Question about 1986 Yamaha RD 350

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Oil tank weld?

It seems I have an oil leak somewhere on my oil tank. It seems to be the mount weld on the inner side closest to the engine about halfway up and closest to the front wheel. Is this where everyone else has had the oil leak develop? Otherwise, I have no idea where it is coming from. Seems that the dealer overfilled the oil last time I took it in for a service. What would happen if they overfilled by, say 1/2-3/4 liter?

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I just recently had an oil cooler split at one of the seams, so make sure you check around both of those.

Posted on Nov 10, 2008


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Posted on Jan 02, 2017


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1 Answer

How do I change oil pan gasget

Jack up truck for safety sake put jack stands under frame . remove all engine oil remove all bolts holding oil pan on if their is not enough room to drop pan you may have to remove bolts holding motor mounts and jack up engine. if front end linkage is still in the way remove linkage. pull oil pan out. check gasket that was between block and oil pan if any stuck to block of engine remove with gasket scraper or wire brush or wire wheel on drill.make sure mating surface is clean put new gasket on new oil pan I like to use a high temp sealer on gasket both sides. Put pan with gasket back in place of old oil pan and tighten all bolts. jack engine down ,replace moter mount bolts replace any linkage you took apart. and dont forget to replace engine oil. make sure oil plug is in pan before pouring oil in . before starting engine check that no oil is leaking than start engine and check for any leaks again if all is good your done. if this was helpful please leave good feed back. A good temp fix on a rusted oil pan is JB weld make sure no oil is on pan clean with towel and rubbing alchol .you may have to drain oil first. if it is rusted badly you may have to use a wire brush on a drill to clean the area to patch. if patched properly it may last for years.

Oct 17, 2014 | 2000 GMC Sierra

1 Answer

Oil leak on deck of Lawn Mower

Because you mentioned the smoke and hard to start it could be that the engine is flooding or overfilled. Check for fuel in the crankcase. Be sure cranckcase is not overfilled. An engine with too much oil will force excess oil out somewhere. If the mower has been turned on its side lately it could have put oil in places that it should not be and its trying to burn off this oil. Be sure your air filter is not saturated with oil or fuel.
If all that checks out we will look for oil leaks.
As far as oil leaks go the three most likely places for your engine to leak are from the head gasket, dipstick tube seal, or the sump gasket.
Check for proper torque on the head bolts ( 125 inch pounds). Headbolts can come loose over time. After that check that the seal at the bottom of the dipstick tube is in good shape and a tight fit. This seal usually leaks when the engine is running because at rest the oil level is just below this seal. Lastly, if everything else checks out then the sump gasket is leaking. To replace the sump gasket drain oil from motor and remove air filter. remove blade and self propel belt. remove engine stop cable. remove the three motor mount bolts from under deck and remove motor. place on work bench upside down. some fuel may run out carb or tank cap. remove sump bolts from bottom of motor and remove sump. Do not remove governor gear or cam gear from cranckcase. At this time it will be obvious where the gasket has failed. Remove old gasket. It may need to be scraped off. Take care to keep material from going into crankcase and clean out any that does fall in. install new gasket and torque sump to proper specs and reassemble.

Jul 20, 2014 | Briggs & Stratton Garden

1 Answer

Oil leaking down from the intake area

is it leaking at the front of the motor were the timing belt covers very front of the engine even though it is transversely mounted.if it seems to be coming from higher than that check for a plug PCV valve vacuum hose, or other breathing or oil flow restriction

Mar 20, 2014 | Vehicle Parts & Accessories

1 Answer

2000 has gas in oil

there has to be a gasket failure somewhere..doubt if the truck has a mechanical pump on it but if so equipted the pump diaphram has failed and is pumping raw fuel into the engine block.. replace this pump and the issue should go away...most pumps were mounted in the fuel tank and are electrically it may be a tbi gasket failure or line leak somewhere check all and repost findings..thnx

Jan 20, 2013 | 2000 Chevrolet Tahoe

1 Answer

Husqvarna 141 oil leak

This model was notorious for leaking oil, there were a number of issues, one of which was the fit of the seals around the oil pump assembly, the inner and outer sealing was replaced by a single piece seal to make it better part no. 545037101, there were also issues with the oil tank itself, the outer half was friction welded on to the inner, some of the seams were not very good and oil would leak from there, in very extreme cases the muffler would leak exhaust gas onto the top of the tank and melt a hole in the tank.

Feb 26, 2011 | Husqvarna "Chain Saw - 16" Bar, 3 Hp

1 Answer

Im replacing my oil tank on my 1972 harley. do i have to remove the inner primary or can i remove rear wheel and fender to remove and replace?

Neither. You oil tank will come out without removing any of the stuff you mentioned. You must take the rubber vibration mounts off and if you work the tank just right, it'll come out. The manual on the old Shovelheads state that you must remove the tank every other oil change to wash it out due to the clutch debris that gets into the tank. I stock configuration, the oil that oils the primary chain is pumped back into the engine and then into the tank. If you just cannot get it out, take the inner primary off. That's a lot of work though. But, if you got to, you got to.

Good Luck

Feb 19, 2011 | Harley Davidson FLHT Electra Glide...

1 Answer


It would appear that you must 'go under the cover'. Look for a damaged oil line or split oil tank. The oil pump may have come loose from it's mounting. Be sure to check the oil filter for plugging. Hope this helps!

Dec 21, 2010 | Garden

2 Answers

I have an oil leak it looks like it could be coming from a hose behind the oil tank on my 2001 sportster. It's not a lot but it lands on the swing arm and belt guard. What might be the cause?

sounds like the oil tank ..if the battery is mounted to the oil tank like the older sportster they were noted for the brackets cracking were they were welded to the tank it will not usually be a big leak as it is a fine crack but annoying pull the battery out get a good light ..clean the back side of the tank with some brake clean where the brackets mount to it ..push down on the battery bracket watch on the oil tank for cracking you have to look close ...had this same problem with a 1988 sporty...hope this helps

Aug 01, 2009 | Harley Davidson XL 1200 C Sportster Custom...

1 Answer

I have a 1992 Suzuki Sidekick with 133000 miles on it which seems to use 1 quart of coolent every 500 miles which I can not determine the cause---oil is clean, no white exaust, no leaks -it gets driven...

dropping level where, the rad top cap neck?
or that silly side tanks, that fail. (hoses bad)
if the side expansion tank drops (it will every cool down)
and goes up hot its ok,, its doing its job.
if the exp, goes dry , the then you have a breach.

yes its going somewhere,
you do know that for a fact.
here is the list
1: to the ground.
2: to the passengers does(footwells, heater core not baypassed)
3: to the engine oil pan, milky oil
4: a/t trans same dead, milky ATF
5: rad cap bad and vacuum breaker bad, in it,
6: side exp, tanks main tube missing cracked or fell off.
7: engine is eating, bad headgasket or crecked head, etc.

Mar 17, 2017 | 1992 Suzuki Sidekick

2 Answers

1993 chev. cavalier RS convt. has oil leak somewhere

this being a side mounted 3.1 liter (v6) the front of the engine would be on the right side of the car from the driver's perspective. if the oil is coming from that side cocentrate your pinpointin there, make sure it is not one of the valve cover gaskets and oil is running down from the top (common) and making pinpoiinting the leak difficult because it tends to spreak on its way down. Seals tand to leak more when the engine is running, so you may have to run it while parked for a little while and check for the leak. It may be the crankshaft seal if it is localized to below the crankshaft; Or if it is coming out of the timing cover then it may be the camshaft seal of the lower intake seal. Intake seal leakes are next to valve cover gasket leak the most common on those engine. Update us. Good luck.

Feb 02, 2009 | 1993 Chevrolet Cavalier

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