1996 Challenger 787 low rpm

[normmb]

newbie with some mech abilities...

My Challenger revs up to about 6k - last year it went to 7k

so far, I've cleaned the carbs (careful to note position of adjustable items and re-installed accordingly), replaced the fuel filter, oil filter and plugs, cleaned the RAVE valves (and checked that they worked), wear ring looks good with less than .040inch clear between it and the SWIRL impeller...

Did notice the water valve(?) on the muffler leaks -

thanks in advance...:stupid:

 

[kustomkarl]

Here is some information on the Water Flow Regulator valve.
Water leaking through that hole is a sign that you have blockage in the orifice connector below the regulator. Disconnect the hoses, remember which one goes where, and then un-screw it off the tank. Then, with a wrench, remove the brass fitting. This is the part that will probably be stopped up.
DO NOT CHANGE the setting of this regulator. This valve can cause major engine damage if not operating properly.

The water flow regulator has been calibrated at the factory and should not be tampered with or modified in any way.
CAUTION: Strictly adhere to the calibration procedure or otherwise serious engine damage will occur.
If engine does not maintain RPM or the engine is experiencing poor performance, the water flow regulator valve might be out of adjustment. The normal adjustment as done at the factory is as follows: On the top of the water flow regulator valve locate the red plastic adjustment screw. Mark the location of the screw with a dab of paint for reference. Turn the screw clockwise (tighten) until the top edge of the screw is flush with the top of the black cap. Turn the screw 2 clicks counterclockwise (loosen). This is the factory spring setting. The bottom tapered screw should be screwed in just snug.

This Regulator valve plays an important part in cooling the engine. Each fitting is a special size and controls the flow of water to the different part of the engine depending on the rpm. Never mix up the fittings or you'll have problems with over heating and maybe seizure.

I hope this information helps out. Keep me posted.

Karl

 

[normmb]

will doo,... ah do

thanks for quick response... much appreciated, will let you know how I make out... probably update early next week...:hurray:

 

[kustomkarl]

Cool, Have a good 4th...

Karl

 

[barbermatt]

will the water flow valve efect the engine rpms bouncing a little
thanks barbermatt

 

[kustomkarl]

Is it leaking? It could if it has a little bit of carbon in it...here is some info on that too.
The water flow regulator has been calibrated at the factory and should not be tampered with or modified in any way.
CAUTION: Strictly adhere to the calibration procedure or otherwise serious engine damage will occur.
If engine does not maintain RPM or the engine is experiencing poor performance, the water flow regulator valve might be out of adjustment. The normal adjustment as done at the factory is as follows: On the top of the water flow regulator valve locate the red plastic adjustment screw. Mark the location of the screw with a dab of paint for reference. Turn the screw clockwise (tighten) until the top edge of the screw is flush with the top of the black cap. Turn the screw 2 clicks counterclockwise (loosen). This is the factory spring setting. The bottom tapered screw should be screwed in just snug.

This Regulator valve plays an important part in cooling the engine. Each fitting is a special size and controls the flow of water to the different part of the engine depending on the rpm. Never mix up the fittings or you'll have problems with over heating and maybe seizure.

You have lots of info to check out now...Go do some homework and report back your findings.

Karl

 

[normmb]

Ouch!

bad news turns out i'm missing a chunk of piston.... low compression

looking thru the hole where the rave is inserted we can see a piece of piston missing just above the top ring...:svengo: