I don't mind bribing people, but nobody is getting any of my beer.:beerchug:Is this on a Manta or something? Doesn't look like a GT thats for sure. Anyway, I know how I would fix it, but then I have access to all the necessary tools. As dallasmanta pointed out though, a channel lock and hammer minimum (vice grips are outstanding for bending and straightening tin) I would think by looking at it it's not structural (critically speaking) so straightening it as best you can through brute force, get it where it needs to be, soak it with etch primer and paint it and it will be fine. It is underneath and out of sight right?
But if your intention is restoration and your looking for showroom quality, and you dont know how nor have the tools to do it yourself, then your gonna need to go the extra mile and spend $$$ to have someone do it for you OR spend gobs more $$$ getting the tools you'll need and pay someone to show you or find someone you know who can show you how and bribe them with beer and have them teach you how to fix it. :yup:
Just looking at it I would guess I could make that fix in an afternoon, so long as I leave the beer drinking for afterwards
Cautioned my machinist of the rarity and expense of the cyl head casting we are working with. The question now becomes whether or not any of y'all ever experienced any problems breaching the water jacket while cutting for the hardened exhaust seats?? I've supplied PEP PC1625-1 seats which are 0.218" depth by inch and 5/8.1.5S head. Small chamber, and smaller valves than a 1.9.
valuable info, as always. many thanks. not one person I have tried to hire seems to know anything about 45-50 yr old Opels.Shallow depth is good...I've had issues on exhaust seats that were 3/8" deep and over 1.6" OD.
Personally I go with the same OD as the valve itself....so 1.5" seat with 1.5" valve.....certainly no reason to go larger on a 1.5 head. The actual seat-to-valve contact area occurs inside this diameter after all.
Been awhile since there was any progress on my part. Lots of machine work going on though. Got the 1.50" hardened exhaust seats pressed in and bowl throats sized for Pontiac intakes, and 1/2 x 11/32 bronze guides for my 1.5L head. It's up on the porting bench right now waiting for a set of new cutters. I will take some pics.How’s the project coming?
SSD guy now. I will delete post #21 from this thread.Nearly completed acquiring the major components for my engine build over the weekend. Pace Setter side draft intake and a core DCOE 40 should do nicely. THX to Young Olds. Fascinated with the carb, so I will rebuild it myself. Getting harder to find a good carb tech anyway. Any members here with Weber experience, feel free to chime in. Vintage unit made in Italy off of an Alpha Romero, so I'm guessing that the jetting would correspond to a Manta of the same approximate size and weight???
I uncovered this inside the #4 exhaust port. What do you make of it?Yup, cast iron sucks to port. Time is obviously part of the price, the other part is knowing where to grind...I've seen many an Opel head ruined by improper porting! Yours doesn't look too bad at all.
I do however recommend more chamber unshrouding. The 1.5 heads have a tight chamber shape of course, but with big valves it gets very critical. So much so, that smaller 1.72" Chevy valves will outflow the 1.84" valves unless you unshroud the chambers. They simply stop flowing after .425" lift, and are slow to build any flow at mid lift even.
Otherwise...it's looking good!