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Over rev'ed Chrysler 318. How do I check for damage?

I

iflyboeing

Member
Running at about mid throttle, my inexperienced first mate thought he saw a stickup and placed tranny in neutral. engine over revved, but then pannicked hands started flying and the throttle went to full, with the tranny in neutral. Throttle was then immediately chopped to idle. The engine and oil were warm, but she's a young engine. Did I do any latent internal damage?
 
Probably not, and here's why:

1. The valves springs on these motors are not stiff (for good reason) so the valves float easily.

2. When the valves float, the hydraulic lifters "pump up", which keeps the valves open.

3. When that happens, the motor automatically self-limits itself in rpms.

Finally, since these are not valve/ piston interference motors (like virtually all modern car engines), the floating valves will not strike the pistons and get bent.

Jeff

PS: My "first mate" did the same thing, and several times. She also "corrected" her mistake by dropping the poor thing into gear--at high revs! Somehow the drive train took it.
 
My !st mate has done the same thing, hit the throttles & the port shifter at the same time, came out of the slip like a champagne cork!, gotta love those velvet drives
 
From what I've heard, that shears the key on the shaft at the coupling, but mine survived it somehow.

Jeff
 
What about oil seepage past the rear main seal? Got just a little seepage since that event. It's a very young engine, and had never even been above 2500 RPM's
 
Unless it's a gusher, put an oil absorber under the motor and keep an eye on the oil level.

Life (and the boating season) is too short for worrying about everything!

Jeff
 
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