leaking engine

MA70 Owner · 08-31-2010, 06:47 PM

it most likely the rear main seal ive had the same problem. you said you replaced it put the truth is it probably wasnt done right i would try that first because its easy to access and the seal is fairly cheap.

Ranma · 08-31-2010, 07:03 PM

I let Riverside Toyota of Tulsa change the rear main seal when they changed the clutch. You would think the dealer would do a proper job. I know where not to buy my next new car. Suppose I could bring it by the competition dealer. The maintenance "adviser" said something about a seal on the backside of the engine leaking. He said this to me not long before getting sacked. What could he be talking about? He said the engine had to be removed to fix it.

Bill UK · 08-31-2010, 08:39 PM

No need to pull the engine to replace the rear crankshaft seal and gasket, especially in a fully equipped professional garage. Remove the gearbox clutch & flywheel and your there. Now if it was the sump (oil pan) leaking at the rear, then you need to lift the engine or remove the front sub frame to drop the sump.

Bill UK · 08-31-2010, 09:52 PM

There you go ! all the likely places where an oil leak could accrue; I’ve marked the oil gallery plug only for reference, its very unlikely this would leak.

Ranma · 08-31-2010, 10:03 PM

Got a chance to look under her at the wheel shop. She is leaking from the rear main, the oil pan, the oil plug. Talking with the owner of the shop he thinks the main bearings may be bad. This would cause the seals to leak.
My gripe is they were suppose to repair these items. You would think the Toyota dealer would do a proper job. Well gotta run, school tonight a biology exam

Green7mgte · 09-01-2010, 02:15 AM

sounds like someone is entitled to a free repair.

Ranma · 09-01-2010, 04:02 PM

Talked to the General Manager of the dealer. He was unable/unwilling to help. He is passing this off to the service manager or the person I have been dealing with on this problem. If I felt better would do the work myself. Could a worn out bearing cause the seal to leak? My thing in life is aircraft structural repair and not piston engines. Even that has been some time ago, the Corps has me warming an office chair now

cre · 09-02-2010, 02:17 AM

A bad bearing would have to be causing a lot of harsh vibration to kill a GOOD rear main seal. If the seal was already on its way out there would still have to be a significant amount of vibration to finish the job.... or you could starve the seals of oil to help kill them off quickly; the wipers or lips ride on a thin sacrificial layer of oil (that's right, an intentional, itty bitty leak) which lubricates and actually helps prevent any larger volume from flowing through (they're directional for a reason too.

). Now, if the thrust washer is shot and there's significant lateral movement it may contribute further.

The oil pan and gallery seals would not be affected the subtle vibration of a bad main bearing or three.

As stated before, the rear main can be done without pulling the engine... it's still a decent amount of work but not $3000 worth.

08-31-2010, 06:47 PM	#1
MA70 Owner Stock Join Date: May 2010 Location: Albuquerque Posts: 5	rear main seal... it most likely the rear main seal ive had the same problem. you said you replaced it put the truth is it probably wasnt done right i would try that first because its easy to access and the seal is fairly cheap.

08-31-2010, 07:03 PM	#2
Ranma 12psi boost Join Date: Jun 2010 Location: Claremore, OK Posts: 326 Blog Entries: 10	I let Riverside Toyota of Tulsa change the rear main seal when they changed the clutch. You would think the dealer would do a proper job. I know where not to buy my next new car. Suppose I could bring it by the competition dealer. The maintenance "adviser" said something about a seal on the backside of the engine leaking. He said this to me not long before getting sacked. What could he be talking about? He said the engine had to be removed to fix it. __________________ 1986 Mk III MA70 7MGE Targa Top 5 Speed Stock Exhaust

08-31-2010, 10:03 PM	#5
Ranma 12psi boost Join Date: Jun 2010 Location: Claremore, OK Posts: 326 Blog Entries: 10	the dealer messed up Got a chance to look under her at the wheel shop. She is leaking from the rear main, the oil pan, the oil plug. Talking with the owner of the shop he thinks the main bearings may be bad. This would cause the seals to leak. My gripe is they were suppose to repair these items. You would think the Toyota dealer would do a proper job. Well gotta run, school tonight a biology exam __________________ 1986 Mk III MA70 7MGE Targa Top 5 Speed Stock Exhaust

09-01-2010, 02:15 AM	#6
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	sounds like someone is entitled to a free repair. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

09-01-2010, 04:02 PM	#7
Ranma 12psi boost Join Date: Jun 2010 Location: Claremore, OK Posts: 326 Blog Entries: 10	Talked to the General Manager of the dealer. He was unable/unwilling to help. He is passing this off to the service manager or the person I have been dealing with on this problem. If I felt better would do the work myself. Could a worn out bearing cause the seal to leak? My thing in life is aircraft structural repair and not piston engines. Even that has been some time ago, the Corps has me warming an office chair now __________________ 1986 Mk III MA70 7MGE Targa Top 5 Speed Stock Exhaust

08-31-2010, 08:39 PM	#3
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	No need to pull the engine to replace the rear crankshaft seal and gasket, especially in a fully equipped professional garage. Remove the gearbox clutch & flywheel and your there. Now if it was the sump (oil pan) leaking at the rear, then you need to lift the engine or remove the front sub frame to drop the sump.

08-31-2010, 09:52 PM	#4
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	There you go ! all the likely places where an oil leak could accrue; I’ve marked the oil gallery plug only for reference, its very unlikely this would leak.

09-02-2010, 02:17 AM	#8
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	A bad bearing would have to be causing a lot of harsh vibration to kill a GOOD rear main seal. If the seal was already on its way out there would still have to be a significant amount of vibration to finish the job.... or you could starve the seals of oil to help kill them off quickly; the wipers or lips ride on a thin sacrificial layer of oil (that's right, an intentional, itty bitty leak) which lubricates and actually helps prevent any larger volume from flowing through (they're directional for a reason too. ). Now, if the thrust washer is shot and there's significant lateral movement it may contribute further. The oil pan and gallery seals would not be affected the subtle vibration of a bad main bearing or three. As stated before, the rear main can be done without pulling the engine... it's still a decent amount of work but not $3000 worth. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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