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Old 12-11-2012, 12:53 AM   #1 (permalink)
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Default 98 DOHC EGR P0401 Code Fixed but Question

I was working on my son's car EGR checked out ok but had to clean passages on the intake side, after removing throttle body, code gone now. I'm a little concerned about the torq specs for the EGR valve. Autozone told me 20ft-lbs, seems ok for lower bolts that plug into iron pipe, but a little high for the ones that screw into the intake manifold. I have 2 manuals and neither one give specifications for DOHC engine. Ones a Haynes and one a Chilton, strangely enough they have the same text and pics. I did find torq specs for a 2.4l Duratec engine.
http://duratec.wikispaces.com/Bolt_Size_and_Torque

Was wondering what manual that covers this engine thourghly. I suspect about 10ft-lbs for upper EGR bolts, but would like further verification on this.

Thanks
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Old 12-11-2012, 01:22 AM   #2 (permalink)
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The EGR valve to upper intake manifold bolt torque spec is 15-22 lb-ft. The EGR valve to exhaust manifold nuts should be tightened to 89 lb-in and then turned an additional 90. Before tightening the bolts install everything loosely first.

A factory service manual would cover all this in great detail. The Haynes/Chilton's manuals leave a lot of stuff out. You can buy a used service manual one online (e.g. eBay).
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Old 12-11-2012, 08:16 AM   #3 (permalink)
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+1 on the factory manual. You can also get a subscription to alldata for $9.99 per month if you want which has data on many more cars, it's also searchable. However 5 months of that and you've paid for a factory manual.
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Old 12-11-2012, 11:30 AM   #4 (permalink)
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Egr valve "bolts" (top)= 15-22ft-lbs. Egr valve to exhaust manifold tube "nuts" (bottom)= 26-33ft-lbs. These torque specs apply to your 98tec.
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Old 12-11-2012, 04:47 PM   #5 (permalink)
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Thanks won't worry about stripping upper bolt holes now. Will pick up factory manual saw one on eBay for 30
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Old 12-11-2012, 07:35 PM   #6 (permalink)
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The above torque specs are out of Chilton/Haynes repair manuals. Chapter 2B- ohc eng.
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Old 12-11-2012, 11:55 PM   #7 (permalink)
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Thanks Sheila feel sort of dumb now . I had on my mind that they would be at the beginning of the chapter. I didn't see the throttle body on the torque list though I tightened them to 9 ft-lbs

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Old 12-12-2012, 10:29 AM   #8 (permalink)
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Haynes lists the torque specs at the beginning of ea. chapter. Chilton at the end of ea.
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