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On 30 Apr 2003 at 8:46, Martinez, Leon wrote: > I guess the only thing I can account for damage, is a foreign > object though the intake or pinging, knocking or pinking , > whatever you prefer to call it. If there was a foreign object in there you would see dents in the head, too. Are there dents there? Was the hole in the piston melted (rounded edges) or broken (sharp edges?) > Also the total seal piston ring or the top ring might have > broken and accounted for the foreign object. Is the broken area also down the side of the piston and into the ring area? > If it was a piston ring that broke and caused the piston damage, > why would a ring break ? I hear that knock will break rings, but I don't know why. > I will only replace the pistons cylinders and rings. You will probably need to open up the whole engine anyway to clean out any piston debris that ended up in the sump. it's also a good idea to inspect the pump and clean out the oil passages because some of the smaller alum particles can get past the filter screen. > I have just purchased a Kolbenschmit kit at the local VW parts store, > the kit includes pistons, cylinders, rings, pushrod tubes and > a full gasket kit for 129 bucks . KS (along with Mahle) was one of the OEM suppliers of pistons and cylinders for our cars. The quality was certainly good then; I don't know if it still is, but this sounds like a good price. > Though undamaged , both of my heads need replacing because > I did a bad thing, when replacing heads, one is still the > the infamous MOFOCO head with big valves and the other is > the Mexican VW dealership head with valves so small they look > like they came from a lawn mower. This might have been part of your problem. > My last compression as of last week was 110 lbs on #1 115 lbs on #2 > 120 lbs on # 3 and 50 lbs on the broken #4 cylinder. This is very good for > 70,000 miles on these items, but will be replaced. Well, 50 lbs certainly sounds poor for only 70k. Was this before or after your failure? > Hopefully i will not break my car again and will promise to my engine > to only use premium fuel Higher octane is only useful if you have higher compression ratios, but you may well have had high compression on the left side, where the failure occurred. your numbers above tend in this direction, except for #4, which has already started to fail. > After I fix the car, I will paint it the most annoying color I can find, > maybe tweety bird yellow , any suggestions for the maximum annoying color ? Now THAT's a really loaded question. I was almost ready to answer when I realized that I couldn't do so without offending someone.... -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org