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Old 11-26-2011, 09:45 AM   #1
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Default List of Parts, Seals and Hoses to Change when Swapping Engines - 3.2 & 3.5

Hoses

Let’s not forget, our cars are now over 15 years old. Hoses are made of rubber. You wouldn’t trust 15 year old tires so why would you trust 15 year old hoses? Secondly, removal of the old hoses from their associated nipples causes irreparable stress to the hose. For instance, just grab an old hose and bend it, you can hear the brittle nylon cords inside of it breaking just from flexing the hose. Also, the only proper way to remove the hoses from the heater core nipples without bending them is to cut the hoses off. Thirdly, you’re probably replacing your motor because it had an SHG or a BHG. When exhaust gasses enter the coolant it starts a chemical reaction which turns it acidic. The hoses begin to weaken and bloat eventually bursting. Even if you caught the SHG early the chemical reaction has probably already weakened the hoses. When I change any motors at my shop I highly recommend changing all hoses. If the customer refuses to change them, then I will refuse to warranty the job!

I recommend getting the hoses directly from the dealer. Most hoses, believe it or not, are cheaper than getting them from the aftermarket. Also, aftermarket hoses are usually not the correct size. The Legend uses metric size hoses and the aftermarket are usually SAE fractional.

The hose lists vary depending on which type of swap you're doing. The 3.5 swap eliminates the water pump hoses and differential cooler hoses. Performing a throttle body coolant bypass eliminates 2 more hoses. We'll start with the hoses you will need for any swap.

Upper and Lower Radiator Hoses
  • 19501-PY3-000, C32/C35, Upper Radiator Hose, 91-95 Legend
  • 19502-PY3-000, C32/C35, Lower Radiator Hose, 91-92 Legend *See Note
  • 19502-PY3-010, C32/C35, Lower Radiator Hose, 93-95 Legend *See Note
*Note: Because of the subframe differences the lowest bend on the 93-95 lower radiator hose is slightly longer. The 93-95 hose does work on 91-92 Legend, but there is a danger the hose can rub on the belts.

Heater Core / Water Valve Hoses
  • 79721-SP0-A00, C32/C35, Water Valve to Heater Core
  • 79722-SP0-A00, C32/C35, Driver's Head Nipple to Water Valve
  • 79725-SP0-A00, C32/C35, Heater Core to Pipe Under Manifold

Fast Idle Valve Hoses (3.2 Type I/II Intakes Only)
  • 19522-PY3-000, C32/C35, Fast Idle Valve to Driver's Side Head Nipple
  • 19523-PY3-000, C32/C35, Fast Idle Valve to Pipe Under Manifold

EACV/IACV Idle Valve Hoses
  • 19524-PY3-000, C32/C35, IACV to Intake Manifold Water Bypass
  • 19525-PY3-000, C32/C35, IACV to Throttle Body (Goes directly to thermostat housing if doing throttle body coolant bypass)

Throttle Body Hoses. Change these hoses if you are NOT performing a bypass.
Without Traction Control (TCS):
  • 19526-PY3-000, C32/C35, Throttle Body to Pipe
  • 19527-PY3-000, C32/C35, Pipe to Thermostat Housing
With Traction Control (TCS):
  • 19528-PX9-A00, C32/C35, Throttle Body to Pipe
  • 19527-PX9-A00, C32/C35, Pipe to TCS Throttle Body
  • 19526-PX9-A00, C32/C35, TCS Throttle Body to Thermostat Housing

C32 ONLY Differential Cooler Hoses - NOT Used on 3.5 Swaps
  • 41127-PY4-G01, C32 ONLY, Upper Differential to Block
  • 41128-PY4-000, C32 ONLY, Lower Differential to Pipe

C32 ONLY Oil Cooler Hoses - NOT Used on 3.5 Swaps
  • 19423-PY3-000, C32 ONLY, Pipe To Water Pump, 1 & 2 Outlet Water Pumps.
  • 19421-PY3-000, C32 ONLY, Upper Oil Cooler to Water Pump, 2 Outlet Water Pumps Only
  • 19422-PY3-000, C32 ONLY, Lower Oil Cooler to Pipe, 2 Outlet Water Pumps Only

C35 Only - Engine Block Coolant Drain Pipe
  • 19515-P5A-000, C35 ONLY, Drain Pipe Plug Cap
  • 91311-PH7-003, C35 ONLY, Drain Pipe O-Ring

Heater Control / Water Valve

If you are changing the heater hoses it is highly suggested to change the water valve. The thermoplastic that the valve is made of can become extremely brittle without you even realizing it. I've had valves in my hand that held the hose clam just fine but literally crumbled under light finger pressure! If they are discolored at ALL replace!

Water Valve:
  • 79710-SP0-A04, C32 & C35 VALVE ASSY., WATER
NOTE: There are 2 different types of water valve brackets. One is rubber isolated and the other is direct bolt on. The valves are only sold with the rubber isolated bracket. If you have a direct bolt on, simply change the bracket over.


Thermostat

This is a given. The thermostat is a wear item with metal to metal contact prone to binding and rubber seals to bloat up – especially if you had acidic coolant from a BHG. If your replacement motor has been sitting for a while, its thermostat has probably dried out and seized shut.

Thermostat:
  • 19301-P8E-A10, C32/C35 THERMOSTAT ASSY. (NIPPON THERMOSTAT)

Timing Belt & Water Pump

Timing belt and water pumps should be replaced every 90,000 miles. The C35 and C32 water pump are completely different. The C35 includes a balance shaft belt that should also be changed.

C32
  • 14400-PY3-004, C32 ONLY, 3.2 Timing Belt
  • 19200-PY3-010, C32 ONLY, 3.2 Water Pump 2 Outlet*
  • 19200-PY3-A00, C32 ONLY, 3.2 Water Pump 1 Outlet*
  • 19313-PY3-000, C32 ONLY, Waterpump to Thermostat Housing O-ring Gasket
*Note: 2 Outlet water pumps are used on all 91-92 Legends and all 93-95 Legend with Type II motor . 1 Outlet pumps are used only on 93-95 Legend Type I's. The difference is whether the engine is equipped with an oil cooler (2 outlet) or not (1 outlet).

C35
  • 14400-P5A-004, C35 ONLY, 3.5 Timing Belt
  • 13440-P5A-004, C35 ONLY, 3.5 Balance Shaft Belt
  • 19200-P5A-004, C35 ONLY, 3.5 Water Pump - All 96-04
  • 19313-P5G-000, C35 ONLY, Waterpump to Thermostat Housing O-ring Gasket


-Matt
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Last edited by sr5guy; 11-27-2011 at 09:42 PM.
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Old 11-26-2011, 09:46 AM   #2
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Mandatory Seals

These seals MUST be replaced if you're removing the motor. These seals can only be accessed with the transmission, differential or engine removed. Any time a car leaves my possession these seals MUST be replaced! Note that the rear main seal rarely leaks, but the back cover of the block (that contains the rear main seal) is prone to leakage. Replacing the rear main seal without replacing the o-ring and RTV Hondabond gasket is futile.

Differential Seals
I demand you to replace these differential seals as they are highly prone to leakage. Same for A/T & M/T differential.
  • 91209-PY4-003, C32A/C35A Differential, Differential Input Shaft Seal
  • 91206-PY4-004, C32A/C25A Differential, Passenger Side Axle Seal

A/T Input Shaft
I demand you to replace this seal if you have an Automatic Transmission. It is located behind the torque converter.
  • 91207-PY4-004, Auto Trans Front Input Seal

Rear Main Seal
I demand you to replace the rear main seal & cover gasket if you see any significant leakage:
  • 91214-RNB-A01, C32/C35A, Rear Main Seal
  • 91302-PY3-000, C32/C35A, Rear Timing Cover O-Ring
  • 13555-P5A-000, C35A ONLY, Rear Balance Shaft Cover O-Ring
  • 1 Tube Honda Bond

Highly Suggested Seals

These following seals should be replaced as preventative maintenance.

Oil Pan & Tube Gaskets

These o-ring seals go on the tube that goes through the oil pan and carries the intermediate shaft to the differential. They are suggested to change.
  • 94109-14000, C32A/C35A, Oil Pan Drain Plug Washer
  • 91331-PY3-000, C32A/C35A, Differential to Oil Pan O-RING (58.4X3.1)
  • QUANTITY 2: 91332-PY3-000, C32A/C35A, Oil Pan Shaft Pipe O-RING (47X3.1)

C32 Oil Cooler

Only the 3.2 motors had an oil cooler which is located directly above the oil filter on the oil pump housing. The oil cooler o-ring seals are prone to leakage on the front of the motor. They are easy to replace if leaking. Note that even if the motor is not equipped with an oil cooler, there is a cover in it's place that uses the same gaskets and that is just as prone to leakage!
  • 91304-PY3-000, C32 ONLY, Oil Cooler o-ring bolt
  • 91305-PY3-000, C32 ONLY, Oil Cooler o-ring body

Camshaft & Valve Cover Swap

Replace these seals when changing the valve covers & cams, for instance for a 3.5 Hybrid Swap. The Fel-Pro Valve Cover Gasket Set, available in most aftermarket parts stores, is the ideal near OEM-Quality replacement without ordering individual parts from the dealer. NOTE: All of these following parts are included in the FEL-PRO head gasket set.
  • VS50448R, C32A/C35A, FEL-PRO Valve Cover Gasket Set. Contains: 2 Valve Cover Gaskets, 8 Valve Cover Grommets, 6 UPPER Spark Plug Tube Seals, 2 Rear Camshaft Rear Plug Seals.
  • QUANTITY 2: 91213-PY3-003, C32A/C35A, Camshaft Front Seals
  • QUANTITY 6: 91301-PT0-003, C32A/C35A, Rocker Arm LOWER Spark Plug Tube Seal
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Last edited by sr5guy; 11-28-2011 at 10:00 AM.
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Old 11-26-2011, 09:48 AM   #3
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Fluids & Supplies

Depending on what you drain, this is the list of fluids you will need:

QUANTITY 5 QUARTS: 5w-30 Motor Oil (brand of your choice)
QUANTITY 3 PINTS: HONDA Power Steering Fluid
QUANTITY 2 QUARTS: Valvoline 80W90 Synthetic Blend Gear Oil
QUANTITY 5 QUARTS: AUTOMATIC TRANS, Castrol Import Synthetic Transmission Fluid *DO NOT USE NEW ATF FROM DEALER!!!! It is too thin for our cars!!!
QUANTITY 3 QUARTS: MANUAL TRANS, 10W30 Motor oil -OR- HONDA M/T Fluid -OR- Valvoline Synchromesh Fluid
QUANTITY 2 GALLONS: 50/50 Water/Coolant mix of your choice. NOTE: OEM Dealer Type2 Blue Coolant comes pre-mixed. BMW blue coolant is a suitable replacement and comes concentrated.

Still more to come!
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Old 11-26-2011, 10:42 AM   #4
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Awesomeness...times 300
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Old 11-26-2011, 10:54 AM   #5
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Great info Matt!!
I wish this list was around when I did my 3.5
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Old 11-26-2011, 11:14 AM   #6
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excellent information as all-ways Matt!
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Old 11-26-2011, 11:51 AM   #7
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Interesting! After all the research that I've done in the last 2 weeks, I feel like I could write this up myself. I do have several questions, but I will wait until you've finished the rest of this thread first. Looking forward to it!
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Old 11-26-2011, 12:57 PM   #8
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Were was this list a week ago wen I was ordering all my hoses lol
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Old 11-26-2011, 01:20 PM   #9
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^^^^^
dont u work with the man
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Old 11-26-2011, 06:47 PM   #10
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I'm glad to see this thread has arrived. I have a box of empty bags I was going to list out but never did.

Looking forward to the list of seals and seal kits develop!

rich
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