timk

Hi,

I keep reading about throttle plate screws coming loose. What type of epoxy are people using to secure the screw?

Is it as simple as putting a dab over the head of the screw?

Sorry if this seems like an obvious question, but it isn't something I want to get wrong!!

Cheers

fooger03

iTrader: (2)

You *keep* hearing about it? How many times have you heard about it? I don't think I've heard about it for at least 2-3 years.

Just apply loctite red to the threads and be done with it. - Or don't remove the screws in the first place?

18psi

iTrader: (76)

see cordus' buid thread.
this is a real thing. not just hearsay

timk

Well I make assumptions, but it is playing on my mind. The guy on here with the chopped up compressor wheel, and another post today on the Adaptronic forum showing an MX-5 with ingestion damage.

Are you saying it's only a problem if the screw has been removed before?

Thanks

Savington

iTrader: (31)

Why? So the epoxy can go through the engine too when the throttle shaft breaks and sticks the throttle wide open?

Shameless plug for actual solution to actual problem

leboeuf

iTrader: (1)

I'm not sure if I love this solution, but my throttle plate screws were staked... It looks like someone set the butterfly on a die of some kind and staked a crosshatch in the backside of the protruding screw.
At least I know they're not going to fall out... or be easily removed

asmasm

iTrader: (1)

If you do epoxy it, make sure you prepare the surfaces correctly. At the bare minimum give everything a good wipe down with acetone or some other solvent that will flash off quickly.

Hysol e120hp is a good all purpose structural epoxy but you need to buy an applicator gun and mixing nozzles to use it.

rleete

iTrader: (21)

Why the hell would you use epoxy at all? As stated before, Loctite red is what is called for here. High strength threadlocker. Epoxy is a ****-poor substitute.

Savington

iTrader: (31)

I'd like one of you to explain how loctite does anything when the problem is this:

williams805

iTrader: (2)

I'd like to know how the throttle screw got into the compressor wheel?

Mobius

iTrader: (2)

As Andrew is pointing out the epoxy doesn't keep the shaft from breaking. The skunk2 TB is the only true fix for BP's that see extended high rpm usage.

williams805

iTrader: (2)

Schuyler

iTrader: (1)

Henry (Team DNR) JUST had his built F-Prod motor eat a screw from a BROKEN throttle shaft in Savannah. The screws backing out are not nearly as threatening of a problem as the shaft breaking, in my opinion.

ftjandra

iTrader: (6)

From what I remember reading, all the epoxy really does is change the natural resonant frequency to move it away from whatever rpm/vibration is causing the shaft to break.

I have not done any searching, but has there actually been a case of a screw coming loose, but the shaft staying intact?

--Ferdi

codrus

In my case, the shaft was fine, it's the SCREW that broke. It didn't back out, the head of the screw broke off. Look at the hole -- you can still see the other half of the screw in there.



That screw chewed up the pistons, the head, and trashed the turbine.



--Ian

timk

Damn that sucks Ian. Are you now running the Skunk2 item?

If so does the increased opening make the throttle really sensitive?

Out of interest I used to have a Jap import track car and it had a rubber damper fitted to the throttle body (OE), I wonder if this is relevant as the car had a slightly higher rev limit?

Mobius

iTrader: (2)

My skunk2 tb didn't change my throttle response that I could tell.

Leafy

iTrader: (1)

All the junk2 throttle body did for me was make the throttle touchier. I'm 100% only running one to prevent small bits from destroying $6500 worth of bits and things.

codrus

I have a Skunk2 now, yes. I didn't notice any throttle touchiness when switching, though.

--Ian

Dunning Kruger Affect

Braineack: please make a "Race Prep" forum (note the quotes) and banish all autotossers there.