possible blown Head Gasket

2Fast2Furious · 12-04-2009, 11:23 PM

no wonder there was such a lose in power she was running on 4 cyclinders. turned out it was a faulty coil. only cost €30 for a new one and to be fitted. he said there should be a great improvement in fuel consumption - heres hoping but she sounds great and drives great.

however the mechanic still recommended I go to Toyota garage for Diagnosic system test because the engine still cuts out ever now and again when near stopping in low gear which is unrelated to the lose of power which is now fixed. so I will leave her in on Monday.

turns out that ROCKET HEAD GASKET is leaking oil and that is the burning smell under the hood so Toyota garage can replace that also. I found a link below with same problem on Skyline http://www.skylinesaustralia.com/for...sk-t71313.html. It seems the leaking ROCKET HEAD GASKET AND FECKED UP IDLYING may be related or could just be a coincidence.

In the thread in link above it mentioned idlying problem having something to do with the throttle body bypass being dirty. What are your thoughts on this?

will keep you's posted.

cre · 12-05-2009, 12:16 AM

Ok... I had no idea what you meant by rocket... that was a typo on their site and they meant rocker... not entirely accurate, we don't have rockers... it's more commonly called a cam or valve cover. Yeah, it's not uncommon for those to leak as the seals leak and the screws back out.

The bypass to which you refer is the idle speed controller... It is not uncommon for it to get clogged up with oil and dust over the years and as a result it may cause iddues with the idle.

As your valve cover are leaking I would first pull the spark plug wires and check if oil has leaked down in around the plugs; it's just as common as the leaking valves and can cause shorts.

To check for diagnostic error codes you simply need to install a jumper and count the flashes of the check engine light.... very easy and cheap. I'd start with that before paying Toyota techs to do it. :P
http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

If you're even subtly mechanically inclined I'd just replace the valve covers myself as well... the hardest part is disconnecting the throttle body (a whopping 4 bolts

). Wehn tightening the screws that hold the valve covers use some light strength thread locker and don't over tighten them.... they really only need the be a firm hand tight (just under 2 ft lbs or 2.71 Nm).

12-04-2009, 11:23 PM	#1
2Fast2Furious 3" Exhaust Join Date: Oct 2009 Location: Ireland Posts: 60	no wonder there was such a lose in power she was running on 4 cyclinders. turned out it was a faulty coil. only cost €30 for a new one and to be fitted. he said there should be a great improvement in fuel consumption - heres hoping but she sounds great and drives great. however the mechanic still recommended I go to Toyota garage for Diagnosic system test because the engine still cuts out ever now and again when near stopping in low gear which is unrelated to the lose of power which is now fixed. so I will leave her in on Monday. turns out that ROCKET HEAD GASKET is leaking oil and that is the burning smell under the hood so Toyota garage can replace that also. I found a link below with same problem on Skyline http://www.skylinesaustralia.com/for...sk-t71313.html. It seems the leaking ROCKET HEAD GASKET AND FECKED UP IDLYING may be related or could just be a coincidence. In the thread in link above it mentioned idlying problem having something to do with the throttle body bypass being dirty. What are your thoughts on this? will keep you's posted. Last edited by 2Fast2Furious; 12-04-2009 at 11:33 PM.

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12-05-2009, 12:16 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Ok... I had no idea what you meant by rocket... that was a typo on their site and they meant rocker... not entirely accurate, we don't have rockers... it's more commonly called a cam or valve cover. Yeah, it's not uncommon for those to leak as the seals leak and the screws back out. The bypass to which you refer is the idle speed controller... It is not uncommon for it to get clogged up with oil and dust over the years and as a result it may cause iddues with the idle. As your valve cover are leaking I would first pull the spark plug wires and check if oil has leaked down in around the plugs; it's just as common as the leaking valves and can cause shorts. To check for diagnostic error codes you simply need to install a jumper and count the flashes of the check engine light.... very easy and cheap. I'd start with that before paying Toyota techs to do it. :P http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx If you're even subtly mechanically inclined I'd just replace the valve covers myself as well... the hardest part is disconnecting the throttle body (a whopping 4 bolts ). Wehn tightening the screws that hold the valve covers use some light strength thread locker and don't over tighten them.... they really only need the be a firm hand tight (just under 2 ft lbs or 2.71 Nm).