If I really don't want it to come off I just give it a dab with my MIG. It does mean grinding a little the next time you wan it off but there have been cases where it was the best answer.
If I really don't want it to come off I just give it a dab with my MIG. It does mean grinding a little the next time you wan it off but there have been cases where it was the best answer.
Just read this on Miata.net:
Post from Corky Bell about turbo fasteners.
Corky Bell said: The proliferation of track cars in the last year has clearly shown the method of attachment between turbo and manifold to be inadequate. At a time in my earlier life I was considered a fastener specialist, but this one is the toughest I've seen yet and I'm a bit stumped. Without launching into a useless lecture on fasteners that will unlikely solve anything, I do have a couple suggestions: 1. The stud needs to be torqued into the manifold to about 35/40 ft-lbs for our 10 mm studs. 2. The nut should be torqued to something less, say, 25/30 ft-lbs. 3. The Lawson style lock washers ought to help. That is probably the best we can do with the current casting. One problem with the casting is the thread depth on the upper studs needs to be greater. Picture "wobble" of the stud in the hole as part of the problem. The longer the engagement, the less the wobble. Other possibilities; the best fastener method is a through bolt with a nut on the far side. That is a bit tough with most any casting, but I will certaily review our piece to see what is possible. A fabricated header can easily use a flange with through bolts. The problem there may well be shifting the weak point to the manifold structure rather than a fastener. It may well be that removal of all fasteners answers the question. I've not done that before and I don't have the answer. We have commited to build several systems with V-Clamp attachments on all the joints. Literally; manifold to turbo, turbo to dnpipe, manifold to wastegate, wastegate to dnpipe or atmo. Hopefully, the crafting of the parts will not be the short coming, and the fastener method can get a real test. Regardless, we will give it our best shot.
I have to give the guy credit for admitting the current method is flawed while committing to at least attempting to fix it, permanently.
Looked at your pictures.
It looks like you have room to go washer-nut-washer-jam nut. The second washer can be a plain one, or it can be a ridged grip washer.
In any case, if you can't solve the fastener problem with fasteners you have a machine design problem. You should think about how else you can support the turbo.
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