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Engine Valvetrain Calibration

  • Thread starter Thread starter PonyGTrider
  • Start date Start date Jun 12, 2025

PonyGTrider

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#1
  • Jun 12, 2025
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Hi all,
Have any of you used this valve calibration method before? According to this manual this is for a 5.0 HO, can this be used on a TFS stage 1 cam?

Thank you
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
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#2
  • Jun 12, 2025
  • #2
Yeah, after 10 minutes I was confused and started over, another 10 minutes and I needed to throw something, but I didn't, I then verified TDC in the firing order adjusted the valves and remains to be tested. Pedestal rocker by the way.
 
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PonyGTrider

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General karthief said:
Yeah, after 10 minutes I was confused and started over, another 10 minutes and I needed to throw something, but I didn't, I then verified TDC in the firing order adjusted the valves and remains to be tested. Pedestal rocker by the way.
Click to expand...
Oh I see, I was just curious to know if anyone have done that sequence and the results, and if it would work on a cam like mine TFS stage 1. I have 1.6 adjustable rockers on 7/16 studs.
Please share your results if you can

Thank you
 
R

Rcdgl

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Just a heads up, but my print manual for my 79 Capri has an incorrect sequence for adjusting the valves on a 302. Easiest is to just go through the firing order and adjust.
 
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PonyGTrider

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Rcdgl said:
Just a heads up, but my print manual for my 79 Capri has an incorrect sequence for adjusting the valves on a 302. Easiest is to just go through the firing order and adjust.
Click to expand...
Oh, that’s the way I calibrated mine but some argue that hat’s not the right way to do it. The way I did it was after I found number 1 cylinder at TDC I calibrated In/ex then I brought the next cylinder in order (No. 3) to TDC and repeated the same with the rest of the cylinders. Maybe I will try that sequence next time I’m at it
Thanks man
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
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#6
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My opinion (read disclaimer) is the important thing is the cylinder you're working on is at TDC on the compression stroke.
DISCLAIMER: advice/opinion is not based on any real automotive training.
i just post like I know stuff...
mostly useless stuff....
 
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limp

wrap a little cheese around it and its a done
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The best way " in my opinion" is to do one cylinder at a time.. Takes longer but you know its done correctly
Adjust the intake as " the exhaust starts to open"
Adjust the Exhaust " as the intake starts to close" ......
 
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PonyGTrider

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limp said:
The best way " in my opinion" is to do one cylinder at a time.. Takes longer but you know its done correctly
Adjust the intake as " the exhaust starts to open"
Adjust the Exhaust " as the intake starts to close" ......
Click to expand...
I did my valves that way but didn’t apply your last two paragraphs. I simply followed the firing order bringing each cylinder to TDC and adjust both valves. Next time I will follow your suggestions.

Thank you
 
Last edited: Jun 19, 2025
F

Flyboy60

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#9
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  • #9
PonyGTrider said:
I did my valves that way but didn’t apply your last two paragraphs. I simply followed the firing order bringing each cylinder to TDC and adjust both valves. Next time I will follow your suggestions.

Thank you
Click to expand...
SO what you are saying is that at TDC on the compression stroke for whatever cylinder you are working on, you can adjust both the exhaust and intake valves?
 
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AeroCoupe

lube between the nut and the face. I know my lubes
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That is not the way to do it. You need to have the cam lob on its base circle to ensure there is no lift.
 
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PonyGTrider

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Flyboy60 said:
SO what you are saying is that at TDC on the compression stroke for whatever cylinder you are working on, you can adjust both the exhaust and intake valves?
Click to expand...
That’s the way many of us do it. Since hydraulic lifters calibration is so wide it may not have that much of impact. Solid lifters could be a different animal because there is not forgiven.
In my post I posted one way some books suggest, and hopping people chip in with the most accurate way to do it.
 

AeroCoupe

lube between the nut and the face. I know my lubes
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What is the best way to adjust my lifters?

The easiest way to explain this is to take it in three sections; engine position to proper adjustment, hydraulic lifter adjustment and mechanical lifter adjustment. These instructions will work on flat or roller lifter engines. Also if this is a new engine or a cam change where the intake...
scorpionracingproducts.com
 
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PonyGTrider

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#13
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For those interested I’ve found this fool/Distraction proof method of valves adjusting. I might try it next time o open my valvetrain but i will first bleed all the lifters as suggested in the video.

View: https://youtu.be/5EGlb_VpTAw?si=ZJpGfFgVCLInv_si
 
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M

Monkeybutt2000

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#14
  • Jul 13, 2025
  • #14
PonyGTrider said:
For those interested I’ve found this fool/Distraction proof method of valves adjusting. I might try it next time o open my valvetrain but i will first bleed all the lifters as suggested in the video.

View: https://youtu.be/5EGlb_VpTAw?si=ZJpGfFgVCLInv_si
Click to expand...
I tried that method 5-6yrs back,IDK what I did wrong but it did not work for me. Twice The best way IMO is EOIC in the ciring order.
 
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PonyGTrider

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Monkeybutt2000 said:
I tried that method 5-6yrs back,IDK what I did wrong but it did not work for me. Twice The best way IMO is EOIC in the ciring order.
Click to expand...
Oh, in theory it work perfectly fine. Having the lifters completely bled, getting zero lash on all the lifters and rotating the crank 90 deg after zero lash eight times or more and then apply the desired pre-load locking all the poly locks, sounds easy and error proof. Definetely I’ll try it.

Thank you
 
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