Previously on Project Retro Rally: I will be driving this car in the AvD-Histo-Monte. We are going to be turning this into a classic rally car. Just point and shoot? You can see how much work there is left to do! That is rough. Gearbox needs to come out… One gearbox removed! Concerning oil leak, it’s coming from the motor. So this will be changed, hopefully no more leak… Welcome back to Behind The Build, featuring Heinrich, our magnificent Mercedes-Benz 280 S that we’ll be transforming into a rally car over the next few weeks. And this week with work really progressing, we’re gonna be getting into the nitty-gritty build details that you won’t have seen on the Car Throttle channel. Speaking of, we took the gearbox out, had a fight with a bolt and removed the old radiator. And while we’ve been away, Swen and his team continued ice-blasting Heinrich’s belly. It’s time now for us to draw our attention to Heinrich’s engine, so I would now like to introduce to you a very special man, Karl-Heinz. Very nice to meet you. Hello! This is Karl-Heinz, he is a Mercedes-Benz mechanic and he’s gonna be showing me through the process. So the first thing that we need to do to Heinrich is have a look at the air filter. This means removing a breather pipe and two bolts, after which the air filter lid is lifted. It doesn’t look too bad! Doesn’t look bad at all… Yeah, it’s good. But we’re swapping it. Here’s the new, original one, which you can still get. Look at that, a thing of beauty! With the new filters snuggly installed, the air filter lid is replaced. So that’s the build, done! Well, not quite, because the next thing on our list is to check the spark plugs and test the engine’s compression. Here’s a nice little hack for you guys, when you’ve undone the spark plugs sufficiently, you get one of these rubber hoses on. Six spark plugs, out! So now stuff gets interesting because we are namely going to do a compression test on Heinrich’s heart. Go! – Go! Stop! – Stop! Full gas! – Full gas! – Go! Stop! – Stop! Go! Cylinder six… Stop! Alright, so I think Karl-Heinz is pretty impressed with Heinrich. Did I do well, too? You did very well! The compression picture, apparently, is very, very good, especially for the age of this car. You’re allowed a tolerance of about one bar and as you can see here, all six cylinders are pretty much on twelve here so that’s a really good reading, meaning that Heinrich is a very happy boy. Next step is to take the valve cover off, have a look at all the valve clearances – make sure everything’s good. Here we go, let’s have a look… Here we go, so now we’re gonna have a look at the valve clearances, using a feeler gauge on both the exhaust and intake side. .10 and .20 is what we’re looking for. With most of the valve clearances good and a few adjusted, I clean up the engine while Karl-Heinz fits a new valve cover gasket, before everything’s installed again. Next up, we turn our attention to restoring the distributor. And the cool thing is, you can get everything from Mercedes-Benz dealerships, including for cars like Heinrich. Everything for a classic Mercedes-Benz, you can still buy, which is pretty cool, which is where we got these parts from. The plan now is to check that the distributor cap is all working happily as it should, so I am going to start the car. So I’ve got to make a few tiny adjustments… I look good in here, right? I think this suits me… I think when I get back to the UK I’m gonna have to do a bit of research and maybe get a Heinrich of my very own… I can see myself cruising around London in one of these. The good thing is, as well, that you wouldn’t have to pay tax, or get an MOT. Start it, please! It’s good? 70. 42, that’d be good. Job done. Such a good noise! Right, so now it’s time to put the new spark plugs in. Let’s chuck ’em in! I say “chuck”, I mean “delicately place them”. Otherwise I’ll get shouted at… Right, so now I am being entrusted to put this hose back, using nothing but delicate touch. Not something I’m particularly known for, but it’s something that I think I’ve learnt now. So what I’ve gotta do is grab this and swing on it as hard as possible! No? Properly, like bwoaaa! No, very… nice and gentle… With things running smoothly, Heinrich decided to throw a spanner in the works, because what project car wouldn’t be complete without problems? And now it’s time to start Heinrich up and hope that everything works. We should be good! We should be good… It runs! – It runs. You need to give it a bit of gas. A bit of gas… Right, so it is now an hour later. The plan was to completely roll into the next scene, which would have been adjusting the timing. Unfortunately, Heinrich is refusing to start at the moment, so Karl-Heinz has been really busy scratching his head, pulling out the spark plugs, looking at the distributor cap again. And yeah, we don’t know what’s happening but all we know is that the engine hasn’t been getting any fuel. But Karl-Heinz asked me to start the car again because he’s put the spark plugs back in… And cleaned some stuff up. So yeah, I’m gonna try it and this is genuinely the first time, after many times of trying, that Heinrich will hopefully start? Well, this is… Well, I was gonna say this is actually a lot better than it was, but yeah, still having starting issues. Start it? – Yeah. Come on Heinrich! So yeah, Karl-Heinz is having a bad time. He’s just walked out the door… Probably just to shout at something, maybe a brick wall, I’m guessing… After a few minutes to get some parts, Karl-Heinz returned to tinker some more. Try now. Lumpy, but we’re running… So with Heinrich proving to be a massive pain in the… I’m gonna stop there. It’s up to Karl-Heinz to order a few new parts and hopefully get this old guy started in the next few days. Join us next time on Behind The Build for that, plus more wrenching, and don’t forget to subscribe to the Mercedes-Benz channel. Until then… See you next week. – See you next week! We’re going to go and drink some coffee now. OK! To subscribe, click here. And to watch another video, click here!