Quick Answer: Are All 5.9 Cummins Blocks The Same?

Is a 12 or 24 valve Cummins better?

The 12-valve went away in 1998, replaced by a 24 valve which offered better breathing.

But undeniably, of all Cummins pickup truck engines, the 12-valve 5.9-liter is the king.

Cooper from Diesel Power Products says “It’s probably the most reliable platform ever made on any diesel truck.”.

What Cummins block is bad?

The second potentially deadly flaw occurs in ’99 to ’02 5.9L Cummins 24-valve engines. It’s known as the 53 block problem, because these engine blocks have the number 53 cast into the side of the crankcase. After years of use, the 53 blocks tend to crack until coolant starts to pour out the side of the block.

Is a 5.9 or 6.7 Cummins better?

Since the 5.9l is an older engine, you would expect it to be somewhat less efficient. However, due to the more stringent EPA emission rules, the 6.7l has additional filters and redactors. This makes it cleaner, sure, but the tradeoff is a noticeably lower fuel economy.

Is the 5.9 Cummins a good motor?

5.9L Pros & Cons Fixed geometry turbo is more reliable than the 6.7L’s variable geometry unit. No emissions equipment other than catalytic converter. More sealing area + less cylinder pressure than the 6.7L (torque) = fewer head gasket failures.

How long will a 12 valve Cummins last?

Cummins recommends a rebuild at 300k when the 12 valve is used in other applications such as tractors. gensets, etc but makes no recommendations when it’s in a Dodge pickup.

How many MPG does a 5.9 Cummins get?

29 MPG highwayWe own five Dodge 4×4 pickups with the 5.9L Cummins, and we are thrilled with all the trucks. All five trucks we own average 29 MPG highway, and 24 MPG in town. Cummins 5.9L has the fuel economy, speed, and the power to pull.

What’s wrong with a 53 block Cummins?

The # 53 block casting has inherently thin water jacket walls that are susceptible to cracking. Frequent and/or heavy towing, failing to let an engine properly warm after a cold start, and engine overheating can contribute to the development and propagation of cracks in the water jackets of these engine blocks.

Do 2002 Cummins have 53 blocks?

The Cummins “53” Block was used in Cummins 24 valve ISB diesel engines from 1998.5-2002. Manufactured by Brazilian company, TUPY. The “53” block casting has thin water jacket walls that are susceptible to cracking.

How many miles can a Cummins last?

350,000 milesThe engine may last forever. The DODGE (or maybe Cummins) website speaks about the TD lasting 350,000 miles (mean) between overhauls, 100,000 miles longer than the GM or FORD.

How long will a 5.9 Cummins last?

The longevity of a cummins depends on preventive maintenance. The more you take care of it the longer it will last. They hold power well and if monitored properly will last longer than you will. Average mileage is between 17-22 depending on configuration and how you drive.

Can you put a 24 valve head on a 12 valve Cummins?

Registered. all you need to do to run a 24v head on a 12v block, is switch pistons….. the injection system you wish run on this motor then decides what else u need…. Actually they are far from identical and not all are interchangable. Also, the cam sensor has no affect on the block.

Can you put a 12v head on a 24v Cummins?

I have done this and yes you can use a 12v head on a 2nd gen 24v block without any mods. You will have to use a 12v head gasket, push rods, head bolts or studs, 12v inj’s and a 12v exhaust manifold.

How many miles is too many for a 5.9 Cummins?

Dodge states that the Cummins is good for 350,000 miles before major overhaul. Chevy and Ford say 250,000 miles for their diesels.

Are 12 valve and 24 valve blocks the same?

The 24 and 12 valve blocks are not compatible. The pistons have different combustion chamber designs, the crankshaft in the 24 valve is different and has a tone ring so the 12 valve lift pump will not fit, and the list goes on and on.

What year 5.9 Cummins is best?

1994-1998 2500 & 3500 As far as performance potential goes, it doesn’t get any better than the mechanical P7100 equipped versions of the 12-valve 5.9L Cummins. They’re simple, rock-solid reliable, and can easily tick off a half a million miles if properly maintained.

11 Reasons Why the 12-Valve Cummins Is the Ultimate Diesel Engine. A simple design with unmatched reliability, tremendous performance potential and rugged, million-mile durability sums up the appeal of the 12-valve 5.9L 6BT Cummins.

What is so great about the 12 valve Cummins?

What made the Cummins so popular was the fact that its peak power and torque was insanely usable—in fact, the redline is only at 3,000 RPM! The 12-valve was able to get respectable fuel economy while producing torque figures never-before seen in an ordinary pickup truck.

What is the best year Dodge Cummins to buy?

1989-1993 Dodge Ram 2500 and 3500 – Timeless Diesel. … 2003-2008 Dodge Ram 2500 and 3500 Heavy Duty – Best Used Diesel Value. … 2010-2013 Ram 2500 Heavy Duty – Most Capable Diesel. … 1999-2003 Super Duty – Best Budget Diesel. … 2008-2010 Super Duty – Best Diesel to Modify.More items…•