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Setting the timing on the 4.2L

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Old 06-14-2003, 07:18 PM
jgifford jgifford is offline
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Setting the timing on the 4.2L

I just bought a 97 F150 that was hammering like crazy, so I pulled the engine and found a bent rod and broken piston. Anyway, I'm trying to figure out everything so when it is time to put the motor back, I'll know what I am doing. So my first question is how do you set the timing? Any special tools required? Detailed explanations would be greatly appreciated. Thanks in Advanced.


Jeremy
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Old 06-15-2003, 01:24 PM
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Setting the timing on the 4.2L

Hi there,
what size engine is it?
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Old 06-15-2003, 01:30 PM
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Setting the timing on the 4.2L

Sorry, I guess I should have put said that earlier. It is a 4.2L.
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Old 06-15-2003, 01:32 PM
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Setting the timing on the 4.2L

I guess I should have also asked if it's ignition timing or cam timing you're wondering about
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Old 06-15-2003, 03:23 PM
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Setting the timing on the 4.2L

I'm not real sure, the only engines I've ever worked on were chevys. The thing is, I've got all everything pulled and out, and I just don't know if when it's time to put it all back together, do I just bolt everything up, or am I going to need to align something?
I'm assuming since you asked that I am going to have to set both, so I guess I need to know a little about both ignition and cam timing.
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Old 06-17-2003, 12:42 AM
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Setting the timing on the 4.2L

The cam timing gets set like this......
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Old 06-17-2003, 12:47 AM
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Setting the timing on the 4.2L

The camshaft synchronizer (looks like the bottom half of a distributor, has the camshaft position sensor on it) also has to be timed. You are supposed to have the special tool from Ford to line it up.
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Last edited by Racerguy; 06-17-2003 at 12:51 AM.
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Old 06-17-2003, 12:52 AM
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Setting the timing on the 4.2L

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Old 06-17-2003, 08:43 PM
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Setting the timing on the 4.2L

Racerguy,

Sorry about all the questions but, I went and looked through all the parts the Camshaft Position sensor and everything below is still installed on the front plate. Do I still need to use that special tool?
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Old 06-17-2003, 08:56 PM
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Setting the timing on the 4.2L

You will probably have to remove the synchronizer assembly to install the front cover. After that you'll have to adjust it.
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Old 07-02-2003, 02:22 PM
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Question Setting the timing on the 4.2L

Hey, Racerguy, when i set the camshaft position sensor like your diagram, does the engine have to be a TDC? I have a 97 4.2l engine.
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Old 07-02-2003, 08:26 PM
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Setting the timing on the 4.2L

I guess that's a kinda important little detail I left out....ooops.
Yes it has to be at TDC on the compression stroke on #1 cylinder.
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Old 10-30-2005, 04:38 PM
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where is the cam positioning sensor located on the engine?
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Old 10-31-2005, 01:08 AM
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Hi and welcome to the forum

The cam position sensor is located on the top of the snchronizer assembly at the front of the engine. It is where the distributor would be if it had one.
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Old 10-31-2005, 02:02 AM
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Thank you Greatly!!!! another question.....why would the cam. pos. sensor be completly destroyed on the inside and the snchronizer top ( that goes underneath the sensor) be broken in half?
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