Honda K Series Thermostat Housing

How much do you hate the plastic OEM housings found on almost all k series engines? Maybe you've had a cracked housing... or worse, a stripped M6 insert that kept you from being able to remove your thermostat cover! 

This Genuine Honda thermostat housing for the Acura RDX fits all first gen k series water pump housings, however it may change the thermostat cover bolt pattern, depending on what you started with. If you are currently using a K20A, K20A2, K20Z1 or any other engine code that shares the same part number as those... your cover will not work. You will need to buy a cover from one of the K24A or K20Z3 engines that point the direction you want.

If you own my billet cover or you are considering buying one, you must select the "All Others Mod" so that it works with the bolt spacing found on this housing.

You may also notice that this housing has a very tall metal tube coming out of it; that is your new water bypass connection. It is not only tall, it is 3mm larger! The plastic housing measures 17mm and this one measures 20mm, so you will need to buy a reducer joint or try and stretch the smaller hose over the larger nipple.

NOTE: I stock these in limited quantity. If the product goes on back order... it will delay your order for up to a week. The hardware kit includes three Genuine Honda M6 bolts and the matching gasket.