Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Antique Engine Community > Small Air Cooled Gasoline Engines > Wisconsin Engines
Forgot Password? Join Us!


Wisconsin Engines Single cylinder up to V4 engines.

Wisconsin Engines

VG4D smoking from crank case

this thread has 1 replies and has been viewed 2033 times

Thread Tools Display Modes
Old 04-22-2012, 07:38:04 PM
back2midnight back2midnight is offline
Join Date: Apr 2012
Location: Kirkland, Washington
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Default VG4D smoking from crank case

Hello, After my 40 horse vg4d gets warm as I shut it down a ton of smoke comes from the oil fill tube. No noise but it is running a bit rough, several hundred hours sense last rebuild. Any Ideas?

Reply With Quote
Sponsored Links
Old 04-22-2012, 08:38:40 PM
Andrew Mackey Andrew Mackey is offline
Join Date: Nov 2004
Location: Rockaway, New Jersey USA
Posts: 13,947
Thanks: 1,974
Thanked 6,538 Times in 4,215 Posts
Exclamation Re: VG4D smoking from crank case

I do not knao who did your rebuild, so I will ask as if you did it your self.

When you did the rebuild, were the rings matched to the cylinders? If you used 3 piece oil control rings, did they install properly? Pull the heads and look carefully at the cylinders - any grooves, shiny spots, indications of galling? Wear on one side of the cylinders?

I have seen Wisconson V-4s with mis-installed parts, that will run, but not well. The piston has to match the cylinder, # and arrow must point to the center of the V. The con rods have to match the location (there are left and rights), if they are installed to the piston wrong, or if they are out of order, they will cause the rod to be off center on the cylinder bore, and will bind the piston to the cylinder wall. The rings have to match bores' diameter, and the oil ring must slide in with out rolling over when it hits the cylinder wall. Personally, I do not like 3 piece rings, I would rather have toe old 1 piece style. No chance of a screw up with those!, and end gaps need to be correct.

Smoke from the block usually means either the engine is getting too hot (binding parts as I have mentioned above), A mechanical defect - too wide a ring gap, mis-sized pistons and rings to piston bore, wear in cylinder walls, physical breakage, or simply that the new rings are not fully worn in yet. Has the engine been run fully loaded?

Also, what oil are you using? Use what is recommended, and use a Diesel rated oil. Have you changed it after the rebuild? Should be changed at 10 hours, and every 25 after that, along with the filter, if it has one. Make sure the oil has no gas in it, if it does, possibility of a bad fuel pump or bad float in carb. Is the oil black, or is it nice and clean? If black, posibility of a lot of blow by - again check the assembly for wear and mis-installation problems. With a fresh and good rebuild, you should not be seeing any smoke!
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
1940 Case L front crank seal lightweight Antique Farm Tractors 0 07-30-2011 09:19:27 PM
Looking for a Lister size N crank case keeble Smokstak Down Under 2 10-11-2010 09:06:20 AM
Crank case oil ronny p 148 Onan Generators 3 01-28-2010 10:04:05 PM
4KW BF Crank Case Breather hose enzo86 Onan Generators 9 04-10-2009 10:28:37 PM
Removing Gas Tank Top from Crank Case? Maytag 92 enginesilo Maytag Engine Collectibles 3 09-01-2008 12:29:30 AM

Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 01:38:18 AM.

Smokstak and Enginads site search!

All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2019 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277