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Double Bass Engelhardt EC-1 Cracked seams

Hi-

I am a hobbyist electric bass guitar player and I wanted to try some bluegrass/old time upright bass so I found a used inexpensive Engelhardt EC-1 at a Music Go Round store.

The bridge was on backwards and the soundpost was above the G foot of the bridge. They repositioned the bridge, and when I got it home, I loosened up the strings and I used a coathanger to hook around the post and very carefully pulled it into a better position 3/4" below that G leg where I read on this site is a better "default" position for it.

While doing this, discovered 2 cracks in the seams. Both on the E side of the case in the "hollow" curved "waist" part between the top and bottom (sorry I don't know the name of that area!). I didn't hear a pop or anything as I adjusted the post and carefully retensioned the strings, although I supposed it's possible that I caused the splits. But I think it's more likely that I simply failed to see the open seams due to "1st bass fever" :)

So my question is, should I take what I have learned about hide glue and clamping from this site and give it a try? There do not seem to be any stress forces "holding" the seams open...my very amateur opinion is that a previous owner smacked or dropped the bass on its side and it "popped" the seam.

Any opinions welcome, photos attached. In the first one I have marked the edges of the separation with the white labels. The length is about 4". The second photo shows how you can see a slit of daylight from inside the bass. This seam is the one on the bottom. The one on the top (directly above it) is smaller. The bass sounds fine for what it is to my ignorant ear.

Thank you!
 

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If you feel confident to glue and clamp the seams and feel that you have read enough and understand the procedure, I say go for it.

I have successfully glued a couple open seams on my EC1, using the usual hide glue and clamp method, just either use multiple clamps and/or use pieces of wood to spread the clamping force.

If you are a little leary about trying this yourself, take it to your luthier, have him do the repair, and ask him if you can see how it's done.

You may want a luthier to check out the new and unfamiliar bass anyway, get his opinion on anything else that might need to be done.

Enjoy your new bass!
 
I just noticed one day that the seam along my g-side lower bout had come open a little, and a tiny opening on the e side lower bout. My bass was never bumped or anything.

Hide glue is not the strongest glue on earth and it's used for a reason. It is not flexible, so it doesn't dampen vibration (a good thing) , and it will let go before the wood does as a kind of fail-safe. The wood in a bass (even ply) can expand and contract with changes in humidity and temp, and the hide glue can weaken over time due to this expansion / contraction. This is my psuedo-scientific answer anyway.

Of course receiving a good bump can hasten the process, but sometimes seams just weaken over time and need some fresh glue.

Ply basses still move a bit due to temp and humidity changes, but they are made not to crack so easily because of it.

Good enough?