June 17, 20204 yr comment_601361 Just now, Zed Head said: 2nd edit, actually a post...just curious. I wonder if people could pop their caps and see if they have rubber on there. To CO's last post's point. Just one of those curiosities. TBH I didn't know there was supposed to be a gasket there either. The gasket seems to be NLA though... Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601361 Share on other sites More sharing options...
June 17, 20204 yr comment_601363 I have one on my cap. It's a black washer and if you poke at it with a screwdriver tip you can see that it's not quite as hard as the plastic cap, but it's pretty hard. Maybe 1/16 inch thick? ID is a snug fit on the threads, and the OD is about the same size as the raised boss on the valve cover? I don't know how compliant they were when new so I don't know if it was always that hard, but I suspect it was slightly more compliant years ago. Every Z I've messed with has had one. I think you might just be not realizing it's there. It's really easy to mistake it for "part of the cap". I'll take a pic tomorrow if someone doesn't beat me to it. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601363 Share on other sites More sharing options...
June 17, 20204 yr comment_601364 4 minutes ago, Captain Obvious said: I think you might just be not realizing it's there. Nope. I looked closely because I thought that there should be one. Then I thought "what a fine piece of engineering and manufacturing". The reality is that they didn't need one there, as shown by my leak-free cap. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601364 Share on other sites More sharing options...
June 17, 20204 yr Author comment_601365 I saw this image before and looked at my cap. Mine looks like one piece. I thought about poking it with a screwdriver. I need to take another looks at it. I see a little oil around the cap, and was thinking about getting a more pliable seal. The seal on my 240Z is more obvious. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601365 Share on other sites More sharing options...
June 17, 20204 yr comment_601368 I got one, thought it was part of the cap, pretty hard, but it def is a separate piece. the drawing make it look wider than it is. Edited June 17, 20204 yr by Dave WM Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601368 Share on other sites More sharing options...
June 17, 20204 yr comment_601381 Right. It's easy to mistake it for part of the cap. Here's some pics. Cap, as it's normally seen: Close up of the seal in-situ. Looks like all one piece: But in fact, it's not. Used a thin blade to get a little separation and get things started, and the seal comes off. Note the step on the seal and the recess on the cap. Speculation on my part, but I bet the earlier seals (with the different part number) didn't have that feature: And here's a close-up of the cap with the seal removed. You can see the recessed area for the step. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601381 Share on other sites More sharing options...
June 17, 20204 yr comment_601382 Could be I missed it. I sold the car so can't check. How does it seal without the rubber piece? Did you try it? Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601382 Share on other sites More sharing options...
June 17, 20204 yr Author comment_601385 Mine looks like the last pic, with the seal remove. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601385 Share on other sites More sharing options...
June 17, 20204 yr comment_601386 The seal on mine is in the valve cover. Car is 12/70 date. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601386 Share on other sites More sharing options...
June 17, 20204 yr comment_601388 46 minutes ago, w3wilkes said: The seal on mine is in the valve cover. Car is 12/70 date. Ditto, 10/70 build date. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601388 Share on other sites More sharing options...
June 17, 20204 yr comment_601391 now I have to check the valve cover. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601391 Share on other sites More sharing options...
June 18, 20204 yr comment_601407 9 hours ago, Bigz Zee said: Mine looks like the last pic, with the seal remove. Yeah, then yours probably petrified and fell off some time in the past. And for the guys with the O-ring style built into the valve cover, I guess that's the older style. according to the documentation, they changed over to the newer style in 71. Link to comment https://www.classiczcars.com/forums/topic/64140-75-280z-starts-and-runs-shuts-off-after-30-60-minutes/?&page=4#findComment-601407 Share on other sites More sharing options...
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