hello all, my 73 standard beetle with a 1300tp is making some chronic noise when driving.
the noise is similar to a normal running engine only with a louder pinging ( its like a louder version of the sound of the tappets). the sound appears from start up and is consistent as the engine warms. it is only really badly noticable when it revs above 2500rpm, anything under sounds like normal, also sounds normal at idol. it has backfired only once in a week when going down a hill. initially i assumed it was the muffler, so i had a look and found a few black carbon spots where the muffler joins the heater boxes. i have replaced the brackets where the muffler joins the heater box aswell as the gasket where the heater box joins the head and used a muffler cement seal paste on both. no joy there unfortunatly. have covered the ends of the pee shooters and there is no evident noise, the baffles inside the shooters are still good as they are only 6 months old. have checked the muffler for holes and leaks but there appear to be none. all nuts appear tight as they should be. is the muffler shot? or is it the head? i am up the creek! please help, any advice as to what it is exactly and how to fix it will be greatly appreciated, if further info is required, will do my best to provide
nick
0422 721 253
bond Veteran Volks Folk
2,456 posts · joined Jul 2003 ·
