Engine

Model: 911, Year:1980, Mileage:57000, Type of use:Street use only

Model: 911 SC, Year:1982, Mileage:75,000, Type of use:Street use only
I started the car today on my way home from work and it hesitated to turn over then started. I noticed a rather loud hum/whine the entire way home - very odd. The car ran fine though - no power issues at all. Any ideas? Is this the fuel pump? Thanks so much for your help!

Model: 914, Year:1973, Mileage:unk, Type of use:Both Street & Track
I have a 1976 911S 2.7 engine, and I have a set of 911S grind cams for a 3.0 or 3.2L with 49 mm journals, I believe my cam housings to be 47 mm, can the housings be modified to accept these cams? Are there any drawbacks to modifications to the journals?

Model: 911 SC, Year:1978, Mileage:135M, Type of use:Track use only

Model: 911SC, Year:83, Mileage:127000, Type of use:Street use only
Is there any reasonable way to extract the #6 spark plug (either head or plug is stripped) without removing the engine? I've heard the engine can be lowered up to 5 inches (removing only the two rear mounting bolts) without damaging other components. Is this true, and a viable solution?

Model: 911 SC, Year:1978, Mileage:135K, Type of use:Track use only

Model: 911SC, Year:1979, Mileage:88,000, Type of use:Both Street & Track
ChrisThanks for being there and answering all of our questionsJack Minot

Model: 911, Year:1983, Mileage:00000, Type of use:Street use only
I am looking to buy 1980-1984 911. What are typical engine issues that should have been resolved and that I should be aware of before buying. I am a low mileage driver (3 -5k yr) and don't need any major expenses after purchase.

Model: 911SC, Year:1978, Mileage:230k, Type of use:Street use only

Model: 911 sc, Year:1983, Mileage:51000, Type of use:Street use only
70 percent it will start cold 90 percent it wont start warm replaced cold & warm start coils when it starts runs fine till i turn it off it cold be minutes after or hours later it wants to start but i have to keep trying to turn it over