The weather is pretty nice right now here in the southwest. The rains have passed and it’s in the mid 70’s while the rest of the country is knee-deep in snow and freezing temps. My son Kai is helping me in the shop today. We didn’t do much – just a bit tin installation / alignment, exhaust header stuff and sealing air flow around the oil cooler.
The gaskets are the round-port cardboard-like material – so you can see they’d restrict the air flow of the heads.
I cut a notch where needed around the bottom left edge perimeter with a sharp utility knife. Then install and hold flat to the ports while using a scribe to etch the actual port shape underneath the gasket. Knife that new ovalled shape and voila! Perfect air flow without restriction. This image shows the cutting already done.
Next up was installing the headers with new gaskets. I’m trying out these graphite-impregnated 1.5″ exhaust gaskets. They’re pretty neat. Slippery to feel. ⅛” thick to start and say they’ll compress down to 1/16″ so they’ll conform to any imperfections. They certainly are easy to compress. I had the usual fiddly difficulties in contorting the headers and banging them with a mallet and block of wood to get them to align on the studs. I’m using the 1.5″ merged header with A-1 Sidewinder exhaust. Great sound.. Nice tuck-away.
In case you’re wondering about the checkered marks on the header – they’re from a previous cloth wrap I just removed. It was black carbon-colored fiberglass wrap. It looked cool at first then became less so when all the black wore off to natural yellow/white-ish. My initial thought was to protect the oil lines and rear painted tin and apron from excessive heat. I suppose, technically, it worked though not enough. I noticed some browning of the paint on the apron – even though it is a double-walled thing. Bummer. At least the paint is partially hidded behind the rear bumper. The fabric-covered header (as it swoops toward the merge point) touches the apron. Nothing I can do about that unless I get a totally different header setup. Gah! I guess I should consider re-wrapping this again lest the burning get way worse. Then there’re those precious oil lines, right?
Next up is fitting the doghouse tins so they actually seat. Because, of course, they don’t on my engine. I went shopping at Lowes in the door/window sealing aisle. This seemed easier than tracking down the seals only… and paying for shipping.. Most things I saw included the 2 tins as well (which I already have – and painted dove blue). In the image below I replaced this seal with one ¾” longer so it could fill that lower corner gap.