1974 A Series Opel Manta Blog

The Opel Project blog has been setup to record the rebuild of my 1974 A Series Opel Manta.
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1974 A Series Opel Manta Blog
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1974 A Series Opel MantaFeatured

My 1974 A Series Opel Manta. Its been a long project and it still has a way to go before it looks like it use to back in the day. Now running a 2.0l+ CIH engine on full Webber Alpha engine management. Everything is custom made or adapted, from the full 2.5″ stainless steel exhaust, Wilwood racing calipers, Cosworth rear calipers, Hydraulic clutch, Chevey S10 clutch kit and lots more.. Read on for full details of the rebuild and hopefull one day pictures of her out on the road!

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CIH Engine

Time to get the engine back together!

So the crank is back after being ground by .25mm. New bearings and piston have arrived + plus a few other bits 🙂 Now time to test out the new piston ring compressor sleeve! Im going to try the old damaged piston first to see how it works, it looked nice and easy on youTube!

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FOOT DOWN, LETS GO!

Now the winter has finally passed and the nights are longer is full speed and back on the project again 🙂 While i wait for the crank to come back i have a few other things to keep me busy! Today i had a full day on the Opel and as the weather was nice and dry i managed to get quite a lot done. When i removed the engine and box to give that the check over i noticed that the torque tube doughnut looked like it had a crack, and on further investigation noticed it was totally shot! so…

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Spring Time = Opel Time

So now the bad weather is out of the way and its getting warmer its time to get moving on the car again. I have a new plan of attack to try and get her finished this year! The crank is at the engine shop and needs a slight grind which i think was down to the problems starting her up and getting the oil pumping as a few of the bearing did have wear that looked like they had been short of oil. So hopefully in a couple of weeks, the crank will be back and i can get…

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Clutch

Hydraulic clutch

So lots to do and this weekend its time to get started again. So along with a clean up of bits im looking to get the hydraulic clutch started. I have it setup as a little mock up and need to secure a few bits and get testing.

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Engine out

Ok, it’s been a while since i posted and also since i did much to the old A series! Life kind of gets in the way far too often!! So as i decided to fit the S10 clutch and new flywheel i decided it was time to fix a couple of bits i was not happy about and as i like to do things big style! it was engine and box out. So i now have the box and engine completely out, the front suspension and part of the exhaust. So things to fix: Manifold – drill out holes as they…

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Wilwood 4 pot calipers fitted to Opel Manta A Series
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Finishing the brakes

So i now have all the parts needed to finish off the front brakes. Got the last couple of goodridge fittings needed to connect to the Wilwood callipers and got a couple of spacers to space the calliper out the 3mm to get it centrally aligned with the disc. This was a better option as the other one was to have 3mm machined off of the custom adaptors. So a quick test fit tonight and then all i need to do is get some thread lock and cut the brake hose to length and fit it all up. A little job for…

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