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Post by Deleted on May 21, 2019 20:39:09 GMT 1
Hope some one can shed some light I have a 2012 rwd 2.2 euro 5 transit I can hear popping kind of noise from the intake manifold I have done a compression test I'm getting 480 psi across all 4 cylinders An engine code would help to confirm/dismiss your compression pressures as right or wrong. Many years ago I bought a brand new Sykes Pickavant compression test kit because I suspected a very old compression tester I had was giving me false readings of 50 psi per cylinder. The new Sykes compression tester told me that the cylinders compression's were 130 psi, and at that I looked elsewhere for the fault. I didn't find a fault so I gave the car to my mate who tested the compression's the following morning and rang me then telling me the cylinders only had 50 psi. My point if possible double check your cylinder compression's using another gauge. Back to your vehicle; The compression's you have recorded depending upon your engine code could be lower than the manufacturer recommends. (Sorry to other posters if this upsets anyone). If by example your engine code were [CVRA] and the engine were 114 kw then your CR would or should be 15.5:1 Using the formula; Pressure: P = Po x CR^y You can estimate your cylinder compression's reasonably accurately, thus; Po = Pressure of atmosphere, typically 1 bar CR = Compression ratio y = Specific heat ratio (this depends upon the fuel used) So as a guide; Pressure P = 1 x 15.5^1.4 = 46.4 bar (682) psi Two factors you need to consider; 1 = Diesel specific fuel heat ratio, and 2 = The specific engine code for your van. |
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Post by bowtay on May 22, 2019 10:15:23 GMT 1
Hi thanks for the replies the engine is a cr the reading we're done with the engine hot and running if I crank and do readings I get 380 psi accross the board I have removed exhaust still get same figures iv had the head off iv checked it and had it to a head specialist all good. the problem is I'm getting a weird noise in the cab on tick over its worst in passenger foot well its a b b b b b b b noise it runs a bit uneven. When driving you can here a kind of rumbling like big bore exhaust if you take the air filter pipe ofit sounds like the exhaust rather than a sucking noise iv checked live data to my pals van the only thing that stands out is my injection
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Post by bowtay on May 22, 2019 10:18:55 GMT 1
My injection learns arnt learn ie they are all reading nothing my pals van has numbers in. See pic of my data  |
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Post by remmington on May 22, 2019 10:20:09 GMT 1
Hope some one can shed some light I have a 2012 rwd 2.2 euro 5 transit I can hear popping kind of noise from the intake manifold I have done a compression test I'm getting 480 psi across all 4 cylinders An engine code would help to confirm/dismiss your compression pressures as right or wrong. Many years ago I bought a brand new Sykes Pickavant compression test kit because I suspected a very old compression tester I had was giving me false readings of 50 psi per cylinder. The new Sykes compression tester told me that the cylinders compression's were 130 psi, and at that I looked elsewhere for the fault. I didn't find a fault so I gave the car to my mate who tested the compression's the following morning and rang me then telling me the cylinders only had 50 psi. My point if possible double check your cylinder compression's using another gauge. Back to your vehicle; The compression's you have recorded depending upon your engine code could be lower than the manufacturer recommends. (Sorry to other posters if this upsets anyone). If by example your engine code were [CVRA] and the engine were 114 kw then your CR would or should be 15.5:1 Using the formula; Pressure: P = Po x CR^y You can estimate your cylinder compression's reasonably accurately, thus; Po = Pressure of atmosphere, typically 1 bar CR = Compression ratio y = Specific heat ratio (this depends upon the fuel used) So as a guide; Pressure P = 1 x 15.5^1.4 = 46.4 bar (682) psi Two factors you need to consider; 1 = Diesel specific fuel heat ratio, and 2 = The specific engine code for your van.
46.4bar (682psi) just seems silly high to me....!You need to understand - valve timing - degree overlap - reduces the calculated "dead end compression reading". |
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Post by bowtay on May 22, 2019 19:16:13 GMT 1
I have since done a compression test by cranking not running I'm getting 390psi across all 4 cylinders is this right for my 2012 transit 2.2 euro 5 engine code cr
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Post by remmington on May 22, 2019 19:44:34 GMT 1
I have since done a compression test by cranking not running I'm getting 390psi across all 4 cylinders is this right for my 2012 transit 2.2 euro 5 engine code cr 390psi / 14.4 = 27.08 bar To me 27 bar is healthy Ford transit diesel compression reading. I started this post with a misfiring transit engine - two duff injectors - then stripped it - to find - valve gear had broken - the upper alloy cam carrier was all broken - the one I tested had 17-19 bar - but that was enuf pressure to start OK and compression explode diesel fuel. |
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Post by Deleted on May 22, 2019 19:46:07 GMT 1
An engine code would help to confirm/dismiss your compression pressures as right or wrong. Many years ago I bought a brand new Sykes Pickavant compression test kit because I suspected a very old compression tester I had was giving me false readings of 50 psi per cylinder. The new Sykes compression tester told me that the cylinders compression's were 130 psi, and at that I looked elsewhere for the fault. I didn't find a fault so I gave the car to my mate who tested the compression's the following morning and rang me then telling me the cylinders only had 50 psi. My point if possible double check your cylinder compression's using another gauge. Back to your vehicle; The compression's you have recorded depending upon your engine code could be lower than the manufacturer recommends. (Sorry to other posters if this upsets anyone). If by example your engine code were [CVRA] and the engine were 114 kw then your CR would or should be 15.5:1Using the formula; Pressure: P = Po x CR^y You can estimate your cylinder compression's reasonably accurately, thus; Po = Pressure of atmosphere, typically 1 bar CR = Compression ratio y = Specific heat ratio (this depends upon the fuel used) So as a guide;Pressure P = 1 x 15.5^1.4 = 46.4 bar (682) psi Two factors you need to consider;1 = Diesel specific fuel heat ratio, and 2 = The specific engine code for your van.
46.4bar just seems silly high to me....!You need to understand - valve timing - degree overlap - reduces the calculated "dead end compression reading". I'm sorry if the information I have provided upsets you, but I think you should read my post again remmington and maybe think a little more about what I wrote. Your post comes across as though you are implying that I don't understand how or what affects compression ratios, but I can assure you I do understand valve timing - degree overlap etc, but I'm not sure at this time if you have completely misunderstood or misinterpreted the information I have posted. Do you know or understand how the vehicle manufacturer/designer concludes the compression ratio and thus the compression pressure of cylinders? I'm reasonably confident that they don't use a Bourdon gauge! The figures quoted are not mine or my research so unless the data has been printed wrong, the manufacturers data we must take as accurate unless there is evidence to the contrary to suggest their figures are not accurate surely! |
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Post by remmington on May 22, 2019 19:56:35 GMT 1
46.4bar just seems silly high to me....!You need to understand - valve timing - degree overlap - reduces the calculated "dead end compression reading". I'm sorry if the information I have provided upsets you, but I think you should read my post again remmington and maybe think a little more about what I wrote. Your post comes across as though you are implying that I don't understand how or what affects compression ratios, but I can assure you I do understand valve timing - degree overlap etc, but I'm not sure at this time if you have completely misunderstood or misinterpreted the information I have posted. Do you know or understand how the vehicle manufacturer/designer concludes the compression ratio and thus the compression pressure of cylinders? I'm reasonably confident that they don't use a Bourdon gauge! The figures quoted are not mine or my research so unless the data has been printed wrong, the manufacturers data we must take as accurate unless there is evidence to the contrary to suggest their figures are not accurate surely! Please read quote from a previous post on this thread by me: "17.5 : 1 ratio quoted To me should be 350psi or 24 bar on a new engine! (multiply ratio by 20 for new) Or 306psi or 21 bar on a old tired engine (multiply ratio by 15 for an old tired end of life engine that runs). Cam timing effects compression readings! Read more: carmechanics.proboards.com/thread/3450/mk7-transit-2-low-compression?page=2#ixzz5ogHNaoj4" And to be blunt - what we have here - is a sensible chap (bowtay) asking a sensible question - he is armed with a dial compression gauge and wants an answer. The nice chap is: Cranking the engine - operating the overhead valves and wants to know what his gauge should read for a healthy engine - it is a sensible question he is asking - it deserves a sensible answer. Gaurdian - your reply - however detailed it is - will not answer his question - it is not answering his question - you are not in fact offering him any help at all. |
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Post by Deleted on May 22, 2019 19:57:23 GMT 1
Hope some one can shed some light I have a 2012 rwd 2.2 euro 5 transit I can hear popping kind of noise from the intake manifold I have done a compression test I'm getting 480 psi across all 4 cylinders I have since done a compression test by cranking not running I'm getting 390psi across all 4 cylinders is this right for my 2012 transit 2.2 euro 5 engine code cr Something is very wrong with your engine code, Ford engine codes are 4 digits normally. |
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Post by Deleted on May 22, 2019 20:09:00 GMT 1
I'm sorry if the information I have provided upsets you, but I think you should read my post again remmington and maybe think a little more about what I wrote. Your post comes across as though you are implying that I don't understand how or what affects compression ratios, but I can assure you I do understand valve timing - degree overlap etc, but I'm not sure at this time if you have completely misunderstood or misinterpreted the information I have posted. Do you know or understand how the vehicle manufacturer/designer concludes the compression ratio and thus the compression pressure of cylinders? I'm reasonably confident that they don't use a Bourdon gauge! The figures quoted are not mine or my research so unless the data has been printed wrong, the manufacturers data we must take as accurate unless there is evidence to the contrary to suggest their figures are not accurate surely! Please read quote from a previous post on this thread by me: "17.5 : 1 ratio quoted To me should be 350psi or 24 bar on a new engine! (multiply ratio by 20 for new) Or 306psi or 21 bar on a old tired engine (multiply ratio by 15 for an old tired end of life engine that runs). Cam timing effects compression readings! Read more: carmechanics.proboards.com/thread/3450/mk7-transit-2-low-compression?page=2#ixzz5ogHNaoj4" And to be blunt - what we have here - is a sensible chap (bowtay) asking a sensible question - he is armed with a dial compression gauge and wants an answer. The nice chap is: Cranking the engine - operating the overhead valves and wants to know what his gauge should read for a healthy engine - it is a sensible question he is asking - it deserves a sensible answer. Gaurdian - your reply - however detailed it is - will not answer his question - it is not answering his question - you are not in fact offering him any help at all. I think it is a fair question when I ask for the correct engine code to his van and not use generalised information based on personal experiences or examples from other vans having been worked on. I'll have to agree to disagree with you on the fact that you say I am offering no help to bowtay at all. bowtay is in fact asking whether the compression pressures on his van, and not your van are actually correct, and what I am trying to establish is his engine code to gain factual information to advise him. Now if he can find the correct engine code which is normally on one of the door pillars he could then use the method I provided above to work out his own pressures, and then he would have his answer to his question. If you advise him that 17.5:1 in your opinion is correct for his van but the manufacturer says its something entirely different, then surely it is you that is providing incorrect information and are in fact misleading the man! |
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Post by remmington on May 22, 2019 20:10:26 GMT 1
Hope some one can shed some light I have a 2012 rwd 2.2 euro 5 transit I can hear popping kind of noise from the intake manifold I have done a compression test I'm getting 480 psi across all 4 cylinders I have since done a compression test by cranking not running I'm getting 390psi across all 4 cylinders is this right for my 2012 transit 2.2 euro 5 engine code cr Something is very wrong with your engine code, Ford engine codes are 4 digits normally.
I'm reasonably confident that they don't use a Bourdon gauge!
Read more: carmechanics.proboards.com/thread/3450/mk7-transit-2-low-compression?page=2#ixzz5ogM3KCDINo but car mechanics do - connected to bit of rubber pipe - to a purpose made adapter - threaded into a glowplug port. And when looking at said gauge - they want some idea what a healthy reading should be? |
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Post by bowtay on May 22, 2019 20:11:28 GMT 1
Where do I find the engine code
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Post by bowtay on May 22, 2019 20:14:35 GMT 1
I am still in the dark a straight answer would be good I have tried 2 compression testers I have a sp one myself k
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Post by Deleted on May 22, 2019 20:18:25 GMT 1
Something is very wrong with your engine code, Ford engine codes are 4 digits normally.
I'm reasonably confident that they don't use a Bourdon gauge!
Read more: carmechanics.proboards.com/thread/3450/mk7-transit-2-low-compression?page=2#ixzz5ogM3KCDINo but car mechanics do - connected to bit of rubber pipe - to a purpose made adapter - threaded into a glowplug port. And when looking at said gauge - they want some idea what a healthy reading should be? A bourdon gauge is a very good design, however used as a compression gauge will never tell or show the truth about the state of compression of any internal combustion engine, ever. Any person who suspects that a engine cylinder or cylinders have problems relating to compression issues and relies on a gauge to prove factual information are on a hiding to nothing. It has been proven time and time again by industry experts that the compression gauge cannot and will not prove correct cylinders compression fact. You will never prove whether the engine health is or should be using a gauge fact. Sorry if my information is upsetting you, but research from various methods of testing and research from other leading industry professionals opened my eyes to how poor the results of cylinder compression testing actually is when using a gauge to measure it. |
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Post by Deleted on May 22, 2019 20:19:49 GMT 1
Where do I find the engine code As I pointed out in my early post, on one of the door posts normally the passengers front B post. It will be four digits long like ABFA etc |
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