Problem with oil leak.........any suggestions?

nybugguy

I just got the buggy on the road 2 days ago and put on about 60 miles.It seems to be a strong running motor but after about 40 miles I developed an oil leak. Of coarse you know that when you are driving it is splashing and spraying all over and it is very hard to pin point the problem.I got it home and spent about 2 hrs. cleaning everything that got covered and then started it up to try and find the problem. After checking the torque on the case and everything else I could find, the only leak I could find was at a high constant idle.While holding the throttle at a high idle I noticed that I had oil coming out of the dipstick tube.A friend of mine seems to think that I may have a vent somewhere on the case plugged or my oil fill cap isn't ventilated. Does this sound like it could be the problem? and if so....where would I look for a case vent. It seems logical but I am not aware of a vent or vents.If pressue builds in the case I suppose the only way out would be somewhere like a dipstick tube.Anybody have any other ideas they want to throw my way I would greatly appreciate it.....I really don't feel like spending another 2 hours cleaning up oil until I can find the problem.Never lost enough oil to be an issue either.........thank God!

sturgeongeneral · Posted: Sat Oct 10, 2009 4:39 pm Post subject:

The case vent is through the oil fill and blowby tube assy. It may be a ring issue causing excess crankcase pressure.
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nybugguy · Posted: Sat Oct 10, 2009 4:49 pm Post subject:

Thanks for the reply but what exactly do you mean about the tube assembly.....do you mean the tube the dipstick is in? And also how does a ring problem cause excess pressure and how can I detect if that is the problem.Sorry....never had an issue like this before,all new to me.

BL3Manx · Posted: Sat Oct 10, 2009 4:59 pm Post subject:

dan macmillan · Posted: Sat Oct 10, 2009 5:05 pm Post subject:

nybugguy · Posted: Sat Oct 10, 2009 5:22 pm Post subject:

Ok .......now I'm getting concerned. I just had the motor rebuilt, complete with new pistons and rings.....so where do I go from here? And where does the hose go to that is attached to the filler tube? Maybe I ran it someplace it shouldn't go.Thanks for your help...I really appreciate it. I'm sure we can figure this out eventually!

lostinbaja · Posted: Sat Oct 10, 2009 5:30 pm Post subject:

The tube next to the oil cap is supposed to be connected to the air cleaner housing. The bottom of the tube is the road draft tube and just vents to atmosphere.
What size engine are you working with?
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nybugguy · Posted: Sat Oct 10, 2009 6:08 pm Post subject:

AHHHHH HA!!! I think we just solved that problem.I didn't know where to run the hose from the vent tube and a friend of mine told me to run it into the nipple on top of the doghouse.That would cause a blast of air from the fan down the tube to the crank and obviously out the dip stick.
I am running a 6 in. chrome air filter....forgot about the original equipment ran from the oil filled air cleaner to the vent tube.So can I plug off the nipple off the top of the fan shroud and then put some sort of small air filter off the end of the crankcase vent tube? I feel like the dipstick now.....I guess that is what happens when you don't ask the PROS!

nybugguy · Posted: Sat Oct 10, 2009 6:14 pm Post subject:

Forgot to tell you that I am running a stock rebuilt 1600cc motor with new solex carb.

sturgeongeneral · Posted: Sat Oct 10, 2009 6:17 pm Post subject:

You can plug the nipple on the doghouse to help not losing precious cooling air. They do sell filters for the end of the filler tube vent. I do believe you hit the nail on the head. You were pressurizing the crancase by blowing air down into it.
_________________
Street legal fiberglass rocket ship
2005 Lotus Elise supercharged
1974 Chevy Corvette
My fiberglass car collection!

In honor of bowtie56jw:Another victim of the nasty "C" Praying for ya Jeff!

My exwife said if I towed home one more bug she would leave me. You know, every once in a while I miss her

nybugguy · Posted: Sat Oct 10, 2009 6:18 pm Post subject:

Forgot to tell you that I am running a stock rebuilt 1600cc motor with new solex carb.

LeeVW · Samba Member Joined: June 14, 2006 Posts: 1016

I agree with sturgeongeneral. The stock routing for the crankcase vent is to the intake, which is a LOW pressure area relative to the crankcase, whereas the fan shroud is a HIGH pressure area. Routing it back to the intake is the best solution, but a filter on the end of the line would work fine too.

What about the outlets for the heater boxes? Did you plug those? Maybe post a couple pictures of the engine so we can see what else might need attention... Twisted Evil

Lee

nybugguy · Posted: Mon Oct 12, 2009 7:01 am Post subject:

yes...heater box outlets are capped as well and now everything is fine....thanks to all for thier help!

nybugguy · Posted: Mon Oct 12, 2009 7:10 am Post subject: carb adjustment question..

I am running a new 34pct empi carb. Seems to be working o.k. except for low rpm take offs. It spits and sputters a couple times when accelerating,but the rest of the time seems to run smooth.At times it feels like it is holding back a little and it could use a little more "something "to get more power.Could this little more be air adjustment or gas.And would it be more or less...and on which one? I read my haines manual and tried a basic setting to start with by turning both adjustment screws all the way in and then backed them each out 2 1/2 turns.....now I need some advice on how to "fine tune it". Any IDEAS???

manxdavid · Posted: Mon Oct 12, 2009 8:22 am Post subject:

Are you running the stock vacuum advance distributor or an 009 mechanical advance replacement. If the latter that could be your problem.

ev88f · Posted: Mon Oct 12, 2009 1:44 pm Post subject:

do you have your heatrisers hooked up to the exhaust?
i just changed my exhaust to one with heat risers and it made a world of difference. even though i was freezin my ass off it wouldnt stumble in cold weather


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