Newbie has a question

JohnFurness · 03-15-2011, 05:44 PM

Just bought a 87 MKiii and also new to treads, its runs great but just has a small oil leak. i checked where the oil is coming form and its coming from the transmission? now i know its not transmission fluid because its very thin. i removed the clutch cover and oil was drip out. anyone know how or why oil would be in the transmission?

Ranma · 03-15-2011, 06:23 PM

Oh it could be anything from the valve cover gasket to a cracked head. My guy had a "mystery" leak, turned out to be a cracked head. Very close to the valve cover gasket.

JohnFurness · 03-15-2011, 06:32 PM

But how would the oil get in the transmission housing ?

Ranma · 03-15-2011, 06:49 PM

Mine was dripping from the tranny too. Changed out the rear main gaskets, the front gaskets, the valve cover gasket, etc. Then they used a dye and with the valve cover off discovered the leak. The 7mge and 7mgte have a problem with their head gaskets. After an overhaul and a rebuilt head, mine does not leak at all.

Not sure how mine found its way there but it did.

Sonyps307 · 03-15-2011, 09:24 PM

Look down behide the motor and look at the housing if it's all wet with oil then maybe valve covers or cracked head. If not then maybe it's the rear main.

87hilux7mge · 03-31-2011, 01:48 AM

agreed. i think its the rear main seal. check the rear of the motor, see if its coated with oil. if so, head gasket prolly. if just inside the bellhousing, rear main. as stated above

El_supracabra · 04-01-2011, 03:34 PM

rear main seal. check above the bell housing too.

driftstar87 · 04-02-2011, 06:40 PM

My vote is for rear main seal. I wouldn't doubt if it needed a head gasket as well like mine did.

03-15-2011, 05:44 PM	#1
JohnFurness Stock Join Date: Apr 2010 Location: Utica, NY Posts: 10	Newbie has a question Just bought a 87 MKiii and also new to treads, its runs great but just has a small oil leak. i checked where the oil is coming form and its coming from the transmission? now i know its not transmission fluid because its very thin. i removed the clutch cover and oil was drip out. anyone know how or why oil would be in the transmission?

03-15-2011, 06:23 PM	#2
Ranma 12psi boost Join Date: Jun 2010 Location: Claremore, OK Posts: 326 Blog Entries: 10	Oh it could be anything from the valve cover gasket to a cracked head. My guy had a "mystery" leak, turned out to be a cracked head. Very close to the valve cover gasket. __________________ 1986 Mk III MA70 7MGE Targa Top 5 Speed Stock Exhaust

03-15-2011, 06:49 PM	#4
Ranma 12psi boost Join Date: Jun 2010 Location: Claremore, OK Posts: 326 Blog Entries: 10	Mine was dripping from the tranny too. Changed out the rear main gaskets, the front gaskets, the valve cover gasket, etc. Then they used a dye and with the valve cover off discovered the leak. The 7mge and 7mgte have a problem with their head gaskets. After an overhaul and a rebuilt head, mine does not leak at all. Not sure how mine found its way there but it did. __________________ 1986 Mk III MA70 7MGE Targa Top 5 Speed Stock Exhaust

03-31-2011, 01:48 AM	#6
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	agreed. i think its the rear main seal. check the rear of the motor, see if its coated with oil. if so, head gasket prolly. if just inside the bellhousing, rear main. as stated above __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.

04-01-2011, 03:34 PM	#7
El_supracabra Intake Join Date: Feb 2011 Location: South of Columbus, Ohio Posts: 45	rear main seal. check above the bell housing too. __________________ 86.5 Supra NA: milled head .020, decked block .007, .5mm+ pistons, port & polished intake manifold and cyl head,OBX header, 3-angle, cold air intake, Cometic MLS HG. ALL NATURAL! CHEVROLET- Cracked Heads, Every Valve Rattles, Oil Leaks Every Time FORD- Flipped Over, Rebuilt Dodge DODGE- Dirty Old Dust Gathering Engine I'd rather drive a Toyota, than push a ford.

03-15-2011, 06:32 PM	#3
JohnFurness Stock Join Date: Apr 2010 Location: Utica, NY Posts: 10	But how would the oil get in the transmission housing ?

03-15-2011, 09:24 PM	#5
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	Look down behide the motor and look at the housing if it's all wet with oil then maybe valve covers or cracked head. If not then maybe it's the rear main.

04-02-2011, 06:40 PM	#8
driftstar87 Stock Join Date: Apr 2011 Location: Wisconsin Posts: 2	My vote is for rear main seal. I wouldn't doubt if it needed a head gasket as well like mine did.

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