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NH 220 vent holes?

Posted By JeffLipinski Sunday, January 01, 2012 2:41 PM
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JeffLipinski
 Posted Sunday, January 01, 2012 2:41 PM
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I just got my turbo rebuilt as it was drooling oil everywhere. The guy asked me if it was an old/worn out engine with alot of blowby. I said no, but I got to thinking. When I got this truck/engine, I didn't get any history with it. I don't know if this truck was ever run down the road with the turbo mounted before I got it. I pulled the front valve cover off tonite, found the vent hole in the rocker box, pulled the sleeve in the rocker box, and can get a 3/16" allen wrench to seat at the bottom of the hole, like there is a plug in it. BUT, when I put the rubber tipped blow gun to the hole, I can hear a slow release of air, so It could have a very small orfice drilled in the plug. Can I just tap the upper sleeve in the rocker box, locktite in a small allen bolt and be happy- so I don't have to pull the rocker boxes and reset all the valves and injectors? I only pulled the front valve cover, so the other 2 could be different. That's tomorrow nite's project.

Jeff
glenn akers
 Posted Sunday, January 01, 2012 3:39 PM
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You can pack silicone down in the vent hole and if its cleaned from oil it will never blow out.

glenn akers
Aaron
 Posted Sunday, January 01, 2012 4:57 PM
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Turbo might blow the silly putty out, those vents need to be plugged, you could greese a drill bit and keep most of the chips on it and then greese the tap and keep most of the chips on that too, if you have to put threads in the holes, what you might do is get some phooey called liquid metal and glue a bolt head with a little shank left on it to reach in the hole, it would be worth a try you can always pull the rockers later if it don't work.

I can't get anymore out of it, I've got both sticks hot clear up to the knobs allready.
www.killcarb.org
scsiguy
 Posted Monday, January 02, 2012 3:24 AM
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I've always heard to put a sheet metal screw in the rocker box vent hole.

Fred Schrope - Upland, IN
glenn akers
 Posted Monday, January 02, 2012 6:56 AM
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scsiguy (1/2/2012)
I've always heard to put a sheet metal screw in the rocker box vent hole.
       I remenber now we used a pop rivet in the vent to plug.


glenn akers
JeffLipinski
 Posted Monday, January 02, 2012 3:27 PM
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Holes are tapped and plugged, now have to reroute the turbo oil supply line (didn't like how it was run before) and hook up the heater hoses before I can start it, but I doubt I will be able to really run it till spring. Got about an inch of snow this afternoon, and I'm not taking it out in the salt. Thanks for the advice!

Jeff

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