RETed

Can you PLEASE tell us what plane this is on so I don't book flights on it?!??!?!

-Ted

Therotaryrocket85

I would be curious as to how well the jb weld acts with the coolant cuz i used to have a 98 mustang gt and the plastic intake manifold cracked at the coolant channel and as a temp fix i used jb weld. It worked for a while but the coolant eventually turned it green( the color of the coolant obviously) and then it started seaping through. From what i saw coolant over time chemically broke it down but i know nothing of jb weld. Good luck with it

homebrewer

No, it wasn't on a commercial plane.

Do a search and you'll know what type of aircraft uses two T55-L-12 engines.

The repair was not necessarily "legal" but the crack once it was stop drilled and JB welded lasted until the engine failed from another cause. I had no problem with the repair and flew the aircraft numerous times.

Wankel7

Well, I used JB weld in three spots on my car that is exposed to coolant. I will keep you posted on what happens to it.

I used it to block off the two sensor holes in the WP housing and the coolant outflow in the rear iron on the top by the passenger side.

James

Oh , went Haltech and TB mod.

James

Therotaryrocket85

Yours will probably be fine then. In my case it was under some pretty hard stress and the plastic manifold expanded and contracted when it got hot or cold. Also i was trying to get it to bond to plastic which im sure didnt help the situation. I would keep an eye on it though cuz i was baffled when i saw mine go from being a gray color like its supposed to be to being green like the coolant. It also went from being rock hard to where i could put my fingernail into it and dig into it leading me to believe the coolant broke it down but it was probably that along with the other factors that lead up to it. good luck with it

homebrewer

That's strange. I repaired a radiator in an old Nissan with JB weld last year and it still is going strong. I didn't use the quick setting JB weld and don't know if that had anything to do with it. I do know that the non-quick setting JB weld is stronger and resists higher temps.

Therotaryrocket85

ya know now that you mention it if i recall correctly i think i used the quick setting jb weld. Thats probably where my problem came from. I completely forgot about that!

RotaryEvolution

iTrader: (30)

i feel like someone should flame the OP for all the noobish-ness. then again maybe it was a necessary learning experience.

the engine still survives and is in my car to date with about 75k miles on it @~325whp and has been for some time.

ericgrau

iTrader: (1)

I had to read this about 4 times. And I scrolled back and forth to the name of the guy posting it too. JB weld? Really? Lol.

Ya the same is true for pretty much all glues and tapes. Not that I don't have a roll of duct tape in the back of my car. I've likewise found JB weld doesn't hold. Under the very best circumstances with a well cleaned & rough sanded surface, no heat and a large bonding surface they might last as long as a rubber or plastic piece. Maybe.

RotaryEvolution

iTrader: (30)

well, keep in mind this was before you saw those failures regularly or had discussions about the topic.

these failures are much more common now on the engines approaching 25 years in age and a chunk of additional years of neglect. even back then turbo parts weren't falling out of trees hence the n/a housing swap which also wasn't common at the time and treading new-ish territory. S4 turbo housings were commonly tore up even back then versus the n/a housings which were usually in decent shape still, most hanging around 100k miles on them.

looking back, the iron probably wasn't damaged in shipping either.. i was probably duped out of my money on a known junk iron and the bits tossed in the box with the iron to make it look like a shipping issue. i've since repaired irons with different methods, methods that actually work.

housings can also be repaired by drilling and tig welding but at the time it was easier to just toss them. i still to this day use both junk rotor housings as engine painting fixtures(from the engine in the original pic). one wound up pissing coolant through the spark plug hole, the other through the exhaust port, it was ugly(also strange that the original engine in the car ran ok for 2 weeks before stranding me at a convenience store with 2 coolant flooded chambers without a hint of burning coolant before that instance).

ericgrau

iTrader: (1)

Ya live and learn. I thought JB weld was amazing the first time I used it for some things. Then came the fails. It's still nice for temporary or low stress applications. The duct tape of adhesives.

rotormouse

Hi guys how about this one,my drag car is semi-peripheral ported and guess what its all done with slow setting jb weld.Thats right no tubes or inserts ,just filled that part of the housings with jb weld after grinding grooves so it would bond well and machined in the new oval ports 25mm high and 30mm wide. I dont want to be pre-mature and say it works great but i have ran the motor very hot ,no coolant just water but have not raced it or pushed any boost through it yet.I did strip the motor down over a low oil pressure problem and the jb weld was still perfect.I will be getting the car dynoed in the new year and hoping to push 20psi of boost through it,so watch this space and see what happens.
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