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Author Topic: 353 detroit valve adjustment  (Read 3631 times)

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Offline Timbercruiser

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353 detroit valve adjustment
« on: April 28, 2013, 07:47:39 AM »
Just wanted to ask everyone about the valve lash on a 353 detroit. What is the lash supposed to be ? And did they ever recomend doing it for regular maintainance ?  I have to change the valve cover gasket and wondered if the valve lash should be checked ???

Offline John Woodworth

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Re: 353 detroit valve adjustment
« Reply #1 on: April 28, 2013, 10:13:51 PM »
 cold not running adj. pushrod to .012 and tighten and check with a .010 it should pass through and the .012 should not.
Hot engine , normal temp. .08 yes, .010 no.     This is for a 2 valve head.

4 valve cold .027 and tighten pushrod, if correct .025 will pass through, .027 no.
normal temp. .023 yes, .025 no. If your doing it warm be sure to keep the engine temp. up.
Two Garret 21 skidders, Garret 10 skidder, 580 Case Backhoe, Mobile Dimension sawmill, 066, 046 mag, 044, 036mag, 034, 056 mag, 075, 026, lewis winch

Offline Timbercruiser

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Re: 353 detroit valve adjustment
« Reply #2 on: April 29, 2013, 07:49:03 PM »
Thanks alot

Offline bushmechanic

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Re: 353 detroit valve adjustment
« Reply #3 on: April 30, 2013, 08:33:43 PM »
You may as well adjust the injector height as this is also part of the tune-up for the 353.The height tool is 1.460 on a N45 or N50 injector.

Offline Timbercruiser

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Re: 353 detroit valve adjustment
« Reply #4 on: May 01, 2013, 08:06:53 AM »
You may as well adjust the injector height as this is also part of the tune-up for the 353.The height tool is 1.460 on a N45 or N50 injector.

Thanks alot how often do they recomend tuning this stuff ?

Offline Kamlander

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Re: 353 detroit valve adjustment
« Reply #5 on: October 07, 2018, 09:27:21 PM »
Timbercruiser did you end up doing that valve maintenance ?   My 3-53 in my 78’ 230 doesn’t start that well cold but when warm fires right up.    Reminds me of symptoms of valve adjustment and upon searching I came across this thread.    


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