Rob also mentioned these: http://www.timesert.com/ > -----Original Message----- > From: Walter Coe [mailto:Whalt@xxxxxxx] > Sent: Wednesday, July 09, 2003 5:32 PM > To: DMCForum@xxxxxxxxxxxxxxx > Subject: Re: [DMCForum] The head and rolling the dice > > > Now Walt, you said you had success welding the head. Where did you have > to > > have it repaired? Is this head on a car? > > This wasn't the head. It was the crank case block. Just forward of the > water pump on top of the block there are two plugs. The casting around > the > smaller one (same as the oil drain plug) got a hair line crack. This > happened when the owner's brother was driving it about a mile from home. > Smoke started pouring from the engine. It was obviously oil burning on > the > muffler, so the guy drove it home. It lost about a quart of oil. > > I tried soldering it with brazing rod and a torch, but the alloy just > wouldn't stick. I ground off what was left of the nipple. Then the > professional weldor turned that into a neat flat area. Now that I've > jogged > my memory, it took two trips for the weldor. The first time he didn't > weld > the whole crack because he couldn't see how far it went. We thought it > was > only the nipple that cracked, but it was also the area around it. The > second time he welded all the crack and then welded a plate across the > whole > top of the engine. The only reason for the plate was to keep crap out of > the casting voids. That was the owner's idea. This car is still running > strong. > > Rob Grady has warned me before about drilling too deep on exhaust manifold > studs. It sounds like you only drilled into a coolant passage way. If > that > were my problem, I would drill & tap the hole and put a set screw in the > bottom with plenty of red loc-tite. I would use a set screw with an allen > head if I could find one or just cut the head off of a bolt and slot the > end > so I could get a screwdriver on it. The only problem with this idea is > that > the plug you use can't be any larger than the tap for the thread repair > kit. > Ideally the plug should be the same size & thread, but that may be a > bastard > size. Yes, this is an appropriate use of the word bastard -- in this > sense > it means odd-ball, unusual, one-off/custom. I wouldn't trust a thread > repair kit to hold back coolant. I wouldn't trust any epoxy either. > > Can a weldor reach the inside to repair it from the back side? Probably > not. It is a very deep hole to repair from the outside especially since > you > have to drill & tap a new hole in the middle of it. And then the gasket > surface could get messed up. How far did you have to drill to get through > the block? > > I say put a plug in it -- you have a reputation for being good at plugging > your tail pipe anyway. ;-) > > Walt > > > > To unsubscribe from this group, send an email to: > DMCForum-unsubscribe@xxxxxxxxxxxxxxx > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=251812.3170658.4537139.1261774/D=egroupweb/S=170512 6215:HM/A=1652964/R=0/SIG=11t2ts2ch/*http://www.netflix.com/Default?mqso=6 0178276&partid=3170658> click here <http://us.adserver.yahoo.com/l?M=251812.3170658.4537139.1261774/D=egroupm ail/S=:HM/A=1652964/rand=319550018> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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