 over-pressurized case |
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| bd1308 |
 Jul 14 2005, 09:58 AM
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#1
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Sir Post-a-lot  Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501  |
runs great without oil filler cap. runs sucky with oil filler cap on. a bit overfilled (damn valvoline guy)....is this the reason?
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| 74914LE |
Jul 14 2005, 05:38 PM
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#2
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Member Group: Members Posts: 136 Joined: 6-April 04 From: Fort Worth, TX Member No.: 1,895 |
The topic caught my attention, because I once had the same issue.
Oil was blowing out of the crankcase, very much like you are describing. I tried everything to solve the problem. Breathers, checking pressure, and then the loud tapping started. It turned out that the #3 Exhaust Valve Guide had come loose. The Exhaust Valve was not seating properly, which caused the case to get pressure back through the push rod tubes, is the theory I came up with. You can check this by looking at the Valve Adjustment screws, as they will get hammered as the exhaust valve moves more freely in the guide. Eventually, the Valve Seat area will start to loose some aluminum, which will show up as a nice silver paste. When I pulled the head, the valve could be moved around in the new larger seat that the excess play had caused. Fixed the problem by replacing the head. My issue was with a 1.7lt. head, but it should not matter. |
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Posts in this topic
bd1308 over-pressurized case Jul 14 2005, 09:58 AM
Mueller better get out your tool box, a few more weeks and... Jul 14 2005, 10:01 AM bondo I nominate you for a V8 conversion. I bet we could... Jul 14 2005, 10:02 AM bd1308 sigh.....
mike, is the oil being overfilled the r... Jul 14 2005, 10:02 AM ArtechnikA what's "a bit" ? lots of AX guys run a qt ove... Jul 14 2005, 10:04 AM bondo On a more serious note.. I doubt it's overfill... Jul 14 2005, 10:06 AM bd1308 its carbed. i think its rings. how much air is sup... Jul 14 2005, 10:08 AM ArtechnikA Jul 14 2005, 10:10 AM Mueller single carb........
do you have a line going from... Jul 14 2005, 10:11 AM bondo I thought a PCV valve was supposed to be pretty mu... Jul 14 2005, 10:13 AM ArtechnikA Jul 14 2005, 10:13 AM bd1308 rich, IIRC the crankcase pressure has NOTHING to d... Jul 14 2005, 10:15 AM Headrage How do you know what the pressure actually is? Jul 14 2005, 10:16 AM ArtechnikA Jul 14 2005, 10:18 AM bd1308 theroretically what would happen if the oil was ov... Jul 14 2005, 10:19 AM Mueller Jul 14 2005, 10:24 AM bondo Jul 14 2005, 10:27 AM bondo You have a dipstick, right? I've had it as hig... Jul 14 2005, 10:29 AM bd1308 less than half inch Jul 14 2005, 10:31 AM mudfoot76 Jul 14 2005, 10:34 AM Joe Ricard <... Jul 14 2005, 10:34 AM Headrage Does this have anything to do with "How do I chang... Jul 14 2005, 10:36 AM bd1308 ... Jul 14 2005, 10:38 AM bondo <... Jul 14 2005, 10:44 AM bd1308 i really hate venting to atmosphere.....
motor ho... Jul 14 2005, 10:45 AM Mueller Jul 14 2005, 10:53 AM bd1308 <... Jul 14 2005, 11:02 AM gklinger IIRC the head vents are *intake* for fresh air int... Jul 14 2005, 11:17 AM Joe Ricard Jul 14 2005, 11:25 AM Rouser Jul 14 2005, 04:09 PM bd1308 enviro-nazis?? they dont exist anymore in KY... Jul 14 2005, 06:00 PM Rouser Jul 14 2005, 06:11 PM bd1308 what are you on? no emissions testing=no enviro-na... Jul 14 2005, 06:15 PM Mueller Jul 14 2005, 06:17 PM bd1308 a year ago, my county DROPPED emissions "smog" tes... Jul 14 2005, 06:18 PM bd1308 besides its a 74--rolling exemption....
and by th... Jul 14 2005, 06:19 PM SpecialK Jul 14 2005, 06:29 PM
rhodyguy drill a hole in the air filter top and connect the... Jul 14 2005, 08:34 PM |
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