Compression gage
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Post Fiend
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From: Charles Town, W bygod Va
Compression gage
Anyone know of a cheap compression gauge that fits our trucks? I keep hearing how the harbor freight one doesnt fit. Has anyone made an adapter out of an old glow plug? Anyone know what size threads are on the gp's? Im guessing 7/16 fine thread.
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I have heard someone tried the harbor freight "cheap" kit and none of the attatchments fitl.
They returned it and got the more "expensive" set and it worked fine.
Like most people say i wouldn't trust it in a shop but for our uses which is most likely once in a blue moon, i imagine it would work fine, i plan on doing it to mine soon if i don't just use one at work.
Would give you a close ballpark estimate anyhow if those guages go high enough
They returned it and got the more "expensive" set and it worked fine.
Like most people say i wouldn't trust it in a shop but for our uses which is most likely once in a blue moon, i imagine it would work fine, i plan on doing it to mine soon if i don't just use one at work.
Would give you a close ballpark estimate anyhow if those guages go high enough
Logistics Pro
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I have just verified the HF $30 kit does NOT work on an IDI:
https://www.ford-trucks.com/forums/1...l#post13069585
Have yet to get the more expensive one, will report back when I do.
https://www.ford-trucks.com/forums/1...l#post13069585
Have yet to get the more expensive one, will report back when I do.
Logistics Pro
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Logistics Pro
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No, those misfiring cylinders, 1 & 3, have no measurable compression. The other 6 are between 390-400.
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you could also test it by pushing compressed air into one of those cylinders and feeling for the air with your finger over the other cylinder's glow plug hole.
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try putting the glow plug back into #1 for testing #3, and then do the opposite. it may be that the head gasket blew between those 2 cylinders and may give a little compression to confirm the suspicion.
you could also test it by pushing compressed air into one of those cylinders and feeling for the air with your finger over the other cylinder's glow plug hole.
you could also test it by pushing compressed air into one of those cylinders and feeling for the air with your finger over the other cylinder's glow plug hole.
Ah, good idea, I'll do that!
Posting Guru
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From: Oregon
I just posted on the other 'Compression Test' thread, but I'll throw the link up here as well. I bought this kit, and it works awesomely. Same kit that Matco slaps their name on and sells for a fortune.
STAR TU-15-53 Diesel Compression kit.
Star Products TU-15-53 Compression Tester - Compression / Press Test
STAR TU-15-53 Diesel Compression kit.
Star Products TU-15-53 Compression Tester - Compression / Press Test
Logistics Pro
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try putting the glow plug back into #1 for testing #3, and then do the opposite. it may be that the head gasket blew between those 2 cylinders and may give a little compression to confirm the suspicion.
you could also test it by pushing compressed air into one of those cylinders and feeling for the air with your finger over the other cylinder's glow plug hole.
you could also test it by pushing compressed air into one of those cylinders and feeling for the air with your finger over the other cylinder's glow plug hole.
Well, not so lucky, I tested both holes with a GP in the other, both cylinders still do not register compression.
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Post Fiend
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From: Charles Town, W bygod Va
...or put air pressure in through the comp tester at tdc and see where the air comes out.
Logistics Pro
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I'll probably do that just to satisfy my curiosity, but I'm going to have to pull the other head anyway and see if the rest of this GP is sitting on the #8 piston:
https://www.ford-trucks.com/forums/1...l#post13091267
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I just tried that trick, pulled the valve cover, got #1 to TDC, blew air into the GP hole, air comes out the intake. Checked to see if any of the air was coming out of GP hole #2, but NADA, it's all out of the intake.
Repeat on #2, same results. Sounds like I go some junk valves.
Repeat on #2, same results. Sounds like I go some junk valves.