S4 spider 2 exhaust valves stuck open - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 6 (permalink) Old 06-11-2019, 03:15 PM Thread Starter
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S4 spider 2 exhaust valves stuck open

S4 spider veloce with 48k miles was not run for a year while I recovered from a stroke. Only used non ethanol gas. Car will crank but not accelerate. 2 exhaust valve are stuck open. Are soaking with penetrating oil. Any suggestions appreciated.
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post #2 of 6 (permalink) Old 06-11-2019, 05:33 PM
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Rotate the camshaft so that the valve should be fully closed. Use a hammer and a punch made of soft metal or hard wood to bounce the valve open and closed a few times.

Make sure that the punch contacts the top of the valve stem and not the spring retainer.

Ed Prytherch
79 Spider
85 GTV6 3L
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke

Last edited by alfaparticle; 06-11-2019 at 05:43 PM.
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post #3 of 6 (permalink) Old 06-12-2019, 05:15 AM
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Would say put some rope in the cylinder and slowly rotate the piston up, but there's a chance that would bend the valve. I'd get a large oak dowel and tap around the valve and cross your fingers it pops back up. If not remove the cam and lifter bucket and tap the top of the valve stem with a dead blow. If you go that route just remember there's going to be a small shim under the lifter bucket that you'll need to keep up with.
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post #4 of 6 (permalink) Old 06-12-2019, 08:08 AM
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can I just ask how you diagnosed 2 exh. valves stuck open?

since you cranked the engine over with 2 valves stuck open, haven't they already hit?

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
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post #5 of 6 (permalink) Old 06-12-2019, 09:39 AM Thread Starter
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Removed valve cover And can see valves as engine cam turns.
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post #6 of 6 (permalink) Old 06-13-2019, 06:58 AM
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Assuming you mean the lifter buckets? You cannot see the valves unless you've removed the cams and lifter buckets.
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