Garrett GT20 Project

[306Puggy]

You actually need the bolt holes to be a bit too big to allow for some expansion when it all gets hot. You'll see the same principle used where the manifold meets the head. I think a couple of mm extra might be a bit much though.

I know I was playing along to it.

What size bolts are you going to be using? M8s? If so, id go no bigger than 10mm holes. yes you need to leave expansion space but not that much! Also, get your self down B&Q. They have a Makita drill bit and bit set half price at £20. Just picked my self one up on the company card and the drill bits are bloody good quality.

I am planning to use whichever size bolts are normally used to bolt the turbo to the manifold to bolt the adapter plate to the manifold. Infact I might be able to get them from peugeot come to think about it.

Where are you going to get the oil line made up?

Heh, that's gonna be the easy bit!



Anyway,
This is how I marked out the holes for the manifold on the adapter plate:

I measured 10cm into the adapter plate on both sides then joined the marks with a line to put the manifold onto the adapter plate. Then holding the manifold still with one hand I poked a pen through the bolt holes to colour in the area through the bolt holes of the manifold. Which left me with this:



I have checked it by lining it up with the manifold again and it seems fairly accurate Now just gotta get some drill bits and start drilling. From a quick google it looks like I need to use a punch to put a dent in the metal roughly in the middle of where I want to drill and then I need to drill a pilot hole with a small drill bit and then I can drill the bigger hole with the right sized drill bit for the hole. Oh yeah and I need to put some oil on the drill bit as well.