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Magnum top end reassembliy ???? #275238 04/02/09 05:38 PM 04/02/09 05:38 PM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Hey guys i am putting back together the top end on my magnum/LA small block and have some questions. What is the correct torque for the magnum headbolts " iam using 30W oil on the threads and under the head of the bolt." and are they torque in the same pattern as an LA engine? Also when i am setting the valve lash i set the intake valve while the exhaust is closing? Then the exhaust valve while when the intake is opening?? last question i swear. What is the torque on the intake bolts. Thanks guys

Re: Magnum top end reassembliy ???? [Re: 540challenger] #275239 04/02/09 07:52 PM 04/02/09 07:52 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Head bolts = 105lbs. If you have had the block decked, you might want to verify the bolts don't bottom in the holes. Mine did and I had to use head bolt washers to keep the bolts from bottoming in the holes. Mopar Performance sells a valve lash adjustment chart decal that you can stick under the hood. Makes it nice and simple and you don't miss any. Intake manifold bolts = 45lbs. Fastest 300

Re: Magnum top end reassembliy ???? [Re: Crizila] #275240 04/02/09 07:54 PM 04/02/09 07:54 PM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: Head bolts = 105lbs. If you have had the block decked, you might want to verify the bolts don't bottom in the holes. Mine did and I had to use head bolt washers to keep the bolts from bottoming in the holes. Mopar Performance sells a valve lash adjustment chart decal that you can stick under the hood. Makes it nice and simple and you don't miss any. Intake manifold bolts = 45lbs. Thanks for the specs. I was aware of them bottoming out and check All is good so far.

Re: Magnum top end reassembliy ???? [Re: 540challenger] #275241 04/02/09 08:05 PM 04/02/09 08:05 PM
Joined: Sep 2007 Posts: 5,037 hi sharpie Moparts Linguist
sharpie Moparts Linguist Joined: Sep 2007 Posts: 5,037 hi	how far do you have to go to bottom out the bolts? I had my block (Magnum) squared, but I guess the machinist took very little off (or that's what he said).

Re: Magnum top end reassembliy ???? [Re: Crizila] #275242 04/02/09 08:26 PM 04/02/09 08:26 PM
Joined: Jan 2008 Posts: 377 Michigan Troll B blk00rt enthusiast
blk00rt enthusiast B Joined: Jan 2008 Posts: 377 Michigan Troll	if you are using a magnum intake on magnum heads then the intake bolt torque is 12 nm. almost nothing Rob Dunn 1976 Dart Sport 360 2000 dakota RT 408 with 150 nitrous 2013 Dodge Ram 1500 Hemi 2009 Jeep Patriot

Re: Magnum top end reassembliy ???? [Re: blk00rt] #275243 04/02/09 08:55 PM 04/02/09 08:55 PM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman pro stock
Wedgeman pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	Like tightening a spark plug ?

Re: Magnum top end reassembliy ???? [Re: sharpie] #275244 04/02/09 09:24 PM 04/02/09 09:24 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	Quote: how far do you have to go to bottom out the bolts? I had my block (Magnum) squared, but I guess the machinist took very little off (or that's what he said). . use harden washers under head bolts. Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: Magnum top end reassembliy ???? [Re: 70AARcuda] #275245 04/02/09 10:26 PM 04/02/09 10:26 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Magnum intake torquing pattern. front to rear pass side is 10-6-2-4-7-11. Drivers side front to rear 9-5-1-3-8-12. torque bolts 1-4 in the sequence in 12 inch lb increments to 72 inch lbs. Then the remaining bolts to 72 inch lbs(in sequence). Check that ALL are at 72 inch lbs. If not tighten them up to 72 in sequence. Then tighten ALL bolts to 144 inch lbs in sequence & recheck. live every 24 hour block of time like it's your last day on earth

Re: Magnum top end reassembliy ???? [Re: RapidRobert] #275246 04/03/09 12:09 AM 04/03/09 12:09 AM
Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada W Wedgeman pro stock
Wedgeman pro stock W Joined: May 2004 Posts: 1,522 Ste-Sophie, Quebec, Canada	Robert, Does 144 inch/pounds equals to 12 foot pounds &? We won't get confused by the conversion........ Dan

Re: Magnum top end reassembliy ???? [Re: Wedgeman] #275247 04/03/09 12:12 AM 04/03/09 12:12 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	yes live every 24 hour block of time like it's your last day on earth

Re: Magnum top end reassembliy ???? [Re: RapidRobert] #275248 04/03/09 08:02 AM 04/03/09 08:02 AM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: Magnum intake torquing pattern. front to rear pass side is 10-6-2-4-7-11. Drivers side front to rear 9-5-1-3-8-12. torque bolts 1-4 in the sequence in 12 inch lb increments to 72 inch lbs. Then the remaining bolts to 72 inch lbs(in sequence). Check that ALL are at 72 inch lbs. If not tighten them up to 72 in sequence. Then tighten ALL bolts to 144 inch lbs in sequence & recheck. thankk for the info. This this method apply tojust the stock intake or an afermarket i have a air Gap manifold?? Last edited by 540challenger; 04/03/09 08:03 AM.

Re: Magnum top end reassembliy ???? [Re: sharpie] #275249 04/03/09 08:33 AM 04/03/09 08:33 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: how far do you have to go to bottom out the bolts? I had my block (Magnum) squared, but I guess the machinist took very little off (or that's what he said). I think I had to have .015" taken off my block to get the deck height I wanted. All the bolt holes in my LA block were not taped ( 1/2-13 ) the same depth, nor were they the same depth period. The top row of bolt holes was deep enough - barely. The bottom row had some deep enough and some not quite deep enough. I put hardened head bolt washers on all of them. Thanks for the correction on the manifold bolt torque - although 12nm seems ( "almost nothing") as does 144 inch lbs. Had my Magnum heads drilled to accept both styles and I am presently using an LA style manifold with them. Ether way, I'm using grade 8 5/16-18 bolts - 30ft lb capacity. Assume the angle on the Magnum bolt pattern requires considerable less torque? Fastest 300

Re: Magnum top end reassembliy ???? [Re: 540challenger] #275250 04/03/09 11:08 AM 04/03/09 11:08 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: This this method apply tojust the stock intake or an afermarket i have a air Gap manifold?? It would apply to both as torque specs are about the particular bolt being used to get it to the right amount of stretch & the 12 ft lbs would be for the stock type bolts & not sure if the angle(vertical) affects this also. Last edited by RapidRobert; 04/03/09 11:32 AM. live every 24 hour block of time like it's your last day on earth

Re: Magnum top end reassembliy ???? [Re: RapidRobert] #275251 04/03/09 11:48 AM 04/03/09 11:48 AM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger OP master
540challenger OP master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: Quote: This this method apply tojust the stock intake or an afermarket i have a air Gap manifold?? It would apply to both as torque specs are about the particular bolt being used to get it to the right amount of stretch & the 12 ft lbs would be for the stock type bolts & not sure if the angle(vertical) affects this also. thanks again

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