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472 hemi world block over heating problem #2623049 02/18/19 08:34 PM 02/18/19 08:34 PM
Joined: Aug 2003 Posts: 3,101 cincinnati ohio M mcat4321 OP master
mcat4321 OP master M Joined: Aug 2003 Posts: 3,101 cincinnati ohio	ok im working on a 472 hemi, im not sure what heads just yet, i have not removed VC yet.it is a world block, and it runs hot 260-280+. new water pump, new big aluminum rad, 2 elec. fans on full time. the customer purchased the car sight unseen , and it has ran hot from the beginning, pushed in a corner for 2 years.. and he know nothing about the details of the engine. its got major blow bye now, im assuming rings are shot, i will comp. test and leak down..soon. is there anything to look at as far as the block and head combination?

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623072 02/18/19 09:58 PM 02/18/19 09:58 PM
Joined: Apr 2005 Posts: 81 Sweden M MikeN member
MikeN member M Joined: Apr 2005 Posts: 81 Sweden	Some World blocks had a casting failure with no or limited waterflow between pump and cylinders.

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623085 02/18/19 10:28 PM 02/18/19 10:28 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton master
Clanton master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Sooo much could be off,fuel,timing,dirt in carb... GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623093 02/18/19 10:46 PM 02/18/19 10:46 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	does the block have any fill in it?

Re: 472 hemi world block over heating problem [Re: MikeN] #2623112 02/18/19 11:21 PM 02/18/19 11:21 PM
Joined: Aug 2003 Posts: 3,101 cincinnati ohio M mcat4321 OP master
mcat4321 OP master M Joined: Aug 2003 Posts: 3,101 cincinnati ohio	Originally Posted By MikeN Some World blocks had a casting failure with no or limited waterflow between pump and cylinders. are there any certain numbers or markings on the bad blocks? how can i tell?

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623140 02/19/19 12:14 AM 02/19/19 12:14 AM
Joined: Apr 2005 Posts: 81 Sweden M MikeN member
MikeN member M Joined: Apr 2005 Posts: 81 Sweden	I dont have access to a fullscreen computer just now so posting a link gets difficult but if you look for an old post I made July 9 2016 you will see a thread (426 Hemi gasket backwards?) how two other members handled this problem. The problem exists on some of the the World "street iron block".

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623149 02/19/19 12:39 AM 02/19/19 12:39 AM
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	I'm having a hard time accepting the car ran @ 260*+ If it ran well and the gauge was 260,,,it's defective.Flush the fuel system and see if you can start the car and start the diagnostics Oh,check the oil to see that it looks OK and does NOT smell like gas! HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: 472 hemi world block over heating problem [Re: MikeN] #2623151 02/19/19 12:40 AM 02/19/19 12:40 AM
Joined: Aug 2003 Posts: 3,101 cincinnati ohio M mcat4321 OP master
mcat4321 OP master M Joined: Aug 2003 Posts: 3,101 cincinnati ohio	found it! thanks... lots of great info i will for sure be checking the part number

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623222 02/19/19 06:55 AM 02/19/19 06:55 AM
Joined: Jan 2011 Posts: 4,785 Utah and Alaska astjp2 master
astjp2 master Joined: Jan 2011 Posts: 4,785 Utah and Alaska	My 572 world block had casting flash in the upper holes for the water pump, had to use a hole saw to clean them up...its easy to spot if its bad. Tim 1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta I didn't do 4 years and 9 months of Graduate School to be called Mister!

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623297 02/19/19 01:46 PM 02/19/19 01:46 PM
Joined: Jan 2003 Posts: 14,492 So. Burlington, Vt. F fast68plymouth I Live Here
fast68plymouth I Live Here F Joined: Jan 2003 Posts: 14,492 So. Burlington, Vt.	That’s interesting info on those plugged passages in the world blocks........ and that it’s not a “one off” situation. 68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623306 02/19/19 02:14 PM 02/19/19 02:14 PM
Joined: Jan 2003 Posts: 2,296 NE Ohio DoubleD top fuel
DoubleD top fuel Joined: Jan 2003 Posts: 2,296 NE Ohio	check the head gaskets - pretty common problem of the water holes to the heads being blocked when using the wrong head gasket

Re: 472 hemi world block over heating problem [Re: mcat4321] #2623313 02/19/19 02:27 PM 02/19/19 02:27 PM
Joined: May 2007 Posts: 1,443 Maryland D Dads426 pro stock
Dads426 pro stock D Joined: May 2007 Posts: 1,443 Maryland	I would check cylinder head temp with an IR gun. We had fill in one block that blocked the rear two cylinders and the passenger head ran significantly hotter than the drivers side. 2012 422 Allstars NSS Champion 2013 422 Allstars NSS Champion 2014 422 Allstars NSS Champion

Re: 472 hemi world block over heating problem [Re: Dads426] #2623413 02/19/19 07:14 PM 02/19/19 07:14 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Run it on alcohol or E85 if the other suggestions don't get you anywhere. R.

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