need this answered to save my motor - Toyota Nation Forum : Toyota Car and Truck Forums

Camry_Man08 · 03-06-2010, 01:56 PM

ok guys im starting to get pissed off with every 7mge engine out there the reason being is i just bought on with no more that 35,xxx miles on the motor and just yesterday i was looking at the motor and i noticed that the cylinder 6 cable was not all the way in. So when i went to go and secure it to the plug i noticed ALOT of oil surrounding the plug. just today i looked at the motor again to find the samething in cylinder 3 my damn plugs are just swimming in oil why is this???
Also at start up it runs fine until I rev the engine to about 2k rpm then it starts sputtering but when driven normally it runs fine sometimes and other times it just backfires. but the main question is why are my plugs swimming in oil??

SupraTuned · 03-06-2010, 03:25 PM

Chances are, your valve cover seals are shot. But, for worst case scenario, it could be a cracked head. Check your valve covers and go from there.

Camry_Man08 · 03-06-2010, 04:04 PM

yeah i just asked my dad and he said that the rings were floating which allowed all this oil into all my plugs. I guess that this would be covered by the company i purchased the engine from since it is an internal part. i just want all the problems with the 7m to go away. maybe i should just go out and buy a jdm SupraTT lol then be done with the problems lol soon to be next year actually 96-98 2jz-gte ftw

SupraTuned · 03-06-2010, 08:38 PM

Yeah, the 7m is a good engine, it has its problems, but its solid. I'll admit i was pissed at my car this last week because the cps started acting up but it turned out to be the connector, replaced it and all fixed. Now shes ripping just like before.

Camry_Man08 · 03-07-2010, 01:12 PM

nice i just wish replacing the valves was just as easy lol. I guess tomorrow i will find out what i can do about it either my mechanic can fix it or i'll just have to send it back to canada so the company can do something about it. even for a stock 7m i was keeping up with h23 preludes that were build lol

***bgrieger*** · 03-07-2010, 08:28 PM

wait a minute...did you just say that someone diagnosed a simple oil leak as "floating rings"? WTF is a floating ring, and how does that have to do with an external engine oil leak?

Jeeves · 03-08-2010, 02:21 AM

Quote:

Originally Posted by Camry_Man08

yeah i just asked my dad and he said that the rings were floating which allowed all this oil into all my plugs.

[img]http://xd.**********s.com/uploads/6b5dbfb5dd.gif[/img]

Ignore the fact that these aren't for OUR car, but these things after 20+ years are probably shot:

Good ole valve cover gaskets.

It's OLD news and probably a very simple fix.

Camry_Man08 · 03-11-2010, 01:15 PM

so a shot valve cover gasket can cause oil to get in to the plugs and have enough oil in there to look like the plugs are submerged in the oil???

SupraTuned · 03-11-2010, 01:48 PM

Most certainly. If the seal is shot near the inside of the valve cover to where the oil coming out can leak into the middle of the head, over time, you bet you'll get that. My friends 7mge had that problem and had about an inch of oil in there, probably from over the course of many miles. And yeah, about the "floating rings" business, please don't ask your dad to diagnose any more problems please. (for your cars saftey)

Jeeves · 03-12-2010, 01:22 AM

2minute diagram.

[img]http://xd.**********s.com/uploads/5cd18d43de.gif[/img]

Camry_Man08 · 03-12-2010, 12:18 PM

jeeves that is exactly what it looks like so it wouldn't be piston rings either? It also only overheats when i drive it and the coolant must be going somewhere but when my mechanic looked at it neither one of us saw coolant in the oil so what could be the overheating problem? By the way its a brand new radiator.

Jeeves · 03-12-2010, 06:41 PM

Quote:

Originally Posted by Camry_Man08

jeeves that is exactly what it looks like so it wouldn't be piston rings either? It also only overheats when i drive it and the coolant must be going somewhere but when my mechanic looked at it neither one of us saw coolant in the oil so what could be the overheating problem? By the way its a brand new radiator.

Because that's not where they are.

Loose piston rings will cause blow-by, excessive crank-case pressure and smoking. Not random oil up top. That extra pressure can cause excessive PCV venting, but that doesn't mean what you think it means.

So, let's quit using my mocked up diagram. While this isn't the 7M, it should give a far better feel, I've drawn in the metal cover sitting over the spark plug, the oil in the valve covers and the leaks.

Forgive the fact I saved it to a crappy format, but:
[img]http://xd.**********s.com/uploads/887d4daaf5.gif[/img]

That's close enough that it should make sense.

The combustion chamber isn't just filled with oil, carrying it up to the spark plugs.

As for overheating, I never once saw coolant in my oil when I've had BHG's. So, take that as you will. My coolant was leaking into the combustion chamber and being burned and I was pushing hot gasses back into the coolant passages.

Here's a cutaway side view of an engine (also not ours):

Can't see everything well, but this should look familiar:
[img]http://xd.**********s.com/uploads/58d091320b.jpg[/img]

So, neverminding ALL of this info. It's a WELL known issue.

Camry_Man08 · 03-13-2010, 12:44 PM

ok well it white smokes a little but not alot so just for safety i should just get the valve covers and hg replaced?

Jeeves · 03-15-2010, 10:48 AM

The HG is not just a simple replace job.

And it's the valve cover gaskets that need replacing, just a rubber stopper that wedges into the bottom of the valve covers themselves.

Jeeves · 03-17-2010, 10:45 AM

And just because I just did these, here's the toyota part number and what they look like compare to old ones:

That's price per side:
[img]http://www.**********s.com/supra/valve_cover_gasket_part.jpg[/img]

Can you guess which side is old?

[img]http://www.**********s.com/supra/valve_cover_gasket.jpg[/img]