I plan to renew the head gasket on my E320 and I'm already buying parts for this project. I'd like to replace the valve guides but I don't know how many I needed. Also, there are two sets of dimemsions for valve guides in Fastlane. exhaust 12.5 mmm;std 7.0 mm id and 12.7 mm; 7.00 mm id. Could someone tell me which one is right for my car? I have a 1994 E320 sedan.
Another question, do I need to remove the bottom front cover of the timing chain?
94 E320 Silver 210000 miles
94 740il Pewter Green 97000 miles- Retired
05 S430 4Matic
07 Lexus IS250