2nd Generation Specific 1986-1992 Discussion

Oil Leak From Iron

Old 03-13-2004, 02:56 AM
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since last summer i've had an oil leak that i was unable to locate. In the past week or so i stripped the engine down to almost bareblock and removed all the emissions and stuff. I know the leak is from under the oil filter so i figured it might be the sender for my oil pressure gauge or the seal under the pedestal. I am now dealing with the very real oossibility that i have the characteristic crack in the rear iron around the dowel pin. If this turns out to be the case, can i have a few beads welded over the crack or should i pull the engine and replace the iron completely? The engine is fine otherwise, just leaking oil which is not only making a mess, but not allowing me to run any track events this season.
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Old 03-13-2004, 08:17 AM
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Thats rough man. But I dont think that you should weld it up, prolly not the answer you want to hear. But I am no expert.
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Old 03-13-2004, 09:29 AM
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Iron replacement, followed by correct tuning to allevaite the cause of the plate cracking
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Old 03-13-2004, 11:04 AM
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yeah too much timing, or way too lean. bummer
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Old 03-13-2004, 11:04 AM
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What causes the cracks?
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Old 03-13-2004, 12:28 PM
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Originally Posted by ColinRX7' date='Mar 13 2004, 12:04 PM
What causes the cracks?
Originally Posted by j9fd3s' date='Mar 13 2004, 12:04 PM
yeah too much timing, or way too lean. bummer
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Old 03-13-2004, 12:38 PM
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just wondering how its possible to detonate enough to cause this crack and not blow a seal? It was my understanding that you pretty much had to blow a seal to see the kind of pressures necessary to cause this crack. My tuning isn't the best, but i have been running very rich overall and my timing map i got from david lane who has been running it with no problems for about 2 years.
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Old 03-13-2004, 12:44 PM
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I've seen a couple motors that detonated and broke the casting on the front iron where the oil feed line is. I dunno if you could weld it. The heat might warp the housing. Maybe jb weld as a temporary solution?
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