something I will try as well. I suppose a way to measure the bore would be best a series of go no/go round gauges would be best for the bore. Edited July 17, 2019 by Dave WM Link to comment Share on other sites More sharing options...
Dave WM Posted July 17, 2019 Share #144 Posted July 17, 2019 Link to comment Share on other sites More sharing options...
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