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440 pushrods rubbing heads- HELP #429065 08/05/09 10:23 AM 08/05/09 10:23 AM
Joined: Jul 2005 Posts: 336 Creston, Iowa 3 340man4ever OP enthusiast
340man4ever OP enthusiast 3 Joined: Jul 2005 Posts: 336 Creston, Iowa	I mocked up my 440 valvetrain last night and discovered I have a few pushrods that are way too close to the intake port on the head (915's). One is physically touching. I have Crane ductile iron adjustable rockers and Crane solid lifter pushrods. What is the right way to fix this? Thanks in advance! Last edited by 340man4ever; 08/05/09 12:48 PM. Curator at Adams County Speed Shop

Re: 440 pushrods rubbing heads- HELP [Re: 340man4ever] #429066 08/05/09 10:25 AM 08/05/09 10:25 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Grind some clearance in the head

Re: 440 pushrods rubbing heads- HELP [Re: MR_P_BODY] #429067 08/05/09 10:28 AM 08/05/09 10:28 AM
Joined: Jun 2003 Posts: 9,225 Charleston S sixpackgut Drag Week Mod Champion
sixpackgut Drag Week Mod Champion S Joined: Jun 2003 Posts: 9,225 Charleston	I would buy a rocker arm shim kit and shim the rockers away from the stands Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs

Re: 440 pushrods rubbing heads- HELP [Re: 340man4ever] #429068 08/05/09 10:31 AM 08/05/09 10:31 AM
Joined: Jan 2007 Posts: 160 Florida H hemisurfer member
hemisurfer member H Joined: Jan 2007 Posts: 160 Florida	been throgh this twice with Iron and Aluminum heads with the Crane Ductile Rockers. I concur grind the heads for clearance....that's the fix. FYI I also used Smith Brothers pushrods the 2nd time around and they seemed to be machined to closer tolerences giving me a bit more clearance than the cheapo pushrods I was running b4. Chris

Re: 440 pushrods rubbing heads- HELP [Re: sixpackgut] #429069 08/05/09 10:31 AM 08/05/09 10:31 AM
Joined: Jul 2005 Posts: 336 Creston, Iowa 3 340man4ever OP enthusiast
340man4ever OP enthusiast 3 Joined: Jul 2005 Posts: 336 Creston, Iowa	To clarify the pushrods need to be moved horizontally not vertically- Anyone had this problem before? Last edited by 340man4ever; 08/05/09 10:32 AM. Curator at Adams County Speed Shop

Re: 440 pushrods rubbing heads- HELP [Re: 340man4ever] #429070 08/05/09 10:35 AM 08/05/09 10:35 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Like most said above. Grind out some of the push rod passage to gain push rod to head clearance. Been there - Done that.

Re: 440 pushrods rubbing heads- HELP [Re: MoparforLife] #429071 08/05/09 11:00 AM 08/05/09 11:00 AM
Joined: Sep 2003 Posts: 1,397 Toronto Ontario, Can Glen440 pro stock
Glen440 pro stock Joined: Sep 2003 Posts: 1,397 Toronto Ontario, Can	Crane iron rockers and 3/8 pushrods need to clearance the head to fit. I had to clearance some shaft stands on my 452 heads for the rockers. 87 dakota 6.1 hemi

Re: 440 pushrods rubbing heads- HELP [Re: Glen440] #429072 08/05/09 11:17 AM 08/05/09 11:17 AM
Joined: Jan 2003 Posts: 16,923 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,923 NC	Quote: Crane iron rockers and 3/8 pushrods need to clearance the head to fit. Using 3/8 pushrods (good idea) on Mopar BB iron heads typically will need grinding some casting flash on the heads. It shouldn't need much. If the rocker isn't centered on the valve, shims against the rocker shaft holddowns might help. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: 440 pushrods rubbing heads- HELP [Re: 440Jim] #429073 08/05/09 11:21 AM 08/05/09 11:21 AM
Joined: Jul 2005 Posts: 336 Creston, Iowa 3 340man4ever OP enthusiast
340man4ever OP enthusiast 3 Joined: Jul 2005 Posts: 336 Creston, Iowa	How much clearance do I need? Who sells the proper shims for the Crane ductile iron rockers? Curator at Adams County Speed Shop

Re: 440 pushrods rubbing heads- HELP [Re: 340man4ever] #429074 08/05/09 11:32 AM 08/05/09 11:32 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: How much clearance do I need? Who sells the proper shims for the Crane ductile iron rockers? Get .015 clearance and you should be good unless your push rods are flexing alot. Mancini sells the shims Check your clearance all the way through the travel but usually its closest at full lift

Re: 440 pushrods rubbing heads- HELP [Re: 340man4ever] #429075 08/05/09 12:19 PM 08/05/09 12:19 PM
Joined: Nov 2004 Posts: 2,119 sc T tjmarcus1 top fuel
tjmarcus1 top fuel T Joined: Nov 2004 Posts: 2,119 sc	Quote: To clarify the pushrods need to be moved horizontally not vertically- Anyone had this problem before? so, are you saying the rocker tip is not centered on the valve stem? if not, get the shim kit. if they are, start grinding.

Re: 440 pushrods rubbing heads- HELP [Re: 340man4ever] #429076 08/05/09 12:29 PM 08/05/09 12:29 PM
Joined: Mar 2008 Posts: 883 Affton MO Q qwkmopardan super stock
qwkmopardan super stock Q Joined: Mar 2008 Posts: 883 Affton MO	Common problem. I now clean up the head casting in the area of pushrod while the grinder is out for porting. It sucks to start grinding cast iron on a clean assembled set of heads. If not done and pushrod hits it can flatten a cam.

Re: 440 pushrods rubbing heads- HELP [Re: tjmarcus1] #429077 08/05/09 12:40 PM 08/05/09 12:40 PM
Joined: Jul 2005 Posts: 336 Creston, Iowa 3 340man4ever OP enthusiast
340man4ever OP enthusiast 3 Joined: Jul 2005 Posts: 336 Creston, Iowa	Quote: Quote: To clarify the pushrods need to be moved horizontally not vertically- Anyone had this problem before? so, are you saying the rocker tip is not centered on the valve stem? if not, get the shim kit. if they are, start grinding. I need to see how the alignment looks. I got frustrated when I found the clearance issue and put it away- always something with these projects lol Looks like shims might work, but most likely time to have the heads clearanced. Not the route I was hoping to take. Last edited by 340man4ever; 08/05/09 12:41 PM. Curator at Adams County Speed Shop

Re: 440 pushrods rubbing heads- HELP [Re: MR_P_BODY] #429078 08/05/09 02:58 PM 08/05/09 02:58 PM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis I Live Here
hemi-itis I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	Quote: Quote: How much clearance do I need? Who sells the proper shims for the Crane ductile iron rockers? Get .015 clearance and you should be good unless your push rods are flexing alot. Mancini sells the shims Check your clearance all the way through the travel but usually its closest at full lift The .010 to .o15 is all you need,if flexing, the head will act like a girdle to avoid too much flex HEMI-ITIS has no cure. My condition is fully BLOWN!!

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