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03-16-2014, 03:39 PM | #101 |
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Join Date: Feb 2012
Location: League City, TX
Posts: 220
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Re: Y Block Help Needed
OK, the engine is out and everything but the rotating assembly has been taken apart. Here's my initial observations while tearing it down.
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03-16-2014, 06:24 PM | #102 |
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Join Date: Feb 2012
Location: League City, TX
Posts: 220
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Re: Y Block Help Needed
#4 piston is out, but the rings weren't stuck like I was suspecting. However, the compression ring gap overlapped about 50%, so that should explain the leakdown for that cylinder.
I did a quick check on the bore and came up with 3.860", which can't be right. I don't have a bore gauge, so I have to do it with dividers and caliper, but that should be close enough for a rough measurement. I triple check, even changing calipers, but get the same reading. How could it be .110" over and be running .060 pistons? Could this be a 312? So I check and see the stock bore for a 312 is 3.800". Looking at McMaster's & Mummert's sites confirms that it's a 312. Casting number is ECZ-6015-C and it has ECZ main caps. The heads are the ECZ-G. |
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03-16-2014, 07:09 PM | #103 |
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Join Date: May 2010
Location: Star, MS
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Re: Y Block Help Needed
It looks like you lucked up.
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03-16-2014, 07:31 PM | #104 |
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Join Date: Feb 2012
Location: League City, TX
Posts: 220
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Re: Y Block Help Needed
Yeah, normally I do something that rhymes with that!
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03-16-2014, 08:45 PM | #105 |
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Join Date: May 2010
Location: MN
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Re: Y Block Help Needed
Pictures or it never hapened, ha ha.
Sounds like you have it pin pointed. Nice work! |
03-16-2014, 09:14 PM | #106 |
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Join Date: Feb 2012
Location: League City, TX
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Re: Y Block Help Needed
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03-16-2014, 09:19 PM | #107 |
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Join Date: Mar 2012
Posts: 39
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Re: Y Block Help Needed
THATS how the rings looked??? Wow
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03-17-2014, 02:25 AM | #108 |
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Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,779
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Re: Y Block Help Needed
Be sure to check ring gap with the rings in the cylinders. Someone may have used 292 rings so the gaps are huge. Normally it does not matter where the ring gaps are because the gap area is so small and the rings constantly rotate in their grooves anyway. So the gaps will all line up and then move on, not lining up. Doesn't affect how the engine runs at all. You need to be concerned more with how well the rings are sealing against the cylinder walls as well as the ring lands (check for side wear on the rings).
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03-17-2014, 08:20 AM | #109 |
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Join Date: Dec 2010
Location: p.e.i.
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Re: Y Block Help Needed
with the ecz caps you do have a 312 but its common to bore a 292 to that size.the wristpin is in the same location so no problem.whoever did your engine was no pro.
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03-17-2014, 10:00 AM | #110 |
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Join Date: May 2010
Location: Kingman Az. 86409
Posts: 419
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Re: Y Block Help Needed
X2 what 40 Deluxe said. Urban legend that it won't run correctly w/ the ring gaps lined up.
__________________
Dan Kingman Az. 86409 |
03-17-2014, 06:46 PM | #111 |
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Join Date: Feb 2012
Location: League City, TX
Posts: 220
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Re: Y Block Help Needed
Measured gap on one of the compression rings on the #4 cylinder and it's .025", which is in Ford's spec range of .010 - .027", so they are the right rings.
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04-12-2014, 07:21 AM | #112 |
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Join Date: Nov 2012
Location: Central Texas
Posts: 155
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Re: Y Block Help Needed
It's not unusual for the rings on a piston to be aligned once the engine has run for awhile. The rings do rotate normally and once the two compression rings align, they'll have a tendency to stay that way as it's the path of least resistance.
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