CUL8R Posted November 11, 2007 Share Posted November 11, 2007 So yah was fanging my 1973 Mercedes 230 (auto twin zenith carb) in the 50 lapper down here, was going well, really well infact, then about 10 laps in starts to lose power, dropped back to 1st, and lost power, then died completly on me. Wont fire up now, should still be heaps of gas left in it. Towed back to where Im sorta storing it, tried to start it, turns over (perhaps slower than usual, but hard to tell) Sprayed start ya bastard down , still nothing. Sounds like its pushing air out when its cranking, but not from the inlet or exhaust that I can see.... Yes its be a damn long day, Im sleep deprived, ran out of fuel this morning, then had all the studs in brothers 1 tonner break, and I had to fix his derby car, and then turn around with the mad rush and get mine done. Was smoking for awhile after I'd stopped, probably a good 10mins of wisps of smoke, unsure from where by the time I was allowed out of the car, it'd stopped the wisps of smoke.. Any ideas? Probably something blatantly obvious, but in my current state no alot of computing is going on. Any help would be greatly appreciated Cheers,Chris Quote Link to comment Share on other sites More sharing options...
Requiemk Posted November 11, 2007 Share Posted November 11, 2007 Are you getting fuel? are you getting spark? Quote Link to comment Share on other sites More sharing options...
CUL8R Posted November 11, 2007 Author Share Posted November 11, 2007 Should be getting both still havent had time to check, Dizzy is complete, has been knocked about, likewise the coil, sprayed start ya bastard shit down anyway and still didnt go, so I think its something else... its making puffing sounds Quote Link to comment Share on other sites More sharing options...
dirty_leppa Posted November 11, 2007 Share Posted November 11, 2007 maybe u have bent some valves and u cant get compression Quote Link to comment Share on other sites More sharing options...
filthy one Posted November 11, 2007 Share Posted November 11, 2007 i'd be checkin spark brother could of been losing power due to coil breaking down then droppin completely dead hence why it stopped Just a theory but I'd start there easy to check pull the lead our the dizzy & get someone who knows nothing about cars to hold it while you wind it over . If they jump 20 feet in the air its fine & not your problem but it'll be funny as fuk to watch Quote Link to comment Share on other sites More sharing options...
sholdowa Posted November 11, 2007 Share Posted November 11, 2007 I'd go along with the 'something's melted' theory. Let's hope it's the coil, not pistons (: Quote Link to comment Share on other sites More sharing options...
CUL8R Posted November 11, 2007 Author Share Posted November 11, 2007 maybe u have bent some valves and u cant get compression Surely that'd make a hell of a noise when turning over? Wouldnt it? Two weeks till next derby, pull to bits or bust/get new car/fucked off completly Cheers,Chris Quote Link to comment Share on other sites More sharing options...
Unclejake Posted November 11, 2007 Share Posted November 11, 2007 I'd go along with the 'something's melted' theory. Let's hope it's the coil, not pistons (: A man would be hard pressed to melt one of those engines They didn't lose the war for under engineering anything! Anyways - check for spark when you can and report back. If you have spark there is a fuel return valve at the front bottom of the front carb that can give issues and the other two culprits are the pressure modulation diaphram on the auto allowing ATF into the carbs or the brake booster/master cylinder going crook and allowing brake fluid into the ntake manifold. The Zeniths are a total bitch to set up right. True story. there is only one man on this planet that I will let touch them and he is 84 years old now. Quote Link to comment Share on other sites More sharing options...
EFI_LC Posted November 11, 2007 Share Posted November 11, 2007 Maybe the cam chain has jumped or the timing has jumped out it would explain lack of power and then stop and also an unusual sound when winding over... im no mechanic but what u describe is compression escaping? Broken keyway? Quote Link to comment Share on other sites More sharing options...
Dr Danger Posted November 12, 2007 Share Posted November 12, 2007 So you set them up yourself Unc? Quote Link to comment Share on other sites More sharing options...
QCADTA Posted November 12, 2007 Share Posted November 12, 2007 You havnt run ya bottom end have ya? Done this before, car ran but was had no pull and was slow to turn over, didnt even sound that bad when running. Hope not but just a thought. Quote Link to comment Share on other sites More sharing options...
sholdowa Posted November 12, 2007 Share Posted November 12, 2007 maybe u have bent some valves and u cant get compression Surely that'd make a hell of a noise when turning over? Wouldnt it? Unfortunately not. A slight bang and they just won't seal too well, and you hear it puffing a bit, and it spins over one cylinder faster than the rest when cranking... Mind you, something catastrophic has to happen to bend them in the first place, like the cam belt jumping, or snapping. I've only done that twice... unfortunately on an Integrale and a Maserati Quote Link to comment Share on other sites More sharing options...
CUL8R Posted November 12, 2007 Author Share Posted November 12, 2007 Cheers for the heads up guys, Will check back here asap with updates. Starter motor has more of a whine now, like a starter motor does when it doesnt engaged, cept its definitly turning the engine over. Possibly looking at getting Damaged 250 Diesel as another now also... Cheers,Chris Quote Link to comment Share on other sites More sharing options...
CUL8R Posted November 12, 2007 Author Share Posted November 12, 2007 As Above, should've mentioned, the 'puffing' I vaguely described is when Im cranking it over, I can hear Air escaping/getting pushed out , and I dont it think its from the Inlet or Exhaust manifolds... Hopefully check the bitch out Sometime this week, got till the 24th to get it going or get another car... Cheers,Chris Quote Link to comment Share on other sites More sharing options...
Unclejake Posted November 13, 2007 Share Posted November 13, 2007 Good luck Mang. The earlier cars never had fuel filters and the tanks are really bad for rusting up. If it wasn't getting fuel I would have expected the Engine Start to have made it fire though. If you do pull the motor out getting the throttle linkage off is a shit of a job. Rubber grease and a ball joint seperator fork is the best way I have found so far - but others probably have a better trick Quote Link to comment Share on other sites More sharing options...
mikuni Posted November 13, 2007 Share Posted November 13, 2007 Mean, that looks awesome! And those are the hottest non-crossflow manifolds I have seen in ages. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted November 13, 2007 Share Posted November 13, 2007 Mean, that looks awesome! And those are the hottest non-crossflow manifolds I have seen in ages. Ahh - the things the German's used to do to fit the steering box on the right hand side of the car for the folks that won the war.... just to make their life hell Quote Link to comment Share on other sites More sharing options...
CUL8R Posted November 13, 2007 Author Share Posted November 13, 2007 Looks like you've got the same carbs (abeit slightly cleaner), but I dont think my manifold is the same, could be, I know the throttle linkage is... Timing is by chain? does it have any sort of tensioner , either another sprocket or by plastic grooved block etc? Hmm will have to whip rocker cover off, and get to TDC and check cam.... You'll be able to tell me, is there any marks on the crank pully and cam for where TDC should be (top dead center) Will save me time when working on it... Cheers,Chris Quote Link to comment Share on other sites More sharing options...
Unclejake Posted November 13, 2007 Share Posted November 13, 2007 Looks like you've got the same carbs (abeit slightly cleaner), but I dont think my manifold is the same, could be, I know the throttle linkage is...Timing is by chain? does it have any sort of tensioner , either another sprocket or by plastic grooved block etc? Hmm will have to whip rocker cover off, and get to TDC and check cam.... You'll be able to tell me, is there any marks on the crank pully and cam for where TDC should be (top dead center) Will save me time when working on it... Cheers,Chris Timing is by chain. The tensioners are a strange hydraulic arrangement. See if it has spark and fuel before pulling anything apart Quote Link to comment Share on other sites More sharing options...
CUL8R Posted November 22, 2007 Author Share Posted November 22, 2007 @ Uncle Jake, can you tell me how the cam timing is set on the merc? Cheers,Chris Quote Link to comment Share on other sites More sharing options...
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