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How difficult would you guys say it is to walnut blast your valves at home? my r56 s has about 112k miles and im not completely sure if the previous owners ever blasted it so i figured just do it. i really dont wanna take it to a shop and be charged $500+ when i can get all the stuff needed for around 200. and itll need it a couple more times in its life time so its just nice to have the stuff already. ive replaced the HPFP and a few other things so im halfway competent when it comes to mechanics.
Not hard at all. If you can take off the intake manifold, you'll be able to get it done.
Of course, the assumption is you already have a good enough air compressor, a walnut blasting unit, and preferrably you also have a port adapter for the vacuum and tiny hole to insert the walnut pipeline. Happy motoring.
Okay so this might be a really silly question. But I bought everything needed to blast at home. Got the intake manifold off. I even went to the local auto parts store and rented an inspection camera to look at the valves to make sure they are properly closed. But I'm still not able to tell if they are fulling closed. What's the best way to make sure the valves are closed? Again sorry for the silly question
Remove the spark plugs and a straight stick, stick it in the hole where you pulked the spark-plug and rotate the crankshaft, then watch the stick going up or down, then mark the stick from the top, if you start from #1 cylinder, it should be the same top dead cencer as #4, #2 and #3 should be same height.
You need a big or 30 gallon compressor, you dont need inspections camera a 3” or 4” mirror and a flashlight works fine.. my 12 gallon compressor took me a little longer and i didn’t use the adapter either a strong 6.5 HP vacuum works great.
i used about 25lbs of wallnut media blast...make sure wear safety goggle and respirator.
I'm in the process of purchasing an 09 mini from a Chrysler dealership. Not a lot of history to go on and 116,000 miles so I've purchased the walnut blaster adapter off ebay to home remedy the coked valves. Don't want to do this again in the near future so I'm also installing a dual occ setup. Seems to be very straight forward with the only concern being the valves fully closed. Well I've got all winter to get Mr. Farrage in top shape. 😎
Pull your valve cover off
&
see what the valve springs are doing
When valves are fully closed
your springs will be fully compressed
when fully open springs will be fully uncompressed
if you look at the photo I posted you can kind of see what am talking about
You can also do it the other ways mentioned
there’s about 1000 different ways you can do it
just do it whatever way you think is easier
if you’re worried about the valves not being closed
try this
Say cylinder 1
pull plug
with your air compressor shot air down into the port an see if you can
feel/hear any air coming from that cylinder .
Through the spark plug hole
also pulling the spark plugs will make it
easier to rotate the motor
you’re not fighting against the compression stage
and yes it is pretty straightforward
just take your time double check everything
it’s something that you cannot not be done
just don’t hesitate to post anything if you need help
edited : 25 pounds of walnuts seems a little high
Play around with the ratio a little bit
Little less walnuts higher air press
or shut off vacuum shot in walnuts in shut off walnut Supply
then shot air in
Just play around with it you’ll see what am talking about .
As long as the valve is close it’s not going to hurt it any if you fill the port up with walnut
Don’t be a afraid to play around with that wand ����
To check if valves are closed, the way I do it is I utilized the vacuum in reverse direction to blow air out, just gotta make sure the air is clean and no debris to carry out. Then I point this air into the valve port. With spark plug hole open, I can feel if there's air coming out.
Doing it this way has advantages, vacuum runs a bit quieter than shooting compressed air, the vacuum blowing the air at a high volume gives enough clue on if the air comes out of the spark plug holes. This method works for me all the time. Done many MCS blasting jobs so far.
To check if valves are closed, the way I do it is I utilized the vacuum in reverse direction to blow air out, just gotta make sure the air is clean and no debris to carry out. Then I point this air into the valve port. With spark plug hole open, I can feel if there's air coming out.
Doing it this way has advantages, vacuum runs a bit quieter than shooting compressed air, the vacuum blowing the air at a high volume gives enough clue on if the air comes out of the spark plug holes. This method works for me all the time. Done many MCS blasting jobs so far.
10-17-2018, 08:53 PM
