2000 rude 175 ficht

[JohnnyG1]

Hi All,
Hope you guys can help me. Ok here we go, last week I did a decarb on this motor all went fine.....until I went out to do test runs I did 4-5 mid range passes pushing around 4K RPM's that went great, Then I did 4-5 high speed runs pushing around 5700-5800 rpm's motor was running like a champ so I headed back to the ramp well just before I get to the 5mph zone the motor quits no alarms just dies I can crank it but it wont fire so I take it home and do a compression test well cylinder 2,4 and 6 are low 20-35psi in all three cylinders. Could my valves gotten stuck open? What can I do to get the valve unstuck?

Thanks

 

[jonesg]

Re: 2000 rude 175 ficht

valves ?

Sounds like the head gasket popped.
I would test the overheat alarm if it did indeed have a hot run and find out why it happened.... if it did. If the over heat alarm doesn't beep when the port temp switch wire is grounded to the block its almost certain that you had a hot run. If so its time to check the thermostats , when was the water pump last done?

With the head off, place the mating surface on a plate of glass and see if its still flat, sometimes they warp a bit but it can be fixed.

You could have a tech run the software and tell you if it overheated but then you get into money.

Get a genuine factory service book from ebay or a dealer anyway.
I've also seen the diagnostic software with cables for sale on ebay, all you need is a laptop.