1977 911S 2.7 Can an intake valve spring be removed, without topend disassembly?
#1
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I have a 1977 911S w/ 2.7 engine. Can an intake valve spring be removed with engine in the car, just valve covers off? I got done with valve adjustment, was double checking my work, I was able to open #5 intake valve with a 13mm wrench and minimal force. Checked other valves and I am not a strong as I thought. Other intake valve that was on base circle was a ton stiffer. This leads to my question. Thanks for your help, Tim.
#2
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Yep, put the engine on TDC for the cylinder with the broken spring, remove the spark plug and install your leak down tester set at 100 psi. The leak tester will hold the valve closed while you hook up your spring removal tool and do your work. The tricky part is installing the keepers when you're installing the new spring!
#4
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#5
Poseur
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#6
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I have used the following for aircraft engines. With both rockers removed so that both valves are closed, pack in cord a little smaller that clothing line or lawn mower starter with the piston at bottom dead center. Rotate the piston up as far as you can, compressing the line. This will keep the valve in place while you change the spring. You MUST keep the crank/piston in place and not let them rotate. Then you pull the line out. A/C plugs are larger than the 911 plug so it may be time consuming to get the cord in.
#7
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I have used the following for aircraft engines. With both rockers removed so that both valves are closed, pack in cord a little smaller that clothing line or lawn mower starter with the piston at bottom dead center. Rotate the piston up as far as you can, compressing the line. This will keep the valve in place while you change the spring. You MUST keep the crank/piston in place and not let them rotate. Then you pull the line out. A/C plugs are larger than the 911 plug so it may be time consuming to get the cord in.