SH.18 officially toasted
07-06-2008, 05:02 PM
#1
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SH.18 officially toasted
Well, just like the title states, my SH.18 has finally given up. I was running down the straightaway with my RS4 under full throttle until i heard a slight rise in engine noise and it shut off 
The cause? A weak sleeve from which caused a piece of it to break off and become lodged in the motor. The piston now has a large long gouge on the side (bad compression) and one of the transfer ports is larger than usual. I ported the motor prior to it blowing up, maybe I got too happy with the dremel. All it needs now is a new piston and sleeve, but they're hard to come by and the engine replacement program is too much of a hassle since im in Canada and all.
The cause? A weak sleeve from which caused a piece of it to break off and become lodged in the motor. The piston now has a large long gouge on the side (bad compression) and one of the transfer ports is larger than usual. I ported the motor prior to it blowing up, maybe I got too happy with the dremel. All it needs now is a new piston and sleeve, but they're hard to come by and the engine replacement program is too much of a hassle since im in Canada and all.
07-06-2008, 09:24 PM
#3
RE: SH.18 officially toasted
ORIGINAL: 7M
Well, just like the title states, my SH.18 has finally given up. I was running down the straightaway with my RS4 under full throttle until i heard a slight rise in engine noise and it shut off The cause? A weak sleeve from which caused a piece of it to break off and become lodged in the motor. The piston now has a large long gouge on the side (bad compression) and one of the transfer ports is larger than usual. I ported the motor prior to it blowing up, maybe I got too happy with the dremel. All it needs now is a new piston and sleeve, but they're hard to come by and the engine replacement program is too much of a hassle since im in Canada and all.
Well, just like the title states, my SH.18 has finally given up. I was running down the straightaway with my RS4 under full throttle until i heard a slight rise in engine noise and it shut off
The cause? A weak sleeve from which caused a piece of it to break off and become lodged in the motor. The piston now has a large long gouge on the side (bad compression) and one of the transfer ports is larger than usual. I ported the motor prior to it blowing up, maybe I got too happy with the dremel. All it needs now is a new piston and sleeve, but they're hard to come by and the engine replacement program is too much of a hassle since im in Canada and all.
I am very suprised, i run the sh.18 in alot of my rc's and i think its a great engine, very durable and easy to tune and good power. I think you may have weakened the sleeve when you ported it, i have ported a few of my sh and other engine and you need to be real careful that you dont remove too much or you will weaken the sleeve.
07-06-2008, 11:37 PM
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RE: SH.18 officially toasted
Well, yes they are really reliable and god did it have lots of power, but you're right, the porting did weaken the sleeve. But no worries, I found a replacement engine similar to the SH, a Megatech M16 which i picked up for cheap.
