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Re: smell of oil
If there are no leaks steam \ pressure wash the engine and trans most repair shops can put it on a hoist and do this call around and ask u gotta tell em u want it cleaned really good top and bottom
if u still smell oil then u got a leak a dye test can pinpoint the leak if any
let me know how it goes
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Most likely, A good "burn" is the right Fuel-air mixture. Too much fuel bad burn lots of black smoke. Not enough fuel It may not burn at all. Any emission codes? I will bet it won't pass an emissions test, so get it fixed. Probably affects mileage. Do you smell fuel in the engine compartment? you have a dangerous leak. Or do you smell at exhaust? Do you smell in the cab?
Probably leak in engine bay, or even under the truck's fuel line, filter, pump. or tank.
1) Carburetter (Flooding/Linkages/Overflow/Butterfly Vanes) i) Air-Filter Assy. open and clean, check for leaks/holes ii) Fuel Delivery System iii) Fuel Tank for rust/sediments iv) The grime on the carb can be from regular running and if the carb floods, then gummy petrol smelling deposit. v) Also Check the Distributor Advance/******. vi) If there is grime inside the carb, then the air-filter has a leak.
2) For the transfer-case 2A) Check if the oil on the T-Case is gear-oil (sulphur smell) or black/brown Engine Oil.
2B)If it is Engine Oil then you may have a problem with your i) Crank Case
iii) Main Bearing Seals, this is the worst case, indicated by the clutch becoming slippery i.e engine oil on the clutch pate & Assy.
2A ii) Check and clean the Breather Plugs. If the Plugs are blocked, then while running, the oil heats up and the hot air/gasses cannot escape, thereby creating a High Pressure inside the T-Case and vent through the oil-seals or weaker joints (sealing).
iii) After Cleaning the Breather if there is Gear Oil on the T-Case after running, service the T-Case.
check the coolant level to see if it has dropped.Then look under the engine,for any leaks.Look for pools of coolant on top of the engine,or run down on the sides of the engine.Then look for radiator hoses,ans heater hoses that are leaking.If you are loosing antifreeze ,and you are sure the coolant is going somewhere,you may sill have a head,or head gasket,that are bad.If it has not been long before the head change,then the antifreeze may be still present in the exhaust,or on the engine,so you may have to wait a little longer for smell to disapate.Cleaning the engine can help.
Get under there and look to see where oil is escaping. Oil, like everything else runs downward. Therefore it may be coming from the top of the engine. If you have a 4.0, the valve covers are plastic and tend to leak a bit... Generally you can gently (or you will break them off) tighten the v/c fasteners and eliminate most if not all of the seepage. If it continues, replace the gasket. There is only one seal between trans and engine, called a rear main seal. It is better left alone. It's a big job and best done by a shop.
You have a coolant leak most likely in the heater core. Try disconnecting your heater hoses and coupling them together, then running the engine to see if the leak goes away. If it does, I would have the heater core replaced.
the small radiator just inside the cab, where the hoses go to the heater is leaking. You may try using stop leak (many don't recommend this) or take off the heater radiator. it will probably get worse when you turn on the heater and fog up the windshield if not fixed. hope this helps.