[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
----- Original Message ----- From: <BOB2TYPE3S@aol.com> > I've never heard of them, so you might be on your own here. Most people just > put in stainless steel exhaust valves and call it done. These are forged stainless and I checked the stems and they are very hard- couldn't scratch them with a carbon steel sabtier knife so I guess they are chromed. They look a quality item except they don't have any nice stamped logo at the end! > I've never broke an intake, but I have broke 2 exhaust valves on 2 beetle > engines. These both broke while at highway speed running cheap gas though. I > didn't have any idea how many miles were on either engine. When the valve head > broke off the first engine it made a big mess inside, breaking the cam and the > rod in several places, along with shattering the piston, but it never leaked a > drop of oil. The second one was less violent, only shattering the piston, > bending the rod, and breaking a lifter bore off. The first engine got rebuilt and > had over 27,000 miles on it when I sold it in a car last fall, and the second > one is now only used as a mock up case. I hope this helps. > Nasty! Did they give you any warning of imminent doom? did the valve lash tighten up prior to the destruction? I heard that they always do and that at the first sign of a tightening valve you should monitor the situation carefully and if it tightens again, rebuild the head. I'm pretty rigorous about checking the valves and didn't get such a warning and my valve didn't drop so I guess I overeacted and should have known that it wasn't a broken valve at all! Mark '73 Fasty, London ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org