Water Pump & Thermostat Replacement DIY (4 CYL) - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 17 Old 08-08-2016, 04:01 PM Thread Starter
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Water Pump & Thermostat Replacement DIY (4 CYL)

The following link has a DIY guide for water pump and thermostat replacement for a 4CYL 2007 Accord. It is a pretty easy job and might be a good "starter" repair for someone interested in getting started doing their own repairs. The only challenging aspect is probably the tight spaces which might require some different length sockets and/or wobble extensions.





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post #2 of 17 Old 08-08-2016, 04:25 PM
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Another excellent write-up from JohnNH! Thank you!

Question: Did the new water pump come with a new gasket or did you have to order separately?

To confirm: No gasket sealer or HondaBond was used, correct?

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post #3 of 17 Old 08-08-2016, 04:30 PM Thread Starter
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Thanks Rick, Good question - the new water pump (OEM) included the new gasket. It is an O-Ring style gasket, which is nice because it comes off cleanly with no residue and also stays captive in the water pump so there is no problem holding it in place. And correct, no use of Hondabond is advised in the service manual, and I didn't use any.
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post #4 of 17 Old 08-08-2016, 04:57 PM
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did you use OEM parts? that tensioner didin't look like an OEM replacement.

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post #5 of 17 Old 08-08-2016, 05:18 PM Thread Starter
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Yes, the water pump, tensioner and thermostat were all OEM from HondaVillageParts.

Slightly unrelated, but there were two part numbers that came up for the tensioner when I entered my year/model:

31170-RAA-A02 $64
31170-PNA-023 $95

I ordered the first (cheaper) one but was informed it didn't match my VIN so I switched to the more expensive one. Does anyone know the difference between these parts? (My VIN is a J - VIN, JAPAN manufactured and I am wondering if that is the difference?).
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post #6 of 17 Old 08-08-2016, 05:23 PM
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Some are made in Japan and take the more expensive variation of parts. Mine isn't and the parts are cheaper when there is an option.

2005 EX-L Sedan, i4 + Automatic. over 185K and counting. runs like a clock.
V6 TL-S fsb/rsb
V6 battery upgrade
V6 strut bar
Weathertech floor liners
Tinted windows
New vtec gasket
New dipstick o-rings (thanks qman)
Penzoil Platinum 0W20
Fram ultra synthetic oil filter
Supertech -20*F washer fluid

Most meticulously maintained accord on this site

Quote:
An interference engine is one which interferes with your wallet if you don't keep a solid timing belt in it. -qman
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post #7 of 17 Old 08-08-2016, 11:40 PM
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Very, very nice write up. Very detailed, little more than, say an alternator. Good pics. Vote for a sticky! Thank you.
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post #8 of 17 Old 08-09-2016, 06:06 AM
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was this preventative maintenance?

2005 EX-L Sedan, i4 + Automatic. over 185K and counting. runs like a clock.
V6 TL-S fsb/rsb
V6 battery upgrade
V6 strut bar
Weathertech floor liners
Tinted windows
New vtec gasket
New dipstick o-rings (thanks qman)
Penzoil Platinum 0W20
Fram ultra synthetic oil filter
Supertech -20*F washer fluid

Most meticulously maintained accord on this site

Quote:
An interference engine is one which interferes with your wallet if you don't keep a solid timing belt in it. -qman
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post #9 of 17 Old 08-09-2016, 06:41 AM
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Nice write up! Now the real question is... What wrench is that?? That would have made life 100% easier!!

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post #10 of 17 Old 08-09-2016, 08:13 AM
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That's an amazing write-up. Thank you.

Hopefully most of it applies to my '04 LX if the time ever comes. I don't know if thermostat or pump have ever been replaced on it.

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post #11 of 17 Old 08-09-2016, 05:07 PM Thread Starter
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Originally Posted by chris918 View Post
was this preventative maintenance?
Yes, exactly. The coolant and water pump had 140K miles on them and I figured I would just do both as PM. My original water pump failed at around 200K miles.
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post #12 of 17 Old 08-09-2016, 05:10 PM Thread Starter
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Quote:
Originally Posted by Soler25 View Post
Nice write up! Now the real question is... What wrench is that?? That would have made life 100% easier!!
Do you mean the ratchet? It is a GearWrench product:



It is a nice ratchet. In addition to the handy flex head, it has a very fine toothed gear so you can ratchet even in a very tight spot where you can't get much motion in the handle due to obstructions.
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post #13 of 17 Old 08-09-2016, 05:27 PM
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Nice write up, John. Did you happen to spin the old pump by hand? If so, how did it feel?

2003 LX Sedan, i4 + Automatic. 201K and counting.
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post #14 of 17 Old 08-09-2016, 05:36 PM Thread Starter
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Thanks Drew, Yes, actually it didn't feel bad to me. It spun smoothly. There was a very slight amount of play compared to the new one. On my first water pump that failed at 200K miles, it started making a clattering sound, audible even at idle, and there was very considerable play in the bearing when pushing on the pulley. If it was more expensive, I probably wouldn't have replaced it, but for about $65 it seemed reasonable to replace it with 140K miles on it while I was changing the coolant.
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post #15 of 17 Old 11-07-2016, 05:54 PM
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Thanks for the writeup. I followed this procedure when replacing my water pump and thermostat.

I made a video on the procedure, just for future reference:




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