 Pulling the engine apart-PHOTOS TOO, Where do I stop? |
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| silver74insocal |
 Oct 14 2010, 10:28 PM
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#21
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Senior Member  Group: Members Posts: 736 Joined: 26-November 09 From: rancho cucamonga Member No.: 11,073 Region Association: Southern California  |
QUOTE(sean_v8_914 @ Oct 14 2010, 09:24 PM)  thats a pig-rich oil burper. those heads are damn near virgins. still have the casting boss around thr holes. valves look a little deep is that a crack on the left hole from plug to exh valve? "thats a pig-rich oil burper" can you dumb it down a notch for us non-technical people? (IMG:style_emoticons/default/laugh.gif) |
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| sean_v8_914 |
Oct 15 2010, 08:27 AM
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#22
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
heavy black carbon deposits suggest too much fuel delivery
wet appearance may indicate that the oil control rings are not working are the cylinder walls scored? can you feel the marks with your finger nail? |
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| sean_v8_914 |
Oct 15 2010, 08:30 AM
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#23
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
the raised ring on teh head that surrounds the piston hole gets shaved down after many rebuilds on the heads. these may have had 0-1 rebuild ever done
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| HAM Inc |
Oct 16 2010, 08:09 AM
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#24
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
The heads will need at a minimum news seats, guides, valves, springs, and ex. studs and machine work. They will liekly need some welding too as the 2.0 914 with no cracks is a rarity.
Deck the case while you're at it. I've decked a LOT of T4 cases over the years and I have NEVER had one in the mill that didn't have at least one spigot that wasn't out enough to warrant the proceedure. Most have multiple sagging spigots. Take your time and do the build right the first time. If money is an issue set it aside until you have the funds to do it right. You'll be glad you did. Some engines are a bit forgiving to cutting corners. The T4 isn't one of them. |
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| Jake Raby |
Oct 16 2010, 09:41 AM
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#25
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
GA cases are my least favorite.. I'll take a W, EA or Ec case over two GA cases.. I will state that the earliest GA cases do have the reinforced registers that I prefer.
Those chambers are contaminated with both fuel and oil deposits.. If the engine was running rich the ring seal could have been compromised by the fuel, because fuel is a solvent, not a lubricant.. This causes the rings to allow oil to bypass them and contaminate the chambers. I see one piston that looks like it could have been tapping against the cylinder head, if thats the case you'll be finding a bad rod bearing very soon upon further teardown. Engine looks typical at this point. These machines are approaching 40 years of service, the days of half ass rebuilds and corners being cut have been over for a long time. |
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