Re: Porting stock heads (Ray Block)

From: TJ (dakota52318@toad.net)
Date: Tue Mar 25 2003 - 01:47:17 EST


OK, at what year did the head cracking become a problem then?? That would
be good to know like someone said so you could go the the junk yards and get
(hopefully) a good set.

TJ
dakota52318@toad.net
1992 Dodge Dakota 4X4
Long Bed, 318, 46RH Auto
DT Headers, Functional RamAir Hood
K&N FIPK, Flowmaster Muffler
Custom Throttle Body
MP Computer
15.74@87.59
4350lbs
----- Original Message -----
From: "greg conner" <dodgeboy93@hotmail.com>
To: <dakota-truck@dakota-truck.net>
Sent: Monday, March 24, 2003 8:34 AM
Subject: Re: DML: Porting stock heads (Ray Block)

>
> When I had a set of heads done for my v6... I probably went through 10 v6
> heads to find a set of uncracked ones. They all cracked in the same spot,
> between the intake and exhaust seats. The firts set I got I ordered off
> ebay, didnt think to magnaflux them because I had never heard of this
> problem before. I set them to marty and they both were cracked. I then
> went to a few junkyards..and could see the cracks on the seats with the
> naked eye... probably looked at 6 heads that way. Marty even picked up a
> set of heads from a yard down by his shop for me and they were cracked
also.
> I do think it depends on the condition and use of the engine though.
When
> I pulled the heads off my 93 v6...that had over 110k miles on it but
regualr
> maintanance, the heads were not cracked. All the junk yard heads I saw
you
> could tell that they were most likely off fleet vehicles or work trucks
that
> had hard lifes... saw all the sludge build up around the springs and
carbon
> in the chambers.
>
> The point of all this?... I dont know...just felt like adding..hehe
>
>
>
> Greg Conner
> 1996 RC
> 3.9 hybrid
>
>
>
>
>
> >From: "Bernd D. Ratsch" <bernd@texas.net>
> >Reply-To: dakota-truck@dakota-truck.net
> >To: dakota-truck@dakota-truck.net
> >Subject: Re: DML: Porting stock heads (Ray Block)
> >Date: Mon, 24 Mar 2003 10:09:20 -0600
> >
> >
> >I agree with Bill on this...the stock heads are prone to cracking.
> >
> >However, finding a set of good stock Magnum heads isn't hard as their is
an
> >abundance of them from wrecking yards ('92+ 5.2/5.9L heads are the same)
or
> >from folks who have swapped out to the R/T heads and are selling them
> >either
> >personally or on eBay.
> >
> >Cost wise, it's cheaper to modify a good set of stock heads ($450-$500
for
> >rework w/porting and gasket matching on the average)...but performance
> >wise,
> >the R/T heads will come out ahead when it boils down to all out high-end
> >performance.
> >
> >On Supercharged and/or large cubic-inch displacement applications,
> >definitely invest in a set of R/T heads.
> >
> >- Bernd
> >
> >----- Original Message -----
> >From: <B1LLYW@aol.com>
> >To: <aol@dakota-truck.net>
> >Sent: Monday, March 24, 2003 9:51 AM
> >Subject: Re: DML: Porting stock heads (Ray Block)
> >
> >
> > >
> > > In a message dated 3/24/2003 10:39:08 AM Eastern Standard Time,
> > > bpracing@worldnet.att.net writes:
> > >
> > >
> > > > You know, I've heard that but haven't seen any evidence to back it
up.
> >Have
> > > > you had 10 heads magnafluxed? I've just had 4 used, stock magnum
> >heads
> > > > magnafluxed for cracks and only one had a crack. It is small and
on
> >the
> > > > edge of one exhaust seat. The machine shop said it's easily
> >repairable.
> > > > That head was off a high mileage van that died an ugly death due to
> >lack
> >of
> > > > maintenance. (the oil pickup was totally blocked by sludge) :-(
> > > >
> > >
> > > I looked at a dozen stock heads when I was at KRC's shop in Florida.
> >They
> > > were all take-offs that Marty had replaced with R/T heads. Every
single
> >head
> > > had I saw, without exception, had cracks. He told me that virtually
> >everyone
> > > he pulls off, has cracks, usually between the seats.
> > >
> > > Here's a link a recent thread on dodgetrucks.org on the same subject.
> > >
> > > http://www.dodgetrucks.org/forums/viewtopic.php?t=21450&
> > > highlight=cracked+magnum+heads
> > >
> > > BTW Ray, I agree that the flow on the stock Magnum heads is decent, I
> >just
> > > wanted to point out what is a potential downside i.e. durability.
> > >
> > > Bill White - http://www.bionicdodge.com
> > >
> > > '02 Dakota QC 4x4, SLT +, 4.7, 5 spd, 3.92 LSD
> > > '95 Dakota CC 4x2, SLT, 318, 5 spd, 3.55 LSD
> > >
> >
> >
>
>
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