86.5 7MGE Problems

[86.5 7MGE]

Originally Posted by oregonjoe

Check your plugs - if they look like coolant or have deposits its a BHG - Start with NO 6 as that is the most common - All plugs should be dry and light tan. Mine ran rough after sitting overnight and was burning coolant same on acceleration

I didn't find coolant but I did find oil...I have already replaced my No 3 valve cover with O Ring Gaskets covered in RTV, and they are not leaking so that means it's coming from inside. All 6 of my plugs were covered completely in oil
And on top of all of this my car won't even start now that I got the water pump back on and coolant back in and new plugs. I'm thinking it's possible that I might have messed up my timing since the pulleys were spinning while I was trying to get the fan off.

[86.5 7MGE]

Also, I found black residue in my intake manifold when I was changing out my plugs.

[cre]

You don't get WET oil on spark plugs unless it's coming from outside the engine... in the 7M's case, valve cover seals and the three galley cover bolts are the only place it'll come from.

The oil inside the plenum is a side effect of a functional PCV system. Excessive amounts may point to a problem with blowby due to worn rings, a leak down test would tell you what shape the rings are in.



Automatic radiators had a small oil cooler for the transmission fluid. http://www.cygnusx1.net/Supra/Librar...spx?F=1603&P=3



Pitting around water jackets is the result of the wrong type of coolant being used... it's due to a dielectric reaction. Thoroughly fluch your cooling system and switch to Toyota's red coolant to prevent further damage. Supposedly, the newer green coolant formulas are better at preventing this type of corrosion, but if you're already seen signs of damage I'd switch coolant soon.

NOTE: You MUST thoroughly flush the coolant system out before changing from one type of coolant to another. Failure to do so could result in emulsification.

[86.5 7MGE]

Originally Posted by cre

You don't get WET oil on spark plugs unless it's coming from outside the engine... in the 7M's case, valve cover seals and the three galley cover bolts are the only place it'll come from.

The oil inside the plenum is a side effect of a functional PCV system. Excessive amounts may point to a problem with blowby due to worn rings, a leak down test would tell you what shape the rings are in.



Automatic radiators had a small oil cooler for the transmission fluid. http://www.cygnusx1.net/Supra/Librar...spx?F=1603&P=3



Pitting around water jackets is the result of the wrong type of coolant being used... it's due to a dielectric reaction. Thoroughly fluch your cooling system and switch to Toyota's red coolant to prevent further damage. Supposedly, the newer green coolant formulas are better at preventing this type of corrosion, but if you're already seen signs of damage I'd switch coolant soon.

NOTE: You MUST thoroughly flush the coolant system out before changing from one type of coolant to another. Failure to do so could result in emulsification.

Yea, I have been finding myself replacing my plugs like every 4 to 6 months because I can feel a restriction in my plugs and usually they are fouled out. I have replaced my No 3 trash gasket with some O Ring washers so maybe they are not holding up like I thought they would I'll recheck them to make sure didn't feel any oil leaking from them the last time I checked two days ago. This guy that worked at a parts store told me that I might want to switch from using synthetic oil to high mileage or regular oil and that should fix my plugs being covered in oil problem. The way he described it as it is so thin that it's blowing right past my rings in my pistons. He said that should fix it, just a guess of course cause that was supposedly his problem with his 88 corvette.

[cre]

I'm going to be disgustingly blunt here... if you don't like it, I'll apologize in advance... I'm sorry.

The parts store guy is a F@#$ing idiot and you really need to find a mentor to help you out while you learn your way around the engine bay.


There is NO WAY a running engine will get WET oil on the plugs much less soak the THREADS which happen to be outside of the combustion chamber! NONE! The parts guy is an idiot and you've got leaking valve covers or the bolts which hold down the No3 gasket.

Wet oil around the plug wires can cause shorts to ground and a heavy miss... the fact that replacing them makes it feel better for a while is because each time you pull them you're dumping all the oil that was surrounding them into the cylinder and thus eliminating the real problem for a little while.

A plug which has seen burning oil is black, but it's dry.

[86.5 7MGE]

Originally Posted by cre

I'm going to be disgustingly blunt here... if you don't like it, I'll apologize in advance... I'm sorry.

The parts store guy is a F@#$ing idiot and you really need to find a mentor to help you out while you learn your way around the engine bay.


There is NO WAY a running engine will get WET oil on the plugs much less soak the THREADS which happen to be outside of the combustion chamber! NONE! The parts guy is an idiot and you've got leaking valve covers or the bolts which hold down the No3 gasket.

Wet oil around the plug wires can cause shorts to ground and a heavy miss... the fact that replacing them makes it feel better for a while is because each time you pull them you're dumping all the oil that was surrounding them into the cylinder and thus eliminating the real problem for a little while.

A plug which has seen burning oil is black, but it's dry.

No worries CRE, you seem like you know way more about the Supra then them and I'm not calling you wrong on this, because what you said makes more since than anything any of these parts guys has been telling me. I still consider myself quite new to the Supra, it's become a headache at times, but I still love the Supra it's an awesome machine. Hey, since your in Denver also would you care to be my mentor?

[cre]

I'm not up for mentoring... I haven't the patience for it. I may be persuaded into coming over and having a look and helping you figure out where to start though. PM me your email address or phone number.

If you haven't already, order new valve cover gaskets. They're not that expensive and I'm positive that's where your oil is coming from (it's VERY common). Even if the gaskets are still soft they compress over the years and will fail to seal no matter how hard the covers are tightened (NEVER over tighten the valve cover bolts! The covers warp easily enough and then you're screwed.). The valve covers are supposed to be tightened at 22 INCH lbs... NOT ft.lbs. If you don't have a torque wrench capable of such fine measurement then use a screwdriver and only tighten them hand tight. Some people like to switch out the phillips head screws for bolts; that's fine, but you still need to make sure you're not over tightening them.

[AAPSuprabuilder]

Originally Posted by cre

I'm going to be disgustingly blunt here... if you don't like it, I'll apologize in advance... I'm sorry.

The parts store guy is a F@#$ing idiot and you really need to find a mentor to help you out while you learn your way around the engine bay.


There is NO WAY a running engine will get WET oil on the plugs much less soak the THREADS which happen to be outside of the combustion chamber! NONE! The parts guy is an idiot and you've got leaking valve covers or the bolts which hold down the No3 gasket.

Wet oil around the plug wires can cause shorts to ground and a heavy miss... the fact that replacing them makes it feel better for a while is because each time you pull them you're dumping all the oil that was surrounding them into the cylinder and thus eliminating the real problem for a little while.

A plug which has seen burning oil is black, but it's dry.

I hope you never work on a car ever. especially if you dont know what spark plug problems are...
If a plug is wet. that means one of 3 things....

bad valve covers (most likely not)
blown head gasket and oil getting into the combustion chamber
or piston rings are shot.

maybe you should watch who u call names at a parts store especially if your the one with the issue not knowing whats going on... just saying.

[cre]

Originally Posted by AAPSuprabuilder

I hope you never work on a car ever. especially if you dont know what spark plug problems are...
If a plug is wet. that means one of 3 things....

bad valve covers (most likely not)
blown head gasket and oil getting into the combustion chamber
or piston rings are shot.

maybe you should watch who u call names at a parts store especially if your the one with the issue not knowing whats going on... just saying.

Dripping wet when you pull them? Not a chance in hell... not unless there's a hole in the F$%^ing piston... ALL of them in this case. An engine with completely shot rings still creates enough blowby to ensure that most of the oil that does enter the cylinder is burned. This is a VERY common problem too. Additionally, I've been to the OP's place... it IS his valve covers.

[Krem]

Originally Posted by AAPSuprabuilder

I hope you never work on a car ever. especially if you dont know what spark plug problems are...
If a plug is wet. that means one of 3 things....

bad valve covers (most likely not)
blown head gasket and oil getting into the combustion chamber
or piston rings are shot.

maybe you should watch who u call names at a parts store especially if your the one with the issue not knowing whats going on... just saying.

I'd have Cre work on my car before any schmuck in vegas... except Vegas is a ways away from Colorado... and my ride has too many kinks to trouble him with at the moment. Cre knows what he's talking about and even in your statement, AAPSuprabuilder, you mentioned bad valve covers which Cre already said it WAS. So how's he ill knowledgable exactly? Sometimes being smart isn't about knowing the right answer, it's about knowing your limits and recognizing when you could be wrong.

Grats 86.5, and Cre... have fun racing (to vegas )