Thread: Exhaust manifold bolt alternative

Pull one out and take a look at it..? I'm not familiar with them but have no doubt that you'd likely be able to match up the thread type locally - just depends if it has something funky going on with the head. Generally the exhaust manifold bolts on engines are pretty straight forward and easy to replace.

Is it just surface rust? If so, threads and that might be fine and you can just clean them up.

EDIT: Microcat lists ERR6734 as the bolts.
http://
ERR6734.jpg
Looks like they could easily be replaced with alternative flanged bolts.

ERR6318 is the spacer for them.

Forget about the appearence, you'd be rusty too of you were a steel bolt through a cast iron header into an aluminium head

make sure you buy good gaskets and put them on right way round!

theyre a standard bolt, any good nut and bolt or fastners shop will have them and in a desperate pinch even bunnings carries the right format. Avoid stainless, nickle or zinc plated ones and get plain black.


if you cant get a shouldered bihex just grab a single hex and use a washer.

add nickle antisieze when you put them in.

Thanks all, these were just the answers I was hoping for. Wasn't sure if they were special like head bolts.

They are so rusty that the heads have snapped off a few bolts and the previous owner has just put nuts on what's left and hid a handful of spacers and random bits in the battery holder. So cleaning off the rust isn't an option.

Will check out my local fastener store and look for hex heads. Thanks also for the tip on the copper anti seize. Will take care with gasket placement, I've seen that post about the power reduction.

Shell