VETDRMS
15+ Year Contributor
- 340
- 21
- Jun 1, 2006
-
Vancouver,
Washington
The head is still off being repaired so I have been doing what little projects I can and collecting parts for the reassembly.
The O2 housing had a pretty large leak right at the wastegate opening so that would explain the slower-than-expected spool. I had it re-surfaced and it was pretty out of whack. I don't see why MAP won't use a 1/2" flange.
I had originally used cap screws on the O2 housing and wastegate, which looks nice but is hell to tighten/loosen when everything is assembled. This time I will be using ARP 12-point stainless fasteners which should make it much easier to get to with the smaller head.
For anyone who is looking the sizes and part numbers for the ARP fasteners are:
M10x1.25x30 – 773-1003 - SummitRacing 773-1003
M8x1.25x20 – 771-1001 - Summit Racing 771-1001
This should make it more serviceable in the future. Hopefully it doesn't leak this time.
I also got a can of Hylomar which I will be using on the headgasket and exhaust gaskets this time. The can says "especially for copper or multilayer head gaskets," and I have heard really good things about this sealant from various engine builders. The Hylomar part number is HUBRA-1. I got it from Atkins Rotary off eBay: Hylomar Spray eBay
Also, if anyone is looking I found some nickel-based high temperature anti-seize that is specifically for stainless steel and is rated to 2400F. The 8oz can with brush is part number 77124 from Loctite. Loctite High-Temp Nickel Anti-Seize
The O2 housing had a pretty large leak right at the wastegate opening so that would explain the slower-than-expected spool. I had it re-surfaced and it was pretty out of whack. I don't see why MAP won't use a 1/2" flange.
I had originally used cap screws on the O2 housing and wastegate, which looks nice but is hell to tighten/loosen when everything is assembled. This time I will be using ARP 12-point stainless fasteners which should make it much easier to get to with the smaller head.
For anyone who is looking the sizes and part numbers for the ARP fasteners are:
M10x1.25x30 – 773-1003 - SummitRacing 773-1003
M8x1.25x20 – 771-1001 - Summit Racing 771-1001
This should make it more serviceable in the future. Hopefully it doesn't leak this time.
I also got a can of Hylomar which I will be using on the headgasket and exhaust gaskets this time. The can says "especially for copper or multilayer head gaskets," and I have heard really good things about this sealant from various engine builders. The Hylomar part number is HUBRA-1. I got it from Atkins Rotary off eBay: Hylomar Spray eBay
Also, if anyone is looking I found some nickel-based high temperature anti-seize that is specifically for stainless steel and is rated to 2400F. The 8oz can with brush is part number 77124 from Loctite. Loctite High-Temp Nickel Anti-Seize
