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Re: Manifold colour & gaskets
#51
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53 Cavalier
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Quote:

TxGoat wrote:
If the engine will run with near zero compression on one cylinder due to a piston/ring issue, it should be puffing at the oil filler cap.


I initially thought the same, and the lack of that puffing made me think that maybe I did have a valve issue. But that "puffing" isn't apparent because of the road draft tube. I plugged it for my leak down test.

Posted on: Today 16:54
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Re: Manifold colour & gaskets
#52
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53 Cavalier
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Quote:

TxGoat wrote:
Ah... that clarifies it. Mickey Mouse has somehow become trapped in your crankcase.


I need larger mouse traps!

Posted on: Today 16:57
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Re: Manifold colour & gaskets
#53
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Pgh Ultramatic
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Quote:

53 Cavalier wrote:
Quote:

Pgh Ultramatic wrote:
Put 1 tbsp of engine oil a cylinder. Then after maybe 20 seconds or something compression test it again and let's see those numbers.

If they are essentially the same as before then you have valve issues.

If they are significantly improved then you have ring issues.


I did that right after my initial compression test, and then pressured up each cylinder to confirm.

1-90/96
2-89/120
3-76/90
4-9/16
5-78/88
6-45/55
7-65/89
8-86/96


Definitely looks like a valve issue on the problematic ones. For some of the others that give a large difference, I would attribute that to cylinder wear.

Posted on: Today 17:38
1955 400 | Registry | Project Blog
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