Home 
Home Search search Menu menu Not logged in - Login | Register

 Moderated by: Greg Fletcher Page:  First Page Previous Page  1  2   
New Topic Reply Printer Friendly
Morgan Carbtune  Rating:  Rating
AuthorPost
 Posted: 06-07-2011 05:13 pm
  PM Quote Reply
21st Post
jarnol123
Member
 

Joined: 09-29-2009
Location: Scottsdale, Arizona USA
Posts: 95
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 06-09-2011 04:39 am
  PM Quote Reply
22nd Post
jarnol123
Member
 

Joined: 09-29-2009
Location: Scottsdale, Arizona USA
Posts: 95
Status: 
Offline
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.

Back To Top PM Quote Reply

 Posted: 06-09-2011 05:25 am
  PM Quote Reply
23rd Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 06-09-2011 05:41 am
  PM Quote Reply
24th Post
jarnol123
Member
 

Joined: 09-29-2009
Location: Scottsdale, Arizona USA
Posts: 95
Status: 
Offline
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.

Back To Top PM Quote Reply

 Posted: 06-09-2011 10:01 pm
  PM Quote Reply
25th Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 06-15-2011 06:18 pm
  PM Quote Reply
26th Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
Have you looked more at the engine? Are you getting closer to a drivable car?

--
Joachim

Back To Top PM Quote Reply

 Posted: 06-15-2011 07:34 pm
  PM Quote Reply
27th Post
jarnol123
Member
 

Joined: 09-29-2009
Location: Scottsdale, Arizona USA
Posts: 95
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 11-20-2013 01:47 am
  PM Quote Reply
28th Post
Bogie07
Member
 

Joined: 12-08-2010
Location:  
Posts: 29
Status: 
Offline
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?

Back To Top PM Quote Reply

 Posted: 11-20-2013 09:17 am
  PM Quote Reply
29th Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 11-20-2013 03:45 pm
  PM Quote Reply
30th Post
Bogie07
Member
 

Joined: 12-08-2010
Location:  
Posts: 29
Status: 
Offline
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.

Back To Top PM Quote Reply

 Posted: 11-20-2013 03:51 pm
  PM Quote Reply
31st Post
Jensen Healey
Super Moderator


Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 976
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: 11-20-2013 06:38 pm
  PM Quote Reply
32nd Post
Bogie07
Member
 

Joined: 12-08-2010
Location:  
Posts: 29
Status: 
Offline
About 55k,original engine. No smoke though after taking off vacuum hose. Really odd.

Back To Top PM Quote Reply

 Posted: 11-20-2013 06:58 pm
  PM Quote Reply
33rd Post
Jensen Healey
Super Moderator


Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 976
Status: 
Offline
Which vacuum hose?

Back To Top PM Quote Reply  

 Posted: 11-20-2013 08:39 pm
  PM Quote Reply
34th Post
Bogie07
Member
 

Joined: 12-08-2010
Location:  
Posts: 29
Status: 
Offline
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.

Back To Top PM Quote Reply

Current time is 09:21 am Page:  First Page Previous Page  1  2     
> Jensen Healey & Jensen GT Tech > Carburetors > Morgan Carbtune Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems