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Piston Slap 700 1986

posted by  markdb on  Sun Aug 3 13:20 CST 2003
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My 1986 740 Turbo has piston slap noise on start-up.

Valve cap seals were replaced and valve adjustment done. Oil changes done religiously every 2000 miles...currently using 10W40.

I don't hear anything when driving, and the motor is strong, smooth, and no smoke. I believe the turbo bearing is passing a bit of oil, but compression is even right across and well within spec. Now has 150K miles and most people can't believe the car is 1986.

I understand from the reading I have read that piston slap noise should go away after warm-up. When I pull into the garage after a jaunt the piston slap noise is still audible as with cold start. My Volvo shop says not to worry but I am interested in a second opinion.

Also, is it possible to purchase a complete short block assembly with pistons and crank, etc. If major work is required I'm not interested in a partial fix.






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