90 accord water pump and timing belt

[ampage8]

I have a 1990 honda accord, manual trans, 4cylinder with 356k so far. My water pump has a leak, and im considering changing the timing belt and waterpump myself. How diffucult is this? does anyone have any special direction?

[jgate]

This should give you a good start..
WATER PUMP R& I
Removal & Installation
Remove camshaft timing and balance shaft drive belts. Remove pump from engine. Clean and inspect cylinder block mating surface. Apply sealant to water pump mating surface of new seal. Install water pump and torque bolts to specification.

Tl MING & BALANCER SHAFT BELTS R & I
: Camshaft timing and balancer shaft belts are located at front of engine, on left side of vehicle. Remove balance shaft drive belt for access to camshaft drive belt. Both belts must be timed to crankshaft rotation.
Removal
Position crankshaft with No. 1 cylinder at TDC of compression stroke. Disconnect battery negative terminal. Remove splash shield. Disconnect cruise control actuator and connector. DO NOT disconnect actuator cable. Remove power steering pump without disconnecting hoses.
Disconnect alternator wiring. Remove wiring harness from valve cover. Remove alternator and A/C (if equipped) belts. Remove valve cover and upper timing belt cover. Remove side engine mount stay (if equipped). See Figs. 3 and 4. Remove engine oil dipstick and pipe. Remove crankshaft pulley bolt and pulley.
Using an engine support, remove 2 rear bolts from engine center support and lower engine to allow lower belt cover removal. Release tension from timing belts by loosening belt tensioner. Retighten tensioner adjusting nut. Remove balancer and camshaft timing Its.

: DO NOT rotate crankshaft or camshaft when removing timing belts.
A GOOD TIME TO REPLACE THE BELTS WITH NEW ONES..

Ensure crankshaft and camshaft are at TDC position for No. 1 cylinder. Install camshaft timing belt. Align groove on front timing balancer belt driven pulley with pointer on oil pump body. Align rear timing balancer belt driven pulley by inserting a 6 x 100 mm bolt (or equivalent) 74 mm into alignment access hole.
Install balancer shaft belt. Loosen tensioner adjusting nut (if necessary) to install belt. Adjust belt tension. Reverse removal procedure to complete installation. Torque crankshaft pulley bolt to specification.

TENSION ADJUSTMENT
With valve cover removed, ensure piston No. 1 is at TDC and belt tensioner adjusting nut is loose. Rotate crankshaft COUNTERCLOCKWISE 3 teeth on camshaft pulley to apply tension to timing belt. Tighten belt tensioner adjusting nut .

Hope this helps.[attachment=1]

[crank.it]

hi ampage-difficulty depends on your ability...if you donot have some tools and a little skill then this isnt a job for the novice....balance shafts and timing marks have to be dead on or damage can result from pistons smacking a valve...also some specail tools are handy...if its a dual cam then a cam tool is much needed to hold cams spot on....I also think the oil pump is incoporated with the belt system and should be adressed along with the water pump....if you have some know how and the will get a book and have at it...get stuck and give us a shout....crank.it

[reinaldo]

"TENSION ADJUSTMENT
With valve cover removed, ensure piston No. 1 is at TDC and belt tensioner adjusting nut is loose. Rotate crankshaft COUNTERCLOCKWISE 3 teeth on camshaft pulley to apply tension to timing belt. Tighten belt tensioner adjusting nut ."

Thank you for this detailed tips. I had problems with the tension part of my car and I can't adjust it properly til you provided this detailed steps.

[rainandsun]

actually the replacement of water pump and timing belt is kinda little bit easy and difficult. if you're a professional mechanic you will find it easy but if you're just going to start in doing some technical work, you'll find a little bit difficult. hope that this will help you in replacing this two parts.

here's how to replace a timing belt procedure:
1. remove any shrouding in the wheel so you can access the crankshaft snout and the lower timing belt.
2. find the marks for timing belt, can be found on the flywheel and cam, and set them both to TDC, the mark or the flywheel tdc mark can be access in a hole in the bellhousing. The camshaft TDC is easy to find -- especially if you add white paint as we did.
3. Support the engine with some sort of skyhook if you need to remove the rightside motor mount. Some belts are installed with a mount in their center, making changing them problematic. Release any belt tension by freeing up the belt tensioner pulley.
4. Slip the new belt into place without disturbing the cam or crank pulleys, or the engine will be out of time. Check by slowly rotating the crank two full turns with a socket on the crank snout.

here's the procedure on how to replace water pump
1. Slide the new belt into position without disturbing the cam or crank pulley or the engine is too late. Check the lever slowly to a full two turns crank snout taken.
2. To remove the fan and fan clutch, start the fan cover (if any) and moves it inside the fan. Remove the screws from the fan and the fan and take the hood together. If the vehicle has a clutch fan, you might consider replacing at this time. The fan clutch should always be placed face to prevent damage and ensure proper operation. Check the fan for cracks, bent blades or other defects. Do not attempt to repair a damaged fan, always replace it.
3. Remove other components needed to pump water available. This would include belts, alternator, power steering pump and air compressor. It is not always necessary to remove the pipes or the son of these components usually you can just get them out of the way - just put them out of the way. Contact your auto repair manual for specific instructions on engines where parts such as timing belts should be disturbed. Remove any water heater and bypass hoses connected to the water pump. At this point, remove all thread pipe fittings in the pump.
4. Remove the water pump attaching bolts, noting their lengths and positions for correct replacement. Remove the pump from the engine.
When You're Done:

Look over the entire system for leaks after it has reached operating temperature, with the radiator cap installed.

After the engine has run for at least 15 minutes, turn it off and recheck the belt tension. Retighten as necessary.

Check the antifreeze protection level. A 50/50 mixture will give the best protection against winter freezing and summer boil over.

Check the operation of the heater. If it doesn't function correctly, allow the engine to cool and recheck the coolant level.

Road test the vehicle to make sure the coolant remains in the specified limits. Also check the operation of the other components that may have been removed or loosened during this procedure involved (power steering, air conditioning, etc.)

Some cooling systems require bleeding the air out. Refer to the appropriate service manual for the location of the cooling system bleeder screw and proper bleeding procedure.

hope that this helps.