You want studs and k nuts or aerotight nuts for turbos tbh. Bolts are almost always going to come out with vibration
Find the correct grade, washera
I don't understand how a grade of bolt will help it coming loose, never heard that before, i'm ready to be proved wrong.
I clicked post way too early. I blame the time.
Anyway, cheap metal threads will stretch, whether they're studs or bolts.
Heat cycling and the level of heat will affect cheap metal over time, and also differing qualities of metal will expand and contract at different rates. Turbo casings will be obviously made out of decent metal to take the temperatures, which means that the bolts/studs need to be high spec to try and give similar expansion. This is a reason torque settings are given in other areas such as head bolts etc.
Decent metal such as T41 and duraheat 1055 (previous post was wrong its early) is designed to be used in high temperatures continuously. An example, on a turbine outer casing, we're not allowed to use anything less than the standards of T41 because the heat, and heat cycling would affect metals of a lesser quality
Yeah fair enough on that mate, cheap eBay bolts will expand more than the housing but surely you have at least 10.9's in there Dan?
Studs are 90% of the time a higher grade metal than your average bolt cost wise so that was my thinking plus it will be easier to fit a turbo and gasket if you have room for the studs.
Weld on or tap and lock nut a fitting in both require removing the sump to be done right so I would go with weld on personally. Make sure that the drain collector is right for your turbo's central block.
edit: depending on your boss you have on already you could get a 'x' over from an10 to yours.
Youll need to remove the sump for a weld on boss as well as I wouldn't want the dwarf to fall into the sump when drilling it.
I've wnt for a weld on boss to the block this time to make sure the drain entry will always be above the oil level. This is not always the ce with a sump return no matter how high it is on the sump.
Youll need to remove the sump for a weld on boss as well as I wouldn't want the dwarf to fall into the sump when drilling it.
Yeah if you try and weld it on when its on the car its quite low, so it would have to be a dwarf that did the welding.
Dont drill the sump, do it properly and take it back In to the block,
This!
That just drilled out and the fitting welded in there?
Drilled and tapped not welded is the way to go.
That just drilled out and the fitting welded in there?
Why?
Because welding a fitting into the block will be horrid as its cast iron, plus if its drilled and tapped then its replaceable easily in future.
Please bear in mind my post you quote was ONLY in the context of it going into the block, not the sump, the sump isnt strong enough to make do will drilling and tapping.
Sump is fine it's a non stress point.