3304 and 3306 Long Blocks Caterpillar


3304 and 3306 Long Blocks

Usage:

 General Service Information

GU08-04 

 
  CAT?

Technical Supplement  

 

August 2008    

3304 and 3306 Long Blocks

Long Block Selection: General Information

The purpose of this technical supplement is to help you decide if there is a Caterpillar Remanufactured long block available for a particular engine application. When making your decision, please keep the following points in mind.

Long blocks are not available for every engine application. The long blocks we do offer can, however, be used to service many applications even though the long block does not exactly match the original engine configuration. When the consist of the Reman product offering differs from the consist of a customer's engine, only the dealer and customer can decide whether or not it makes economic sense to change the parts that differ.

It's Caterpillar's policy to incorporate the latest critical engineering changes into Cat Reman products. Therefore, long blocks may be offered with some parts from a later design era as service repairs for engines from an earlier design era. An example is the 3406C crankshaft, connecting rods, and pistons which are in certain 3406B long blocks. The result is that the parts in the long blocks match each other but do not match the parts consist of new production engines, nor do they match any single parts book. When long block parts consists differ from the official parts list, Reman provides an engine plate alerting the customer to Special Instruction or Service Magazine articles for information on non-standard parts.

Make sure any future engine/long block repairs that do not use parts called for by the original parts book, or official replacements called for by parts and service sources, are carefully documented. If you choose to make any configuration or consist changes, good documentation can prevent problems the next time parts are ordered.

3300 Long Block General Information

All Reman 3300 long block offerings are of the spacer plate block design. Pre-combustion chambers are not included with the long block. If new pre-combustion chambers are needed, they must be ordered separately. Alteration of the oil supply at the rear face where the flywheel housing mounts may be necessary. Some blocks use a 1S1768 sleeve, while others use a 4B3938 plug in the oil supply hole. The flywheel housing locating dowel also varies. Some configurations use a 4L3395 and others a 2A3798 dowel. In each of these situations, the easiest way to ensure correct installation when replacing an existing block with a Remanufactured Long (or Short) Block is to use exactly the same part numbers found on the existing block. Sleeves and dowels to accommodate all applications are shipped together with the long block in a separate package. Also inspect the oil drain and supply on the right side of the block to ensure it matches the fuel injection pump supply and drain configuration.

Some long blocks are shipped with two engine oil coolers. Use the one that matches the original engine. Return both the unopened, unused oil cooler, and the customer's used oil cooler, along with the long block core. Following this rule will help avoid unnecessary add charges for missing parts.

CAUTION: DO NOT USE 3300 LONG BLOCKS IN D330C AND D333C ENGINE APPLICATIONS.

Identification of 3304

When the 0R3613 long block is used to replace a counterbore block, care must be taken to ensure the cylinder head on the long block is compatible with the old engine components. The old engine must be able to use one of the following Reman head numbers: 0R1394, 0R0821, 0R2086, 0R2674, 0R2175, 0R2672, or 0R2178. This is required because the differences between a D330C and a 3304 are difficult to distinguish. The water bypass from the cylinder head to the water pump is different. The cylinder heads are not interchangeable.

If the old engine can use any of these Reman head numbers it is a 3304 and a long block may be available based upon the cylinder pack you would use in the old engine.

The 0R3664 is a cylinder head similar to 0R2674, less the prechambers. This provides a cylinder head with inlet valves and exhaust seat inserts which are acceptable in all horsepower ranges.

Identification of 3306

When the 0R3611 long block is used to replace a counterbore block, care must be taken to ensure the cylinder head on the long block is compatible with the old engine components. The old engine must be able to use one of the following Reman head numbers: 0R1367, 0R1347, 0R1255, 0R0822, 0R2087, 0R1077, 0R2149, 0R1078, 0R2150, 0R0978, 0R2146. This is required because the differences between a D333C and a 3306 are difficult to distinguish. The water bypass from the cylinder head to the water pump is different. The cylinder heads are not interchangeable.

If the old engine can use any of these Reman head numbers it is a 3306 and a long block may be available based upon the cylinder pack you would use in the old engine.

The 0R3663 is a cylinder head similar to 0R0978, less than prechambers. This provides a cylinder head with inlet valves and exhaust seat inserts which are acceptable in all horsepower ranges.

3300 Long Block Selection:

First, make certain whether the customer's engine is a 3304 or 3306 (see the instructions and caution above). Next, determine whether it has pre-combustion chambers (PC) or direct injection (DI). Normal parts sources (parts book, microfiche, SIS, NPR, etc.) can be used to look up this information by serial number, if necessary. This will narrow down the list of long block candidates shown on the following chart.

If the customer's engine is a 3306, you will have to wait until the next step to further narrow the candidates list. Next, use normal parts sources to look up the correct current piston part number for the customer's engine. Don't forget to check NPR to make sure you are not using obsolete part numbers. If the customer's piston is not one of the numbers shown under "Piston P/N's...", Reman does not have a long block offering. If the customer's piston is shown, you should now have narrowed the candidates down to one or two columns of the chart.

Next, follow the remaining candidate columns down into the consist section of the chart. Check the camshaft, then cylinder head part numbers shown against the part numbers called for by normal parts sources to service the customer's engine. By this point you have narrowed the search down to one candidate long block part number. Now check the other part numbers listed in the same column of the consist chart. For a long block candidate to become a selection, all the part numbers listed under the long block part number should match the correct service part numbers for the customer's engine. If, at any point in the above process the Reman consist fails to match the part numbers called for to service the customer's engine, Reman does not have an offering that matches the customer's engine. You may select a long block that isnt a perfect match if you believe changing the parts that dont match is worth the time and money to do the work.

NOTE: Don't forget to read the "notes" referenced in the last column of the chart. These notes explain, among other things, important adaptability and shipping information.

 

Reman Long Block 0R3613** 0R-3612 0R-4944 0R-3611 0R-3706 0R-3610 0R-4946* 0R-4956** 0R7444
Applications  3304 PC Rect. Rings 3304 DI Keystone Rings 3304 DI 3306 PC Keystone Rings 3306 DI Keystone Rings 3306 DI Keystone Rings 3306 DI 3306 PC 3306 DI ATAAC (9TL)
Ref. Production Block Gp 9Y3209, 7N-5454 9Y3209, 7N-5454 9Y3209, 7N-5454 7N-8016,
4P-0623,
7N-5456,
8N-4776
8N-5286, 4P-0623, 7N-5456, 8N-4776, 9Y-3210,
4P-0623,
7N-5456,
8N-4776,
9Y-3210,
4P-0623,
7N-5456,
8N-4776
7N-8016,
4P-0623,
7N-5456,
8N-4776,
8N-5286,
4P-0623,
7N-5456,
8N-4776
Ref. Production Piston GP 9N5250, 2P-6270 129-0338, 165-4262, 8N-3102 129-0359, 164-6560, 4P-8132 9N-5403 156-8262, 168-4531, 9Y-8217 129-0338,
165-4262,
8N-3102,
164-6560,
129-0359,
4P-8132,
9N-5250,
2P-6270
107-3565
                   
Long Block Consist                  
                   
Block Gp-Cyl **Note H**  0R-2078 0R-2080 0R-4948 0R-2555 0R-3044 0R-2556 0R-4949 0R-3259 0R-9206
Camshaft Gp-S 1N-4436 1N-4436 1N-4436 1N-4406 7E-9777 1N-4406 1N-4406 1N-4406 198-6553
Cover Gp **Note F** 2P-6530 2P-6530 2P-6530 2P-6530 2P-6530 2P-6530 2P-6530 2P-6530 2P-6530
Cover Gp-V Mech 8N-4446 8N-4446 8N-4446 8N-4745 8N-4745 8N-4745 8N-4745 8N-4745 8N-4745
Fastener Gp 7N-9534 7N-9534 7N-9534 7N-9536 7N-9536 7N-9536 7N-9536 7N-9536 7N-9536
Gear Gp-Front **Note G** 1W-5634 1W-5634 1W-5634 1W-5634 1W-4563 1W-5634 1W-5634 1W-5634 4P-9858
Head Gp-Cylinder 8N-1454 1N-4304 1N-4304 8N-1187 8N-0266 0R2549 8N-0266 0R2549 8N-0266 0R2549 0R-3663
8N-1187
0R-4599
107-7914
Lifting Gp-Eng **Note D** 6N-8326 6N-8326 6N-8326 6N-8326 6N-8326 6N-8326 6N-8326 6N-8326 6N-8326
Mechanism Gp-V 7N-8024 7N-8024 7N-8024 7N-8026 7E-9778 10R-2400 7N-8026
10R-2401
7N-8026
10R-2401
7N-8026
10R-2401
7E-9778
10R-2400
                   
Shipped Loose Parts                  
                   
Breather As 2W-9162 2W-9162 2W-9162 2W-9162 2W-9162 2W-9162 2W-9162 2W-9162 2W-9162
Core As- Oil Clr 7N-0165 7N-0165 7N-0165 7N-0165,
7N-0110
7N-0110 0R-3501 0R-3501 7N0110 0R-3501
0R-3499
7N-0165 7N0110
0R-3501
0R-3499
7N-0165 7N0110
7N-0110
0R-3501
Pump Gp-Oil-A 6I-1346 6I-1346 6I-1346 6I-1346 0R-2560
6I-1343
0R-0920
6I-1346
0R-0920
6I-1346
0R-0920
6I-1346
0R-2560
6I-1343


* This long block does not provide coverage for engines with the 4P9857 crankshaft assembly.
** This long block can be used for 8N3180 and 8N3182 piston applications also.
D- For shipping and storage. Use the parts from the customer's original engine and return the shipping parts with the core.
F- This group is for protection during shipping and storage. The customer will remove when installing air piping.
G- The (7W-0508) fuel pump drive gear, or (9N-5760) weight assembly (used only with 0R3706), are excluded from the long block, as are their retaining bolt, and washer. If these parts need to be replaced, they must be ordered separately.
H- The crankshaft is positioned at top dead center, number one on the firing stroke, prior to shipping.

 
SELD0189

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?2008 Caterpillar

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