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213 big block heads-any advantage? #290746 04/16/09 11:01 PM 04/16/09 11:01 PM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	Found a set of 3751213 heads in a friends back yard. As I understand it, these were called 'Motor Home' heads and were supposed to have better cooling particularly around the spark plugs. Anyone know the chamber size, and do they have hardened seats? Are they worth working on or am I just wasting my time?

Re: 213 big block heads-any advantage? [Re: polkat] #290747 04/16/09 11:43 PM 04/16/09 11:43 PM
Joined: Jan 2003 Posts: 884 Vacaville/ El Dorado Hills ,Ca 440FISH super gas
440FISH super gas Joined: Jan 2003 Posts: 884 Vacaville/ El Dorado Hills ,Ca	They are 452's with cooling hole in head near the sparkplug (steam hole), smaller 5/8" spark plug, different type of exhaust valve to handle the heat, and also special retainers on the exhaust spring.

Re: 213 big block heads-any advantage? [Re: 440FISH] #290748 04/16/09 11:49 PM 04/16/09 11:49 PM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	Hardened seats? Chamber size?

Re: 213 big block heads-any advantage? [Re: polkat] #290749 04/17/09 11:37 AM 04/17/09 11:37 AM
Joined: Jan 2003 Posts: 2,734 Charlotte, NC 4 446acuda master
446acuda master 4 Joined: Jan 2003 Posts: 2,734 Charlotte, NC	I've seen the 213 heads with extra cooling on '73-4 motorhomes and extra cooling 452 heads on later motorhomes and highway patrol. The extra cooling around the spark plug was supposed to make the engine less likely to detonate. BTW, if the spark plug holes have a tapered seat then the heads have the extra cooling passages.

Re: 213 big block heads-any advantage? [Re: 446acuda] #290750 04/17/09 11:53 AM 04/17/09 11:53 AM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	Don't these take a special water pump that bolts to the head? "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: 213 big block heads-any advantage? [Re: Rug_Trucker] #290751 04/17/09 11:58 AM 04/17/09 11:58 AM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim I Live Here
nomore65BelvJim I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	some take the water pump bolted to the head, some dont. There are block-off plates that bolt on to fix that. Also some have a different exh manifold bolt pattern, cant fix that one. 5170207-DSC01658.JPG (667 downloads)

Re: 213 big block heads-any advantage? [Re: polkat] #290752 04/17/09 12:28 PM 04/17/09 12:28 PM
Joined: Jan 2003 Posts: 75,125 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,125 A Banana Republic near you.	Quote: Found a set of 3751213 heads in a friends back yard. As I understand it, these were called 'Motor Home' heads and were supposed to have better cooling particularly around the spark plugs. Anyone know the chamber size, and do they have hardened seats? Are they worth working on or am I just wasting my time? I'll pick B Jack ... wasting time

Re: 213 big block heads-any advantage? [Re: 440FISH] #290753 04/17/09 12:29 PM 04/17/09 12:29 PM
Joined: Jan 2003 Posts: 75,125 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,125 A Banana Republic near you.	Quote: They are 452's with cooling hole in head near the sparkplug (steam hole), smaller 5/8" spark plug, different type of exhaust valve to handle the heat, and also special retainers on the exhaust spring. I have 452's with those passages and plugs , they are not marked 213 ???

Re: 213 big block heads-any advantage? [Re: JohnRR] #290754 04/17/09 02:35 PM 04/17/09 02:35 PM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	These don't have the water pump bolted to them, and I see no blockoff plates, but they are 213's. So just considering them as heads, I can consider them just like 452's?

Re: 213 big block heads-any advantage? [Re: polkat] #290755 04/17/09 03:39 PM 04/17/09 03:39 PM
Joined: Jan 2005 Posts: 12,424 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,424 Kalispell Mt.	I had a set of 213s and they looked like any other passenger car BB head. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 213 big block heads-any advantage? [Re: polkat] #290756 04/17/09 03:42 PM 04/17/09 03:42 PM
Joined: Jan 2003 Posts: 75,125 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,125 A Banana Republic near you.	Quote: These don't have the water pump bolted to them, and I see no blockoff plates, but they are 213's. So just considering them as heads, I can consider them just like 452's? yes

Re: 213 big block heads-any advantage? [Re: JohnRR] #290757 04/19/09 06:40 PM 04/19/09 06:40 PM
Joined: Oct 2007 Posts: 100 Sweet Home, Oregon R RainBoKatchr member
RainBoKatchr member R Joined: Oct 2007 Posts: 100 Sweet Home, Oregon	I have a pair of these with just 17K miles on them from the time they were new, so I figure they don't need a rebuild, and I was wondering if I could get by without exhaust seat inserts, and just put in new seals and replace the springs with somewhat stiffer ones. Does anyone have a spring recomendation if 6,000 RPM is all I am planning on doing? (I don't want excessively stiff springs that will cause rapid wear). In any case, with aftermarket springs I would have to get rid of the thick "rotator" exhaust valve spring retainers....would that cause any problems? Dave

Re: 213 big block heads-any advantage? [Re: RainBoKatchr] #290758 04/19/09 07:32 PM 04/19/09 07:32 PM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	So do the 213's have hardened seats?

Re: 213 big block heads-any advantage? [Re: polkat] #290759 04/19/09 11:50 PM 04/19/09 11:50 PM
Joined: Jan 2003 Posts: 75,125 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,125 A Banana Republic near you.	Quote: So do the 213's have hardened seats? NO , the casting is flame hardened , do a valve job and or intall larger valves and the hardened area is pretty much history .

Re: 213 big block heads-any advantage? [Re: JohnRR] #290760 04/20/09 12:55 AM 04/20/09 12:55 AM
Joined: Oct 2007 Posts: 100 Sweet Home, Oregon R RainBoKatchr member
RainBoKatchr member R Joined: Oct 2007 Posts: 100 Sweet Home, Oregon	So on the 213 heads I have that have 17K original miles on them, if I DON'T do a valve job and keep every valve in it's original location, I'm safe? Dave

Re: 213 big block heads-any advantage? [Re: RainBoKatchr] #290761 04/20/09 06:45 PM 04/20/09 06:45 PM
Joined: Jan 2003 Posts: 75,125 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,125 A Banana Republic near you.	Quote: So on the 213 heads I have that have 17K original miles on them, if I DON'T do a valve job and keep every valve in it's original location, I'm safe? Dave pretty much , clean them and lap the valves .

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