Thermostat housing removal and replacement instructions

SZALKUSKT

MEMBER
2004 ACURA TSX
4 CYL
2WD
AUTOMATIC
150,000 MILES

I am working the vehicle listed above Vtec. I am changing the thermostat and the thermostat housing. Also I removed the plenum for the intake to gain access to the thermostat housing. I would like the procedures from the shop manual to remove and replace the thermostat and it's housing along with torquing the intake back down. (2 bolts and 3 nuts I believe). I am also if there is anything to be careful about when putting the metal water bypass pipe back into the new plastic thermostat housing. Thanks. Any manual steps/ procedures to help me re install the thermostat and the thermostat housing along with the intake plenum would greatly help. Thanks in advance.

Wednesday, May 27th, 2020 AT 11:08 PM

7 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Here is the information you requested.Here are a few basic tutorials for you to view for thermostat and intake manifold gasket replacement.

https://www.2carpros.com/articles/replace-thermostat

https://www.2carpros.com/articles/replace-an-air-intake-boot

https://www.2carpros.com/articles/replace-intake-manifold-gasket

I've attached picture steps as well below for your Acura for thermostat and intake manifold replacement. Hope this helps and thanks for using 2CarPros

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Thursday, May 28th, 2020 AT 4:52 PM

SZALKUSKT

MEMBER
274 POSTS

This will help a bunch. Thanks. There is just one more item maybe I did not stress that I am doing. I am replacing the housing that the thermostat (image 2) bolts to. The housing is bolted to the engine. It suffered a crack and was leaking where the metal water pipe pushes into the housing. I was wondering what the torque is for the plastic housing to the engine itself. So just to be clear, I am replacing the thermostat assembly and also the housing with the two provisions for the metal tube and molded rubber water bypass hose. Therefore I need the torque value and any procedural steps to install the plastic thermostat housing to the metal block. The installation bolts point towards the passenger side unlike the thermostat itself which points aft. Thanks in advance.

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Saturday, May 30th, 2020 AT 1:50 AM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

So, I've re-attached image 2 below. I've circled in red the housing you speak of needing additional instructions? Let me know and thanks again for using 2CarPros.

Danny-

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Saturday, May 30th, 2020 AT 2:03 AM

SZALKUSKT

MEMBER
274 POSTS

Hello Danny,

Yes, the housing that you circled is the housing that I need additional instructions for.

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Saturday, May 30th, 2020 AT 11:46 AM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

That is called the water passage and is bolted directly to the water pump. I've attached picture steps again below. These steps show the removal of the whole water pump assembly but me personally would just replace the water passage instead of the whole water pump assembly. You will see by the pictures. Hope this helps and thanks again for using 2CarPros.

Danny-

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Sunday, May 31st, 2020 AT 3:20 AM

SZALKUSKT

MEMBER
274 POSTS

Hi Danny,

Thank you for all of the replies and help for working on the vehicle listed above. I finished the job and with your information, the leak is repaired and the cooling system is working great now.I really needed the diagrams and torque values. Thanks again!

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Saturday, June 6th, 2020 AT 9:44 AM

DANNY L