Forum: Model A (1928-31)
02-12-2018, 08:27 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
Well it has been a month and i finally got the A back together. It sounds like a sewing machine now.. Much better than before. It is still pushing oil out of the cotter pin hole. The first time it...
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Forum: Model A (1928-31)
01-20-2018, 01:14 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
Yes, all bearings are babbitt. The rods are all between .001 and .0015.. I was pleasantly surprised. I have had this car for 5 years with probably 400 miles on it. Due to a recent drawn out move the...
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Forum: Model A (1928-31)
01-17-2018, 09:42 PM
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Replies: 41
Views: 8,455
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Forum: Model A (1928-31)
01-15-2018, 07:11 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
I spun the engine over with the head off and valves 2 and 6 stuck open. I aimed a flashlight in the intake. / exhaust port of each valve when the valve was in the closed position, and found that a...
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Forum: Model A (1928-31)
01-13-2018, 09:16 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
The #1 intake valve looks a bit better. You can see where it contacted the seat all the way around the valve. My calipers show the contact line varies from .030 " tp about .050" wide.. I like a...
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Forum: Model A (1928-31)
01-13-2018, 08:52 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
#1 exhaust valve and the ace of spades have alot in common. You can see where the seat made contact with the valve at one time, but it is not showing signs of recent contact.. Or it is burnt bad.
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Forum: Model A (1928-31)
01-13-2018, 08:43 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
I started disassembling the valves and got #1 valves out. The valve springs free height are both 3-9/32" tall +-, and the new springs are 2-15/16" tall. Searches on the web tell me that 2-15/16" is...
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Forum: Model A (1928-31)
01-12-2018, 07:44 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
Cylinder 4.. In case the picturs are in the wrong order, the number on the piston (1,2,3,4) represents the cylinder.
Notice how clean the pistons are.. I did not wipe them down.. That is how...
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Forum: Model A (1928-31)
01-12-2018, 07:42 PM
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Replies: 41
Views: 8,455
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Forum: Model A (1928-31)
01-12-2018, 07:40 PM
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Replies: 41
Views: 8,455
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Forum: Model A (1928-31)
01-12-2018, 07:36 PM
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Replies: 41
Views: 8,455
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Forum: Model A (1928-31)
01-10-2018, 09:20 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
I pulled the head tonight and have a valve with a small chunk missing out the side of it. So a valve job is next on the list. I also noticed that all of the exhaust ports were dripping wet with oil....
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Forum: Model A (1928-31)
01-07-2018, 08:36 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
I started up the ol' model A today to let it warm up before re-doing the compression and doing the leakdown test. It didn't leak a drop of oil out the rear main.. Yesterday it leaked a drop every...
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Forum: Model A (1928-31)
01-07-2018, 12:02 PM
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Replies: 41
Views: 8,455
Re: Interpreting Compression Test Results
I am in agreement with the bad rings, will do the leakdown test today to check the valves. Does the engine have to be hot to do a leakdown test, or can you do it cold?
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Forum: Model A (1928-31)
01-07-2018, 10:44 AM
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Replies: 41
Views: 8,455
Interpreting Compression Test Results
My 1930 model a had no oil leaks but had a water leak due to corrosion in the cylinder head water jacket. So i put a new Snyders 6.0 head on it, and because it is bored .125 over i got the correct...
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