So... I cleaned my raves today....

[JWLogsdon]

Is this just maintenance or can i expect better performance????

they were real bad, but they cleaned up real nice after soaking them in gas and wire wheel brush.

I have to pick up new o-rings and gaskets tomorrw and put them back in.

 

[470]

It's just a maintenance thing unless real bad and hanging. I use easy off oven cleaner, it just wipes off. That way I don't scratch the coating on the valves.

 

[Guest_User]

It's just a maintenance thing unless real bad and hanging. I use easy off oven cleaner, it just wipes off. That way I don't scratch the coating on the valves.

oven cleaner!? awesome! bc carb cleaner and 2+2 take quite a while to disolve the gunk... thanks for the tip!

 

[RFoster130]

Yeah its just maintenance. But if you have one get too gunked up and it sticks, you will feel the hesitation up around 5000 RPM. Ive seen worse than yours. I clean em every spring when i get the boat ready. Dont use a wire wheel either, its too harsh and you can actually wear the metal down. They are designed to have a specific tolerance.

 

[LSaupe]

Any idea what that tolerance is? Cant seem to find it anywhere.

Also, dont usually see it mentioned but having a clean sensing hole in the cylinder and valve body would be critical to operation as well.

 

[RFoster130]

I have no clue...I just know when they get worn down they get sloppy and flop around, which causes an oil leak. Ive also heard of it causing them to break.

 

[Guest_User]

I have no clue...I just know when they get worn down they get sloppy and flop around, which causes an oil leak. Ive also heard of it causing them to break.

I just found this out. The valve was so sloppy in the housing it was the source of the oil leak...

 

[RFoster130]

Thats usually how people find the problem...an oil leak they cant find.

 

[Guest_User]

Thats usually how people find the problem...an oil leak they cant find.

I was concerned bc this happened on a reman with 7-9 hours on the clock. I guess this one slipped thru the cracks bc these used housings should have been tossed in the bin, they were so worn... I received my second housing assy from SBT today when I informed them about the partially melted exhaust valve piston on the MAG cylinder... Their customer service is excellent, and I`m squared away...

op, sorry for the off topic...

 

[JWLogsdon]

Im going to get the o-rings and gaskets tomorrow and I was going to compare mine to new ones. I'll take a pair of Micometers and see if there is any difference in thickness and report back to you guys.

 

[JWLogsdon]

what about cleaning the inside. I can only see the top of the slot, but it seems to be full of gunk also.

 

[LSaupe]

I cleaned my slots using a shop-towel (paper towel) wrapped around a paint stick and made sure the slot was covered by the piston.

Need to be VERY careful, however, to not let any crud get loose and onto the piston.