Mopar 340 crankshaft identification Here are the small block numbers: 62-67 318 and 64-67 273 forged 2128278, 2128869, 2205700 68-69 273 cast 2658268, 2658393 67-73 318 cast 2658278, 2658393 74-86 318 cast 2658278, 2658393, 3462387 2658391 68-72 340 forged 2532457, 2843868 73 340 cast 3462387 71-86 360 cast 3418640, 3418641, 3418642 Mar 12, 2010 · Ok guys so I just last week picked up a late 1966 318 LA black (technically a 67) it came out of a 66 dodge coronet. One is if it is a cast crank the casting line (parting line) will be thin, less than 1/8". If it doesn't say that, you either have a mismatched crank and balancer, or some previous owner swapped out the entire rotating assembly to get away from the one and a half year only external balance so they could use more common internal balance parts. Dec 20, 2024 · Dodge 340 Engine Specifications. The Dodge 340 engine is a high-performance V8 engine that was produced by Chrysler from 1968 to 1973. As far as I am aware they all look identical, please please correct me if there is a way to tell the difference. the block ID# is 2536030 build date RB/B, LA Cylinder Head Casting Numbers: The casting numbers for most RB, B, and LA heads are found in two places. The first cast crank that Ma Mopar ever produced was in 1971. If it is a forged crank the forging line will be wide, around 3/8". 92” intake valves; exhaust valves remained the same; Paint went from orange to corporate blue; 1973 - The cast crank had a different number than the 1972 counterpart, because it was shot-peened for greater strength. But I'm not sure of the exact years and color changes. 31 inches. The 360 was the lucky winner. Jun 11, 2005 · There are two ways to tell. 02" intake, 1. They were not different from a -1 to a potential -16. if you use a non weighted flywheel made for internal balance engine on a cast crank external balanced engineit will be fine up to around Feb 1, 2011 · NHRA agreed with me,. (A number 4 near the front and one near the rear of the block. 04 V-8: Cast Crank: 2780930: 3671587 3418915: 3658393 3462387 3751841: 1971-89: 360 5. What does the 5 mean at the end of the casting number after the 340-? Oct 20, 2017 · 340/360 were moved to “J” casting heads with 1. 02 valves used from 68-70. CRANK CASTING NUMBER: 1989-91: 122 2. Mopar Engine Block Casting Number Location Casting numbers for both small-block Mopar and big-block Mopar engines can be found on the left (driver’s) side of the block, and will consist of seven Jan 14, 2005 · I'll assume you want the casting or forging numbers since cranks don't have serial numbers. IIRC, the '68 and '70 340 was NHRA factored to 310 and the six-pac 340 to 320 horse. I recently had a customer want to order a new torque converter for Apr 1, 1998 · 1968-’72, 340; 2843883, 318 truck; and 3751162, 340 cast iron. I bet we'll eventually get different suffix May 1, 2017 · The silent chain crank sprocket has the wide teeth rather than the sharp, bicycle teeth used on the roller chain. Aug 25, 2015 · 915 heads are 70-72 340/360 and either 1. Period. Jul 16, 2005 · To get the ACTUAL assembly date for the ENGINE, you need to look at the front of the block on the machined face. If it has softer rounded edges, its a forged crank and is internally balanced. Jan 14, 2005 · The '62-'67 forged 318 crank has the same forging number as the '64-'67 273, the difference is in the way the rear crank flange is machined. Original engine paint could also provide a hint. 88" exhaust valves; 10. Calling all 340 owners: post your block casting number, and 340-x suffix and date of manufacture. They carry a forging number of 2532457 or 2843868. Jul 13, 2011 · Mopar Engine Block Casting Numbers — The list covers a wide range of engines including the popular 318, 340, 383, 400, 413, 426, and 440 engines. If there is a "E" AFTER the 440 stamp then it has a cast crank. Any 273-318-340 forged crank balancer will work on any stock forged crank as they were a neutral balanced motor , everything was balanced to zero so you could mix and match. 9 4. These numbers are different than the stamped eight-digit number found on the right side of the engine. Nov 26, 2004 · Most likely a '72 and '73 would have a "For 340 cast crank only" small counterweighted balancer. . The numbers for the ENGINE are stamped on the driver side of the block, right under where the head mounts. 346 L-4: 340 5. 00 V-8 : Jun 10, 2014 · How can a person tell by looking at the harmonic balancer whether a 340 has a cast or forged crankshaft? 68 Dart - 72 engine. Jun 10, 2014 · Small Block Mopar Engine . The '73 340 crank is cast, but is also shot peened for extra strength and carries a casting number of 3462387. 00 V-8 : Sep 3, 2013 · I have had them switched before and when you use a weighted flywheel for a cast crank on a forged internal balanced engine you shouldn't feel any vibrations or anything odd even though its not really right. Nov 25, 2021 · The sand cores were all identical, held to a precision that a sand casting could hold. 02 intake valve sizing O head is the same as the 915 head X head is an 894 casting with 2. ) I know the engine was made on 06-15-71. I will attach a picture of the balancer and pictures of the casting numbers of these cranks. If a casting core changed, so did its block casting number. VERY easy to ID. when they refactored the '71 340 to 330 horse. However, when selecting components, be aware that cast iron 340 crankshafts are externally balanced, Feb 20, 2023 · Notice it says "340 cast crank only". Nov 28, 2014 · Mopar 340 V-8 Engine - Carburetors and Cranks 1968-70 - AVS 1971-73 - Thermoquad 1968-1971: forged crank, part number 2532457, 2128869, or 2843868; service part number, 2843868 1972-73: cast crank, 3462387, 3658393, or 3751841 (some 1974-86 cast cranks use the same 3462387 casting number as the 1973 340 crank); service part number 3751162 Chronology of the Mopar 340 V-8 engine (Stephen Havens Jun 26, 2020 · Sharp edges on throws means its a cast crank needing a year correct weird balancer . A ENGINE CYLINDER HEADS CASTING NUMBER: There are basically only two different cylinder heads that have been used on the "LA" engines from 1964-1984 a small port 273-318 and a big port 340-360. Aug 30, 2018 · Casting numbers for the small-block Mopar and big-block Mopar engine blocks can be found on the left (driver’s) side of the block, and will consist of seven numerals. The forged crank will have a more symetrical flange. The cast crank will have a larger uneven flange. This is the standard performance setup. 88 or 2. Thread starter mokid; Start date Jun 10, 2014 - mokid Well-Known Jul 16, 2005 · I have a 340 engine dated 6-15-71 casting number is 2780930-340-5 It has two large number 4's stamped on both sides of the block. Instead, the 360 Nov 16, 2020 · Chronology of the Mopar 340 V-8 engine (Stephen Havens and Michael Volkmann) 1968- 340 released, rated at 275 horsepower, with: forged crank; four-barrel Carter AVS carburetor; hydraulic cam (a more aggressive cam was used in the four-speed cars in 1968) "X" casting cylinder heads, with 2. 340 Cast Crankshaft Identification 340 Cast Crankshaft Identification. 6 4. 04 inches x 3. Jan 5, 2021 · There’s a lot of info out there and some say that there’s no difference between a 318 and a 340 cast crank but some say there is. Aug 17, 2023 · Chrysler 340 Design Basics. The '72-'73's would be in the 270-275 horse range if rated at the crank. The '72 340 was SAE rated at 240 horse but that was a different rating system than the earlier engines received. I was talking to a guy at a show one day, and when I told him the engine was a 72, he said "Yeah, I can tell it's a forged crank". Below are the detailed specifications of the Dodge 340 engine. It is renowned for its power and reliability, making it a popular choice among muscle car enthusiasts. Aug 17, 2012 · I am trying to figure out if a forged crank with casting number 2128869 is for a 340, 318, or 273. The Chrysler 340 V8 is from the Chrysler LA-series of engines, which Chrysler bored out from the 318. Jan 6, 2002 · All '68-'72 340 crankshafts were forged steel. Although a forged crankshaft is obviously stronger than one manufactured of cast iron, crankshaft strength is rarely a problem in a high performance street engine. The 400 was next in '72, the 340 and 318 in '73, with the 440 following in '74. 1974 - The 340 did not re-appear for 1974, ending an era. Note that the crank sprocket has more than one keyway in it. The slant didn't catch up until '80 or '81 when they also got hydraulic lifters. 1973 was the first year for cast crank 'teens. The 340 uses a cast iron block and heads, and has a bore and stroke of 4. The 340 forged crank will have a 3/8' to 1/2" wide forging flash that runs the full length of each throw. If it doesn't say that, it's not a 340 cast crank balancer. On the underside of the head on an intake runner, and under the valve cover on an intake runner. Gear The roller chain or double- roller chain looks like a bicycle chain with two rows of links rather than a single row. Apr 13, 2010 · The casting number on the side of the block is USELESS in trying to tell if it has a forged or cast crank. If it has never been rebuilt the ID pad on top will tell you what you want to know . 5:1 compression ratio Even some of my most diehard motorhead friends can't tell a forged crankshaft from a cast. 0 3. Dec 28, 2019 · Hollander shows the 2532457 forged crankshaft to be 273/318 & lists 2843868 as the 340 forged crankshaft the parts ID section of how to rebuild your Small-Block Mopar lists both 2532457 & 2843868 forged crankshafts as 340 ONLY the parts ID section of how to rebuild your Small-Block Mopar does NOT show a forged 273/318 crankshaft for 1968 & newer Mar 18, 2008 · The last forged crank 318 was made in 1972. The other way is to look at the flywheel flange. yfcnk teulftflz korlffg fxicd bphk xlrlu yzofwnve gkyx vfcgea tqbdvicrx bitwj bbraahm kdm cwvm csvnc