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Dorman 902-689 Engine Coolant Thermostat Housing

Curated from 68 real Reddit conversations

Refreshed on: December 5, 2024

Dorman 902-689 Engine Coolant Thermostat Housing

Brand: Dorman

Price: $4

Snoop Score:

7.2

Sentiment

6.9

Popularity

6.3

Technical

7.1

Buy on Amazon for $4 See All Thermostat Housings Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Dorman 902-689 Engine Coolant Thermostat Housing is a high-quality replacement part designed to fit select vehicle models, ensuring optimal engine performance by regulating coolant flow. Consumers have reported that this aluminum housing is a cost-effective solution compared to OEM parts, with feedback highlighting its reliability and durability, such as a user stating, "I replaced my thermostat housing with a cheap aluminum Mitzone one from Amazon when I first got the car and I've driven 10Kish miles since with no issues." Many users have praised the easy installation process and the absence of leaks when properly fitted, with comments like, "I never had to use a drop of silicone for the housings or the crossover pipe and no leaks at all." Given the positive feedback on its performance and durability, the Dorman 902-689 Engine Coolant Thermostat Housing comes highly recommended for those seeking a reliable replacement in their vehicle's cooling system.

Not for you? Check out our other rated Thermostat Housings

So far so good.
Positive Feedback

Don't really see too much value in the housing. Never had a housing go bad.
Negative Feedback

7.2

Dorman 902-689 Engine Coolant Thermostat Housing

Buy on Amazon for $4

Routine Maintenance Replacement

10 / 10

Performance Upgrades

9 / 10

OEM Restoration Projects

6 / 10

Universal Retrofits

8 / 10

See how this compares to all Thermostat Housings

What it does well!

Key strengths users can’t stop talking about.

Cost-effective alternative to OEM parts

“So far so good.”➕

“Is the Dorman all aluminum water pump better than the oem? Does anyone have any experience?”➕

“He said he doesnt recommend retail brand parts (Autozone etc) due to durability breaking within the year in general”➕

“Dorman or acdelco professional series is the way 2 go.”➕

Reliable performance over time

“I went with an A-Premium aluminum thermostat housing and haven't had any leaks in about 5k miles, so I'm past the bad reviews milage where it just didn't seal at all.”➕

“I replaced my thermostat housing with a cheap aluminum Mitzone one from Amazon when I first got the car and I've driven 10Kish miles since with no issues.”➕

“The Water pump (WP) is an electric WP and the main this that fails in it is.... wait for it.... the electronics.”➕

Reliable parts for fixing OEM issues

“They are basically the only company left that make's good parts for this car.”➕

“Personally I am glad they are around making what they make.”➕

Decent pricing for niche market solutions

“the Prices are decent enough to make it not seem like they just want to gouge people for the privilege to have decent parts for their cars.”➕

Easy direct swap installation

“It’s was a tight fit getting it in there but was pretty straight forward direct swap.”➕

Durable aluminum construction

“Replaced this twice on my Dodge Journey. This most recent time I did the aluminum one like you have pictured here because the first time I did the plastic one to match the OEM but it cracked again a little over 2 years later.”➕

“I’m putting one in the charger asap I would highly recommend”➕

No leaks reported with proper installation

“I never had to use a drop of silicone for the housings or the crossover pipe and no leaks at all.”➕

Aluminum housing offers durability

“It is coming out of the front either from the Thermostat housing joint, or the crossover pipe joint.”➕

Durable aluminum housing

“Seems like all the plastic ones crack.”➕

“I replaced three before getting the aluminum one.”➕

“Get the aluminum one. DO NOT install a plastic thermostat housing. It will always leak.”➕

Cost-effective alternative to plastic housings

“More expensive for sure but durable.”➕

Cost-effective alternative to plastic parts

“Getting a replacement for that will cost under $30 from your local auto zone.”➕

Aluminum construction recommended over plastic

“Do not get the plastic replacement. Find the alluminum one.”➕

“Forget the plastic - GET THE ALUMINUM. Money well spent.”➕

“Motorcraft for a normal replacement, dorman makes an aluminum version.”➕

Metal construction prevents coolant leaks

“Yes, the metal water outlet (thermostat) housings will prevent this problem from happening again.”➕

“It's not the gasket, it's the housing itself - the factory water outlet housings are brittle plastic and literally crack apart, causing coolant leaks.”➕

“Make sure it comes with a new sensor. Metal is probably better.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Questionable value and durability

“Don't really see too much value in the housing. Never had a housing go bad.”➕

Potential for leaks and failure

“Mine actually went bad. Tiny pin hole. Buy a new one, naw. JB weld to the rescue!”➕

“Dorman, from my experience, is not a reliable brand”➕

Leaks are a common issue

“I heard that the plastic cracks overtime and leaks and I’ve heard that the metal tends to not seal properly and leaks.”➕

Plastic parts prone to failure

“the biggest failure point on that car.”➕

“Most plastic parts, electrical parts... Nope.”➕

Common issue with leaks

“Thermostat housing coolant leak I heard that this was a common issue and i was wondering if anyone knew where to find the oem gasket piece that i need to replace.”➕

“Unfortunately, it looks like it's time to replace the intake manifold gasket. Very common issue.”➕

Issues with sealing on aluminum housing

“Has anyone else done this and had this rubber grommet plugging an unused port leak after.”➕

Common leaks reported with installation

“Sometimes if you change your thermostat and not your radiator hose it will blow a hole in your hose or radiator.”➕

Plastic parts prone to cracking

“And who can say whether or not there may have been a casting or molding flaw in the part?”➕

Common issue with parts failing

“Fate decided that it was time for it to crack in my wife's Pacifica lol.”➕

Concerns about sealing and installation issues

“I bought the MITZONE brand and it didn't seal properly.”➕

Common issue with leaks reported

“Have installed same new 2013 sonic 1.4 thermostat housing (from Amazon) twice now and it leaks right where chrome steel pipe connects w/ 2 bolts at front of housing.”➕

Quality concerns with Amazon replacement parts

“A better quality part might be the solution.”➕

Compare On All Talked About Dimensions

Product Name	Price	Score	See Details	Buy Now
KAKO Thermostat Housing Assembly for Ford Explorer & Mercury Mountaineer	$25	8.3	Details	Buy
Dorman 902-689 Engine Coolant Thermostat Housing	$4	7.2	Details	Buy
A-Premium Engine Coolant Thermostat Housing Water Outlet	$17	7.0	Details	Buy
Dorman 902-1010 Engine Coolant Thermostat Housing	$7	6.7	Details	Buy
Dorman 902-2081 Engine Coolant Thermostat Housing	$11	6.1	Details	Buy
PQY Swivel Neck Thermostat Housing for K Series	$32	6.0	Details	Buy
COOL STAR Engine Coolant Thermostat Housing 2782000815	$82	5.9	Details	Buy
Dorman 902-1001 Engine Coolant Thermostat Housing	$13	5.8	Details	Buy
QLZOZB Engine Coolant Thermostat Housing Case with Gasket	$16	4.5	Details	Buy
General Motors Genuine GM 12597172 Engine Cooling Thermostat Housing	$99	3.1	Details	Buy
Acupress Engine Cooling Thermostat Housing Replacement	$22	2.2	Details	Buy

Core Power Plays

The specs and strengths that make it shine.

Discussion on the benefits of aluminum vs. plastic thermostat housings

“Which thermostat housing would you get? New one installed by shop is already leaking again.”➕

“I think there was a different engine that came with the metal one that fits but I don’t remember which one.”➕

Discussion on brand preferences for thermostat housing

“Motorcraft for the housing, thermostat, and sensor.”➕

“I will third motorcraft parts.”➕

Discussion on the effectiveness of metal housing

“Go with the all metal housing which should be more durable in the long run.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’

Common fixes for thermostat issues

“It’s a common problem that only costs $6 to fix.”➕

Discussion on keeping old OEM parts

“And yes I seriously have kept them.”➕

Importance of clean mating surfaces for installation

“Make sure the mating surface to the seal on both the thermostat and housing is clean and flat.”➕

Difficulty in finding specific replacements online

“Cracked thermostat housing on '91 Suzuki Carry So this weekend I was replacing my radiator and thermostat in my carry, and I torqued down the bolts on the upper thermostat housing too hard and cracked it :(”➕

“I wish measurements would be posted.”➕

Discussion on replacing rubber grommets

“Me and my dad went to O'reileys, they looked up various o-rings and ordered them next day and we changed it out”➕

Discussion about OEM parts vs aftermarket solutions

“If the part isn't leaking it's only as good as the heater installed in it.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.

Discussion on aluminum vs. plastic housings

“One of my JKs has been throwing the thermostat rationality code recently, and I'm torn between trying one of the less expensive aluminum housings or trying to track down a Mopar plastic one.”➕

“I think I’d rather go with the more robust material.”➕

Discussion on intake manifold replacement due to leaks

“Since it’s leaking from the bottom of the crossover and not the top where the outlet installs, it’s intake manifold replacement time.”➕

“Would it be just like a gasket or is it the entire intake manifold that would need to be replaced?”➕

“Save yourself the trouble and replace the manifold”➕

Experiences with different thermostat brands

“the original plastic one lasted 350k kms”➕

Debate on the advantages of metal vs plastic housings

“Unreliable plastic thermostat housings for the 2014 1.4 lt, is there any sort of thermostat thats available to buy anywhere that has a stronger housing, maybe one out of metal?”➕

“Running slightly cooler is not a bad thing. Even though there is a marginal difference, overheating caused by a cracked housing (either of them) is far more damaging.”➕

General discussion on hose clamps

“Idk if it helps when I replaced my thermostat housing I hade buy a new hose clamp”➕