I had hardend valve seats installed in my G when the engine was overhauled 10 years or so ago. They had no problem machining the valve pockets to accept the new seats.
I would be surprised if there was a significant difference in the casting for the truck 413 head vs the car casting.
I will say that when I worked in one of the nations largest CPD parts dealerships (late ’80’s), we actually kept 413 motorhome exhaust manifolds in stock as they sold well, cracking was a big problem.
I read somewhere that it is risky to machine the heads in my ram K engine for hard seat inserts as there is not much “meat” under the lip and one might cut into the coolant passage. Any truth in that? The RV/truck engine would have a much different cam/carb/distributor advance configuration for high torque at low RPM and might be more susceptible to higher operating temperatures for long periods of time. Most of the heat from the valve heads can only flow to the coolant while the valve is closed and sitting on the seat. Testing in the engine lab helped define the need for different construction and coolant flow for different conditions. Nowadaze, this is all modeled on a computer which tends to produce pretty good results, I believe. C300K’ly, Rich Barber Brentwood, CA Years ago when I experience my valve recession problem on my 300H with a fresh engine, the machine shop in Portland Oregon who put hgardened seats in my heads tried to convince me that I needed motorhome engine heads because they were cooled much better . I resistedbut have always wondered what THAT story was. 300H 413 Truck engines are not the same as 413 car engines. At least in the larger trucks, they have timing gears instead of chain, which means the cam and distributor turn backwards to car engines, and there are also oth er differences in push-rods, etc.. I once knew a shop that tried to install a car short block in a 2-ton farm truck, and couldn't get it to run. I shared both a car and truck shop manual with them and we finally got it figured out. I believe we ended up using a set of adjustable push-rods and a car distributor, but that has been 20+ years ago, so I may be wrong. It was just before harvest, and the farmer having the work done was frantic to get it going. !965 barn-stored 300-L and parts car I think there were also differences in the water pump/cooling/intake/heads on the motor home engines. The heads look like big block heads, but have slanted spark plugs like a 318 or 340. Water pump housing on front of motor was different, too. I used to have a set of heads, but couldn't even give them away at Carlisle.
Sent from my iPhone www.moparts.org/Tech/Archive/
<http://www.moparts.org/Tech/Archive/motor/36.html> motor/36.html will
provide you most of the info you are looking for. Production of the RB
engines ceased in 1978 (I believe). 413's were made up to the end for
truck/motorhome/industrial use. The first two digits of the displacement
were used up to 1965 when three digits were used. So 41 suggests a pre '65
413. But it should have a letter before the 41(3) to denote year (see
webpage linked above). See also the block casting number to narrow down year
range. The "E" after the number may refer to a cast crankshaft.
Blocks should be the same internally. Heads used vary. Here are some sample
numbers for later production 413's.
2899 913
60-71 413 Truck
2899 943
71-77 361 Truck / 413
Once you narrow down year/application you can look up spec's such as
horsepower, cr, etc.
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of christopher thelastbestgenius@xxxxxxxxxxx [Chrysler300]
Sent: Monday, March 02, 2015 7:09 AM
To:
Subject: [Chrysler300] 413 motor I/d help
Chrysler 300F and Gs used 413s - very briefly, and maybe just offlist
replies back to me - how similar were 413s used in motorhomes - re
good/same heads etc?
- and until what year were 413s built/used in say motorhomes?
Were the motorhome ones a much lower power/specs?!
The motor I am looking at apparently has prefixe "E'" stamped after "41"
stamping on pad atop block, and has an alloy case auto trans bolted up, but
trans still has handbrake on rear - alloy case is all one piece like later
727 torqueflights. I am looking at putting it in my '59 Dodge 2 dr - sump I
need to do that has deep rear, whereas the 413 has the deep part of sump pan
at front where it will foul the xmember - do the 300F/G have deep rear or
deep front sumps?
Christopher in Australia
[Non-text portions of this message have been removed]
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Posted by: Richard Osborne <reomotorsports1@xxxxxx>
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