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Forum: MKIII Supra

12-08-2011, 02:03 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

For some reason I said earlier in this thread and...

For some reason I said earlier in this thread and in one other yesterday that the spec for the valve cover screws is 12 in lbs... dunno where I got that, but to clarify it's 22 in lbs.

Forum: MKIII Supra

11-22-2011, 09:40 PM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

Nope, not going to hear anything... I'm done....

Nope, not going to hear anything... I'm done. Good luck with it. :crazy2:

Forum: MKIII Supra

11-22-2011, 08:33 PM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

Before I forget, if you've over-torqued the...

Before I forget, if you've over-torqued the timing belt idler/tensioner pulley you may want to correct that as soon as possible. It's been proven that even a small fraction over spec will pull...

Forum: MKIII Supra

11-22-2011, 08:09 PM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

Ok, well if it's straight (truly flat) and the...

Ok, well if it's straight (truly flat) and the torque is relatively uniform then the most significant concerns come down to the yield strength of the fasteners and the head. You can't back it off a...

Forum: MKIII Supra

11-22-2011, 10:34 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

And that is where you've gone grievously wrong....

And that is where you've gone grievously wrong. Trust me, 99.999% of the time, the engineers who wrote the book (and in some cases helped design the parts/engine/car/whatever) know a LOT more than...

Forum: MKIII Supra

11-22-2011, 05:03 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

I'm not trying to present an overly grim picture...

I'm not trying to present an overly grim picture for you... but I'm definitely not going to portray it as something which is just fine and dandy... it's not and something may go wrong and cost you a...

Forum: MKIII Supra

11-21-2011, 11:28 PM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

Either way it's a gamble now. Compromised head or...

Either way it's a gamble now. Compromised head or compromised HG either way if it fails you're going to have to redo the job. I'd also be disinclined to reuse those bolts in the future whether they...

Forum: MKIII Supra

11-21-2011, 09:33 PM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

Google fasteners and yield strength. The head...

Google fasteners and yield strength. The head isn't designed for that level of torque (hell, your rims aren't and they have a beefier cross section) and the fasteners are designed to remain within a...

Forum: MKIII Supra

11-21-2011, 12:06 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

We've covered this. There IS a difference...

We've covered this. There IS a difference depending on whether you installed studs or bolts just as the type of lube makes a difference. If you installed studs and used the supplied moly grease then...

Forum: MKIII Supra

11-20-2011, 11:08 PM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

When selecting a torque wrench for a given job...

When selecting a torque wrench for a given job you are best choosing one where the desired torque falls within the middle 50-60% of the wrench's scale for the best accuracy. Leave a 20 to 25% margin...

Forum: MKIII Supra

11-20-2011, 09:28 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

12 in lbs is equal to 1 ft lb (seems obvious but...

12 in lbs is equal to 1 ft lb (seems obvious but many people miss it). Just a hand tightened screw will meet this level without exceeding it by much; I suspect this is a strong reason for Toyota's...

Forum: MKIII Supra

11-20-2011, 04:06 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

Don't over torque the bolts (22INCH lbs, NOT 22ft...

Don't over torque the bolts (22INCH lbs, NOT 22ft lbs) and if needed apply a little medium loctite.

EDIT: Additionally, I don't recommend allen screws. Don't use anything for which you'll need...

Forum: MKIII Supra

11-20-2011, 01:23 AM

Replies: 25

Valve cover grommets Q

Views: 4,837

Posted By cre

That link won't open for me. Whatever washers you...

That link won't open for me. Whatever washers you use make sure the rubber is either a butyl or silicone with a HIGH shore rating and absolutely NOT Neoprene; The material used for Neoprene backed...

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