PDA

View Full Version : 400ex engine polishing!!! need help asap!


Wired
03-13-2003, 12:09 PM
hey guys, i searched high and low for an answer but couldnt find any. well my exhaust ports are majorly carboned up and i need to clean them. whats the best and easiest way to pull the exhaust valve guides to i can get in there and polishing the heck out of it???

one more thing, my cylinder head is very carboned up as well, whats the best way of cleaning that also.

if your wondering why its carboned up, i blew a head gasket and raced on it :eek2: my bad. thanks guys for any help

jon
Wired
03-13-2003, 01:03 PM
bump come on guys, i need to get this done as soon as possible!
Nate
03-13-2003, 02:01 PM
You can press the valve guide out or have a machine shop press it out for you, but you will have to resize the hole in it when your finished or your valve may not fit right anymore.
trx400ex
03-13-2003, 02:15 PM
i think walnut blasting will get rid of that carbon
Wired
03-13-2003, 02:26 PM
what in gods name is walnut blasting??? same as sand blasting??? :)
luvmyex
03-13-2003, 02:43 PM
I just rebuilt mine.It had lots of carbon on the head and valves.I gave it to the same machine shop that did my bore.He cleaned everything up and installed new seals for $15.Oh and reseated my valves too.
speedy400
03-13-2003, 03:33 PM
Originally posted by Wired
what in gods name is walnut blasting??? same as sand blasting??? :)
lol, they get a bunch of people to throw walnuts at the piston, this process takes a couple years, haha just kidding, I have no clue.:rolleyes: :confused:
trx400ex
03-13-2003, 03:33 PM
its the same as sand blastign only no sand....i repeat dont sandblast your engine!:D
trx400ex
03-13-2003, 03:35 PM
you can buy it from places that sell blasting stuff. its like little ground up walnuts i beleive.... someone else should know more