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| Morgan Carbtune | Rating: 
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| Posted: 06-07-2011 05:13 pm |
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21st Post |
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jarnol123 Member
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Thanks...I'll check the springs tonight...i'm pretty sure that i don't have the clamp nut (green arrow)..but i'll check.. Will report back later...thank again
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| Posted: 06-09-2011 04:39 am |
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22nd Post |
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jarnol123 Member
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So I got the timing set at 10 BTDC at idle...however, the exhaust is smoking more than usual and i'm getting some spitting around the carbs.
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| Posted: 06-09-2011 05:25 am |
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23rd Post |
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subwoofer Member
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A few questions: - How is the max advance? - Have you reset the idle mix screws after fiddling with them earlier? - What are your idle revs? It is not uncommon for cammy engines to spit back a bit at idle, so that in itself is not much of a worry. The smoking could be from being overly rich, from oil spills on the exhaust manifold, coolant due to a failed head gasket, worn valve guides, worn cylinder bores... "Smoke" is not a lot of info to go on, colour, smell and amount of smoke would say a lot more. Does it smoke after fully warmed up? -- Joachim
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| Posted: 06-09-2011 05:41 am |
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24th Post |
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jarnol123 Member
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Didn't go too far on max advance cause of smoke but it went back 5 or so degrees when I revved it a bit. I need to reset the idle mixture. Idle revs are about 1100 As for the smoke it's blueish in colour and quite a bit of smoke (smells a little petrolish in nature)...I was not getting any smoke before when I had the timing way in advance though. I didn't notice any smoke around the engine...just mostly from the exhaust.
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| Posted: 06-09-2011 10:01 pm |
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25th Post |
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subwoofer Member
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Your idle is a little high, but nothing to worry about. IIRC factory spec is 900-950. Reset the idle mix to something sensible. Blue smoke is usually a sign that you are burning oil. Check the oil in the sump, does it smell of petrol? Does the crankcase vent go back to the intake? Try disconnecting it and see if a lot of oil fumes are coming from the sump. I assume you have figured out how to properly use the timing gun? When you say "it went back 5 degrees" you mean that it advanced to 15 or so degrees, right? -- Joachim
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| Posted: 06-15-2011 06:18 pm |
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26th Post |
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subwoofer Member
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Have you looked more at the engine? Are you getting closer to a drivable car? -- Joachim
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| Posted: 06-15-2011 07:34 pm |
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27th Post |
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jarnol123 Member
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Ok so i got the timing set, the carbs are balanced. I checked the oil and there is no smell of petrol. Still getting smoke from the exhaust but not too bad. I did take a small video so you can see the engine running. I'll try to attach it here. My plan is to change the oil and filter and put in 20w50. There is still some spitting from the engine though
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| Posted: 11-20-2013 01:47 am |
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28th Post |
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Bogie07 Member
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I'm getting pretty bad smoking once warmed up. It's quite a bit and usually around idle RPM's, although it also does higher up also. It's blueish and smells like oil. Cylinder #3 has low compression (100ish), what would be causing these things?
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| Posted: 11-20-2013 09:17 am |
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29th Post |
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subwoofer Member
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Low compression and smoke would suggest blow-by, i.e. that the piston rings and/or the liners are worn out. See if you have oil mist coming out of the crankcase vent. You could also be unlucky so all the ring gaps lined up, I have heard about this problem on VW flat-fours. Another reason for smoke just as it gets warm is that the exhaust side valve cover is leaking oil down on the headers. The cooling fan and the wind speed will carry the smoke under the car and towards the rear. -- Joachim
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| Posted: 11-20-2013 03:45 pm |
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30th Post |
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Bogie07 Member
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Thanks for the reply, but I found it was something a little more odd last night. The master cylinder was leaking brake fluid and it was being sucked through the vacuum hose into the manifold. Under high vacuum it would smoke more which makes sense. Unplugged the vacuum hose and sealed it off and no more smoke.
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| Posted: 11-20-2013 03:51 pm |
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31st Post |
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Jensen Healey Super Moderator 
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I agree with Joachim. It's likely oil from the exhaust cam cover dripping on the headers. It's easy to see with a good flashlight. Your low compression in #3 is probably worn or burned exhaust valves. Check the blow-by. lots of pressure inside the block means worn piston rings. How many miles on this engine? Kurt
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| Posted: 11-20-2013 06:38 pm |
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32nd Post |
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Bogie07 Member
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About 55k,original engine. No smoke though after taking off vacuum hose. Really odd.
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| Posted: 11-20-2013 06:58 pm |
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33rd Post |
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Jensen Healey Super Moderator
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Which vacuum hose?
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| Posted: 11-20-2013 08:39 pm |
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34th Post |
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Bogie07 Member
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To the brake booster. I read on a BMW forum that white smoke can be produced when the master cylinder leaks into the booster and is sucked into the vacuum hose. It explains why it doesn't smoke till it's warm and being driven.
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