351m/400 valve train
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Joined: Feb 2006
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351m/400 valve train
I have a real problem with two issues. one the number 3 intake valve sticks open on my 351m/400 causing a constant ticking noise and rough idle is there anyway to clean the "varnish" off the stem? two does anybody have vacuum diagram for this engine (1978 F150, 4x4, a/c, manual, no smog pump)
Lantz
Lantz
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Welcome to the site Jon,
Ticking !
Sometimes a condition called *Exhaust pop* can replicate valve ticking.
This condition is caused by a slight leak between the head & the exhaust manifold.
Valve ticking:
Put some STP, Bardahl,etc *Upper Cylinder lubricant* in the gasoline to help remedy this problem.
If you have the calibration code for your engine (white sticker on right bank valve cover) you can find your diagram here.
http://www.autozone.com/servlet/UiBr...3d800ce605.jsp
Ticking !
Sometimes a condition called *Exhaust pop* can replicate valve ticking.
This condition is caused by a slight leak between the head & the exhaust manifold.
Valve ticking:
Put some STP, Bardahl,etc *Upper Cylinder lubricant* in the gasoline to help remedy this problem.
If you have the calibration code for your engine (white sticker on right bank valve cover) you can find your diagram here.
http://www.autozone.com/servlet/UiBr...3d800ce605.jsp
