Blown Motor????? Please help!

ebang · 03-20-2012, 04:17 PM

Did nothing different, was just driving home from work like normal.
The olny thing out of the ordinary was a pin hole leak of the coolant from a hose, but I was keeping a close eye and made sure it was topped up every trip to and from work...the drive is 20 minutes and after wards the resoviour was still filled of coolant.

hbski · 03-20-2012, 07:03 PM

just a thought.....i also had a sparkplug boot "pop" off.the reason for my issue was oil in the plug gallery,quite a bit. I was surprised those bolts could leak that much.

Ranma · 03-20-2012, 07:31 PM

Quote:

Originally Posted by ebang

Did nothing different, was just driving home from work like normal.
The olny thing out of the ordinary was a pin hole leak of the coolant from a hose, but I was keeping a close eye and made sure it was topped up every trip to and from work...the drive is 20 minutes and after wards the resoviour was still filled of coolant.

Did the hose pop losing all cooling fluid? Where did all of the oil come from? Have you checked the engine for physical damage? Do you see any signs of an explosion? Really did you add any thing to the petrol?

cre · 03-20-2012, 08:05 PM

More basic info about the nature if the failure is needed before any further diagnosis can be performed. Please read me post again. Additionally, even saturated with oil tension lines don't pop off. The interfacing clip has a strong spring on it and unless it isn't locked into place it isn't going to come off from anything short of a hole opening in the spark plug letting the combustion gases literally blow it off...

EDIT: More often than not the oil in the galley is from leaking valve cover seals. See the MKIII FAQ section for information. When installing new seals DO NOT OVER TORQUE THEM! (That goes for just about every screw on the car... spark plugs too.)

ebang · 03-21-2012, 01:33 PM

None of the coolant hoses popped off or exploded all were good and coolant was still in the car.
There was oil in the spark plug galley but I had already know about the valve gasket leak. Could this have cause alll of this??

The plastic on the spark plug wires were melted on to the plugs.

I will try to do some more investigation this weekend and try to locate the oil leak...as for any physical ddmage I can't see any.

The car was driving just fine before...no warning lights no strange noises, pressure and temp gages alll good...nothing..

hbski · 03-21-2012, 05:19 PM

In my case,I believe the oil starts to boil and burn giving off gases and smoke, building pressure under the #3 gasket.enough to force the high tension wire to pop out.the oil is boiling enough to coat the open hood. I have not started working on mechanical issues,so this is just what i have observed.not sayin' it's your issue.But cre is absolutely right,as usual

check to see if it's going to be worth your effort.

cre · 03-21-2012, 07:06 PM

Oil doesn't boil until well beyond 500?F.... some blends only hit boiling point for mere moments before flashing (exploding into flame). If the oil in your plug galley is reaching those temps regularly then save yourself the time and set the car on fire now before it does it for you and without your consent.

Oil will degrade plastics, rubbers and silicone if left in contact with those materials. It's not uncommon for them to reduce to a glob of goop resembling melted plastic. It is not going to soften the spring clips at the ends of the wires... If the wires are coming off they A) are some amazingly cheap crap; B) Are stretched out from improper installation/removal/handling; C) are too short (either in total length or the available length in the boot in which case more wire just needs to be pushed into the boot).

The #3 valve cover gasket is not designed to old in pressure. Actually the way it's designed it's almost like a check valve (only when new). Even if there were significant gas building up in there the most you'd see is the top seal of the spark plug boot popping out to let the gas vent. A cracked head, spark plug hole with the threads completely stripped or a spark plug which has somehow developed a hole all the way through are the only ways I can see a plug wire literally getting blown off on this engine.

ebang, it sounds like the vehicle may have very seriously overheated from a sudden loss of oil. Do a compression test already... details are in the TSRM, it's quite easy. Drain and inspect the oil. Use a clean drain pan so that you're sure that any grit or moisture is from the engine. Drain and inspect the coolant (you can't judge based on what's in the reservoir).

ebang · 03-21-2012, 07:57 PM

Hey CRE, thanks for all of the input, I will drain the oil and coolant to see whats up with them, the compression test will be done sunday, a freinds is bringing the kit by to assist.

03-20-2012, 04:17 PM	#1
ebang 3" Exhaust Join Date: Feb 2007 Location: Canada Posts: 99	Did nothing different, was just driving home from work like normal. The olny thing out of the ordinary was a pin hole leak of the coolant from a hose, but I was keeping a close eye and made sure it was topped up every trip to and from work...the drive is 20 minutes and after wards the resoviour was still filled of coolant. __________________ 1987 N/A Targa 5 speed no mods as yet

03-20-2012, 08:05 PM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	More basic info about the nature if the failure is needed before any further diagnosis can be performed. Please read me post again. Additionally, even saturated with oil tension lines don't pop off. The interfacing clip has a strong spring on it and unless it isn't locked into place it isn't going to come off from anything short of a hole opening in the spark plug letting the combustion gases literally blow it off... EDIT: More often than not the oil in the galley is from leaking valve cover seals. See the MKIII FAQ section for information. When installing new seals DO NOT OVER TORQUE THEM! (That goes for just about every screw on the car... spark plugs too.) __________________ 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 ---> Last edited by cre; 03-20-2012 at 08:08 PM.

03-21-2012, 01:33 PM	#5
ebang 3" Exhaust Join Date: Feb 2007 Location: Canada Posts: 99	None of the coolant hoses popped off or exploded all were good and coolant was still in the car. There was oil in the spark plug galley but I had already know about the valve gasket leak. Could this have cause alll of this?? The plastic on the spark plug wires were melted on to the plugs. I will try to do some more investigation this weekend and try to locate the oil leak...as for any physical ddmage I can't see any. The car was driving just fine before...no warning lights no strange noises, pressure and temp gages alll good...nothing.. __________________ 1987 N/A Targa 5 speed no mods as yet

03-21-2012, 07:06 PM	#7
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Oil doesn't boil until well beyond 500?F.... some blends only hit boiling point for mere moments before flashing (exploding into flame). If the oil in your plug galley is reaching those temps regularly then save yourself the time and set the car on fire now before it does it for you and without your consent. Oil will degrade plastics, rubbers and silicone if left in contact with those materials. It's not uncommon for them to reduce to a glob of goop resembling melted plastic. It is not going to soften the spring clips at the ends of the wires... If the wires are coming off they A) are some amazingly cheap crap; B) Are stretched out from improper installation/removal/handling; C) are too short (either in total length or the available length in the boot in which case more wire just needs to be pushed into the boot). The #3 valve cover gasket is not designed to old in pressure. Actually the way it's designed it's almost like a check valve (only when new). Even if there were significant gas building up in there the most you'd see is the top seal of the spark plug boot popping out to let the gas vent. A cracked head, spark plug hole with the threads completely stripped or a spark plug which has somehow developed a hole all the way through are the only ways I can see a plug wire literally getting blown off on this engine. ebang, it sounds like the vehicle may have very seriously overheated from a sudden loss of oil. Do a compression test already... details are in the TSRM, it's quite easy. Drain and inspect the oil. Use a clean drain pan so that you're sure that any grit or moisture is from the engine. Drain and inspect the coolant (you can't judge based on what's in the reservoir). __________________ 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 --->

03-21-2012, 07:57 PM	#8
ebang 3" Exhaust Join Date: Feb 2007 Location: Canada Posts: 99	Hey CRE, thanks for all of the input, I will drain the oil and coolant to see whats up with them, the compression test will be done sunday, a freinds is bringing the kit by to assist. __________________ 1987 N/A Targa 5 speed no mods as yet

03-20-2012, 07:03 PM	#2
hbski Stock Join Date: Jun 2010 Location: canada Posts: 10	just a thought.....i also had a sparkplug boot "pop" off.the reason for my issue was oil in the plug gallery,quite a bit. I was surprised those bolts could leak that much.

03-21-2012, 05:19 PM	#6
hbski Stock Join Date: Jun 2010 Location: canada Posts: 10	In my case,I believe the oil starts to boil and burn giving off gases and smoke, building pressure under the #3 gasket.enough to force the high tension wire to pop out.the oil is boiling enough to coat the open hood. I have not started working on mechanical issues,so this is just what i have observed.not sayin' it's your issue.But cre is absolutely right,as usual check to see if it's going to be worth your effort.

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