LT4 Billet Thermostat Housing - Granatelli FTW
 

For those of you wondering if you should upgrade the thermostat housing to a billet unit... DO IT NOW!!

I was doing some line rerouting around the engine bay and needed to remove the small house on the t-stat housing, but the house was baked in and when I pulled the plastic barb snapped off. Not a big deal to me, as I figured Id just tap the hole and install a bras barb so I picked up what I needed and proceeded to repair it... soon after I realized how brittle the housing really is, the damn thing pretty much kept crumbling with every attempt and lastly I just shoved a hollow tubing and siliconed it in as a temp repair.

I ordered a Granatelli housing with a 180* LS3 T-stat on a Sunday, called on Monday to ensure they shipped asap and they shipped that very afternoon (Kudos Granatelli for the awesome support). However, to my dismay UPS had issues and delivered 4 days after the original estimated date. Finally received the part, super nicely packaged and beautifully finished, the t-stat looks oe grade and expect no issues long term (time will tell).

Finally had a chance to do the swap which went super smooth specially considering I have an XDI fuel pump which uses one of the t-stat bolts for mounting and requires it to be rotated out of the way, so I switch my green belt to an RPM belt on shot.

See the attached images for ilustration.

Ill be logging the for engine temp next week and check for differences.
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Mine fell apart too

Nice upgrade!

Thanks, did you go billet as well?

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I found out the hard way why these exist when I broke a belt! A great upgrade to the plastic unit.

That was a fear of mine as well. Luckily I was home when it happened. Hope you werent to far from yours!

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Advanced Modern Performance is better.. it angles the small hose the same at the large hose..

That is a great looking engine bay my friend. I see your point about the angle.

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It was middle of no where and middle of the day with all my buddies at work. Lol. Got lucky and neighbor drove by. I left the car in a cotton field and went into town and picked up a new one. Made for an eventful afternoon. 😂😂

That is insane man. You should make a nice sticky note with your story as a cautionary tail. So glad it worked out at the end.

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How many miles are you guys seeing the thermostat housing failing?

Its not a millage thing, more like something that will likely break during service or due to a belt failure.

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Yep.

They need to fire the asshole who designed this part. Just plain idiocy.

So to use this metal thermostat housing, you need to use an LS thermostat?

Probably going to order this and just want to make sure I get everything that I need for it.