Removing stuck horns (edit: trumpets!) from Weber 40 DCOE

[NedK]

Hi

I've taken the carbs off my engine, and two horns/trumpets came out quite easily.

However, the horns on the other carb seem very stuck, meaning I can't remove the back plate (and a new one costs so much I'd rather sacrifice the horns than the plate).

It's really hard to get any purchase on the horns, to twist and/or pull. They are soaked in WD40, for what it's worth.

Can anyone suggest a way of holding and pulling them free, so I can get on with stripping the carbs, and saving the plate?

Cheers
Ned

[billwill]

"Horns" had me confused there; thinking of something like Deer Horns.

I think that the usual name is Trumpets

WD40 is not a particularly good releasing agent. See if you can get some Plus Gas.

Others have mentioned other mixtures incorporating diesel oil, but I don't recall the compositions.

[billwill]

Perhaps some sort of freezing solution sprayed into the trumpuet or blocks of ice pushed in the trumpet will shrink them enough to come out.

Presuming that you have undone the screws/bolts that hold the trumpet (and backplate) in place.

[rgh0]

A combination of gently heating the carb bodies with a hot air gun and chilling the trumpets / horns with freeze spray after they have been soaked in a suitable penetrating and release oil should work. I assume these are 40DCOE. If they are 45's then you need also release the compression screw on the side of the carb body that holds the internal components in place in place of the spring clip on the 40's

Many commercial available products I think the homemade recipe that Bill was referring to was a 50:50 mix of acetone and auto transmission fluid.

regards
Rohan

[NedK]

Thanks to all, as always.
Yes, they are 40's, and all that's holding them in is the grot inside. The other pair slide nicely between the carb body and the main venturi tube.
I will try your suggestions of fire and ice, and more penetrating fluid.
All the best
Ned

[Craven]

Hi Ned,
You can gain access from the front and should be able to tap out the pair of trumpet and auxiliary venturi together.
Ron.

[NedK]

Plus Gas did the job in the end. Thanks to all.
Ned

[alan.barker]

I suggest you don't clean them too much or they will be loose fit in carb bodies
Alan