Re: Vacuum
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Thanks again! I too think the valves are sealing okay. I think I may have valves not fully opening causing a "small" misses sometimes when idling, which is a more pronounced when under load. A couple of videos for your viewing pleasure. In the slow mo video you can see that some of the lifters are not spinning like the rest....I wonder if those are the ones the problem ones? I do think the sounds is coming from cylinder 4 or 5. https://drive.google.com/file/d/1GZf0ACXKUmaV-AuCDse2kVwpmRDqPYTF/view?usp=share_link https://drive.google.com/file/d/1GP24x44QBN-ww6j8Tll6vkgHY_nT-PsD/view?usp=share_link
Posted on: 2023/4/18 10:29
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Re: Vacuum
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Thanks Fish'n Jim, I don't think it's way out, just looking to see what's "normal" for other 327's. I have some lifter issues, which are probably affecting the vacuum some as well. I'm waiting to see if the lifter issue is from sitting, that is sticky, or if they are worn and maybe the car was parked years ago with lifter issues.
Posted on: 2023/4/18 10:03
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Re: Noisy Lifters
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Hmmmm, more good thoughts. I hadn't considered the idea that valve recession could be causing my issue. My problem is I know nothing about my car's history. It's been parked for maybe 40 years and for all I know it was parked with this issue. So I've got Marvel in the oil and going to give it some time to see if maybe the bad lifters will clean up and come back to life. If not then I'll look at replacing lifters. I'm not sure how long to wait before determining that I need to replace lifters. And "if" I end up replacing lifters wouldn't it be prudent to replace the entire set while you're at it? If this was my daily driver this would be an annoyance! But, because it's my project car it's kinda fun to first solve the riddle and then to fix the problem.........maybe!
Posted on: 2023/4/17 17:17
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Re: Vacuum
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Good thoughts, thank you! I added Marvel last night, so hopefully that gets things freed up. I'll try playing with the timing a bit more and see what happens, might be a reason it was sitting at 15 BTDC before, although that seems excessive, but it may run better closer to 10. It's not "terrible" right now, but some more playing and I should be able to make it better.
Posted on: 2023/4/16 14:47
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Re: Vacuum
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Those are all good questions. I have been thinking it should be 3-4 higher as well. Gauge, possible it's not accurate. Yes, connected to manifold vacuum. Car is idling nicely, has a bit of a miss which I believe is being caused by a sticky lifter. Timing when I got the car was whacked, sitting about about 15 degrees, rolled it back to 6 as per the manual and have since adjusted it to 7 as it seems to run just a bit better. Car is new to me, but no indication that it's burning oil and oil stays super clean. Checking my gauge may be a good place to start.
Posted on: 2023/4/16 13:45
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Vacuum
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After tweaking and tuning I was able to improve the vacuum and 16 is as good as I can get. (Vacuum lines for brakes, pump, etc. all plugged.)
Vacuum is nice and steady, that is, needle does not flutter. Is this typical for a 327? *53 Cavalier with 70,000 miles. Attach file: Capture.PNG (621.43 KB)
Posted on: 2023/4/16 10:29
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Re: Oil Leaks
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Agreed! Other The booster piston and valve have small vacuum leaks the brakes are good! (Rebuild kit on the list.) The oil leaks seem to change the more I drive, I think they may actually be getting better, and my worst leak may be the shaft seal on the gear selector on the transmission.
Posted on: 2023/4/16 10:19
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Re: UPDATE!
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So in the end it was a leaky line that was allowing air in the system? This was on the suction side of the fuel pump? Still no fuel issues since?
Posted on: 2023/4/16 10:08
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Re: Noisy Lifters
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My '53 Cavalier has a noisy lifter, I think just one, which I'm hoping is going to clear up. The car is new to me and has been in storage for many years, although I don't know how many, maybe as many as 40 years or more.....I'm still trying to track down the history of the car.
After getting the car running again I gave it a fresh oil change using Lucas 10-40 high zinc and Lucas Heavy Duty Oil stabilizer. The fresh oil change seemed to quiet the lifter a bit....Yesterday I added some Marvel Mystery Oil as well and we'll see if that frees things up. Since getting the car running I've put on 60 miles plus a bunch of idling while tuning/checking the engine. I'm thinking that I will pull the covers and see it if I can determine just which cylinder has the sticky lifter (guessing it's 4 or 5) The oil was very clean when I got the car and the new oil is still super clear . So, I don't suspect the lifter problems are due to dirty oil, but rather maybe a build up of varnish. Any thoughts or advice would be appreciated!
Posted on: 2023/4/16 9:57
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