Dottore Posted January 14, 2018 Share Posted January 14, 2018 (edited) Čitam https://jalopnik.com/did-ford-install-the-wrong-head-gaskets-on-the-focus-rs-1821665968?utm_campaign=socialflow_jalopnik_facebook&utm_source=jalopnik_facebook&utm_medium=socialflow Edited January 14, 2018 by Dottore Link to comment Share on other sites More sharing options...
2fast Posted January 14, 2018 Share Posted January 14, 2018 Naletio sam na neki članak ovih dana. Navodno je problem u brtvi glave sa motora koji je u Mustangu i postoji razlika u jednom kanalu koji bi trebao biti zatvoren kod Focusa. Zvuči mi nevjerojatno da bi si to jedan proizvođač poput Forda mogao dopustiti, no svašta se događa. Kao da su rekli da su stavili ležajeve radilice sa Fieste 1.0 EcoBoost... 1 Link to comment Share on other sites More sharing options...
13DM Posted January 14, 2018 Share Posted January 14, 2018 (edited) Ocito da je neki ing. malo Zajebo To se kod starijih motora znalo radit, kod novih takva stvar bas i nemre fercerat dugorocno A lezajevi se konkretno jako cesto po dimenzijama koriste od slabijih modela, ovisi o motoru i proracunu... Povecaju malo hod, stave bolji materijal lezajeva i to je to, mjere budu iste.. Onda ekipa slozi motor s jeftinim lezajevima, nekad ide a nekad i ne Ionako uljni film radi svoje ak bas niste skroz pehista Da ne nabrajam koliko ih se poklapa po dimenzijama a kataloski budu ovisno koja mora bit kutija i krajnja cijena... Edited January 14, 2018 by 13DM Link to comment Share on other sites More sharing options...
ND4SPD Posted January 14, 2018 Share Posted January 14, 2018 Poznata stvar, pogresan dizajn, prvenstveno dihtunga (od nedavno su ga promijenili) i bloka... Focus RS Head Gasket Failure Mechanism A lot has been made of the Focus RS Ecoboost 2.3 head gasket failures. It seems to be an issue that has occurred in both modified and unmodified vehicles. I am not certain what percentage of vehicles are affected. However we have spent significant time looking at the mechanics of the failure and wanted to share this with our customers and community. The Focus RS uses a multi layer steel (MLS) head gasket. This is a very capable method for sealing the block to head interface. This multilayer gasket is enhanced by an elastomer that further helps seal critical areas. The Focus RS 2.3 Ecoboost engine block is an open deck design. This means that the cylinders are not attached to the outside of the block structure at the sealing surface of the head gasket. This space is filled with engine coolant. The head and block are secured to each other using torque to yield bolts (which do not require re-torquing the head fasteners after the engine is heat cycled). In spite of this there is inevitable movement between the two sealing surfaces. The two types of movement are vertical movement (which is what causes head lift and a sudden gasket failure) as well as lateral movement. This lateral movement is of most interest in this situation. Minute lateral movement causes what is called gasket fretting/scrubbing. There are two mechanisms that cause this lateral movement: 1. Thermal deformation. As the engine is brought through a range of temperatures (within normal operation), the expansion and contraction of the head and block cause this lateral movement between the two interfaces. The movement caused by this is however low cycle, as the engine is warmed up and cooled down relatively few times compared to the next mechanism. 2. The most relevant mechanism for lateral movement is due to cylinder firing. When a cylinder fires, it applies pressure on the open deck cylinder structure. This in turn causes this minute movement between the two interfaces scrubbing them at a high rate. The result of this scrubbing is material loss from the head gasket, block, or head. Over time, the seal between the block and head can fail. The area where it will fail first is the area with: the highest movement, the highest contact pressure, and the least sealing material available. The area of highest lateral movement for the Focus RS is between the cylinders. The area of highest contact pressure is around the cylinders (because this is where the combustion pressure is highest and needs the best seal). This is by design. The area that will inevitably experience the highest wear rate will be between the cylinders. Manufacturing discrepancies, vehicle use, temperature fluctuations and other factors will influence whether a failure will occur on a vehicle and if so when. There are two methods to reduce this scrubbing wear. One is to stiffen the block structure. When rebuilding an engine for example, using the closed deck 2.0 Ecoboost block is an attractive option. However, Ford could not use this block in production and I am certain there are good reasons for this; likely related to emissions certification. The second method, and what is being implemented as a fix is to redesign the head gasket. Below is an image of a failed Focus RS gasket. A few things to note: There is a very high wear rate of the elastomer (black section) between the cylinders. This is where the gasket has failed. You can see that it is almost completely missing in these areas. Notice how thin the sealing area is between the cylinder overall. Looking carefully you will notice that the are two holes in gasket between the cylinders marked on the image below. Now let’s have a look at the block. You can see there is a very smallcoolant hole on the exhaust side. This hole lines up with one of the holes in the failed head gasket. You can also see a trail of coolant marking on the block surface leading to the second hole. This shows there is no elastomer between the cylinders on the original head gasket. Looking at the head, you can see that the first hole on the head gasket lines up with a coolant passage. The second hole, however does not line up with any coolant passage. Once again, the head shows that coolant was found in the area between the cylinders but this was a closed path. Overall the cylinder sealing area was very narrow and the head gasket failed after a number of miles. When the car was brought to the dealer, it was repaired with the head gasket shown below. There are some very important changes in the area between the two cylinders on the updated gasket. The second deadheaded hole is no longer present The entire area between the cylinders is now coated in elastomer. This will increase the sealing surface area and better distribute the clamping force in this critical area. This will in turn reduce the fretting/scrubbing failure of the head gasket. The latest gasket part number is G1FZ-6051-C and this is what dealers are replacing failed gaskets with on vehicles that experience this failure. I am not sure at what point the factory engines have received this latest gasket part number. The only indication I was given was that this part number was available to service centers sometime between 3/27/17 and 8/10/17. Again, this says nothing regarding when this change was made to vehicles coming out of the factory. I hope this clears up some of the confusion around these head gasket failures and what is causing them. The symptoms of failure are: Loss of coolant. Misfires, especially on a cold start and rough running. Coolant fouled/wet spark plugs. If you experience these symptoms, take the car in to Ford for the fix. Otherwise, enjoy the RS! It is not the only car in history to experience difficulties with head to block sealing. High output, low emissions, small displacement engines like the RS are a challenge to engineer and can have some teething issues; but at the same time we can all agree that fun behind the wheel was certainly well engineered! http://stratifiedauto.com/blog/focus-rs-head-gasket-failure-mechanism/ Uz taj dio, zanimljivo je vidjeti u kojem se sve slucaju ne priznaje garancija: https://ford.oemdtc.com/GSB/G0000128.pdf Uz sve to, vec sada straznji GKN Twinster LSD zovu - "glass diff"... 1 Link to comment Share on other sites More sharing options...
ND4SPD Posted January 14, 2018 Share Posted January 14, 2018 Sorry @Dottore nisam ni otvarao link, sad tek vidim da su u linku iste slike koje sam stavio 2 Link to comment Share on other sites More sharing options...
Fredy Posted January 14, 2018 Share Posted January 14, 2018 Sad kad semper krene u biznis, nekom smrkne drugom svane 2 Link to comment Share on other sites More sharing options...
Dottore Posted January 14, 2018 Author Share Posted January 14, 2018 2 hours ago, ND4SPD said: Sorry @Dottore nisam ni otvarao link, sad tek vidim da su u linku iste slike koje sam stavio Nemaš brige, ne opraštam ti Link to comment Share on other sites More sharing options...
robert Posted January 14, 2018 Share Posted January 14, 2018 Pa fascinantno je naprave performance motor i ne naprave sa njime neki jebeni kilometar prije nego ga puste u prodaju. Mislim da ce I30N nakraju biti peri deri neunistiv hot hach Nakon starog ST a i RS a na sta je ford spao Link to comment Share on other sites More sharing options...
Kic Posted January 14, 2018 Share Posted January 14, 2018 Požuren razvoj/lansiranje na tržište? Previse snage za open deck? Loša brtva? Navodno su i tokom razvoja imali problem sa motorima: https://youtu.be/HhYUUDjDq1E?t=26m54s Link to comment Share on other sites More sharing options...
robert Posted January 14, 2018 Share Posted January 14, 2018 4 minutes ago, Kic said: Požuren razvoj/lansiranje na tržište? Previse snage za open deck? Loša brtva? Navodno su i tokom razvoja imali problem sa motorima: https://youtu.be/HhYUUDjDq1E?t=26m54s Mogli su staviti starog petaka iz RS a mk2 rijesiti eko norme, nasvirati ga na 400 ks i nece se raspast nikada Link to comment Share on other sites More sharing options...
semper Posted January 15, 2018 Share Posted January 15, 2018 Sad kad semper krene u biznis, nekom smrkne drugom svane Ma di sam ja od rs-a, nemrem ga ni nacrtat Ali ovo sto robert kaze, trebali su petaka smanjit na 2.3 i stavit 100 katalizatora Link to comment Share on other sites More sharing options...
dcrnic Posted January 15, 2018 Share Posted January 15, 2018 Ovo je bilo na fejsu od ovih tu iz grada sto prodaju forda... nakon zadnjeg komentara naravno izbrisali cijelu pricu... ali lik je uspio roknuti print screen... hahaha 1 Link to comment Share on other sites More sharing options...
Garet Posted January 15, 2018 Share Posted January 15, 2018 Navodno je i razlika u stijenkama blokova...V4 je stari model V5 novi koilko sam uspijeo saznati...jos uvijek se prodaju sa V4,,,, Link to comment Share on other sites More sharing options...
robert Posted January 15, 2018 Share Posted January 15, 2018 4 minutes ago, Garet said: Navodno je i razlika u stijenkama blokova...V4 je stari model V5 novi koilko sam uspijeo saznati...jos uvijek se prodaju sa V4,,,, Narucuj ???? Link to comment Share on other sites More sharing options...
Garet Posted January 15, 2018 Share Posted January 15, 2018 1 hour ago, robert said: Narucuj ???? Neka se prvo ispucaju sa tim starim modelima...imam vec jednog sa tim simptomima... 1 1 Link to comment Share on other sites More sharing options...
semper Posted January 15, 2018 Share Posted January 15, 2018 Neka se prvo ispucaju sa tim starim modelima...imam vec jednog sa tim simptomima...Jel krama na prodaju? Link to comment Share on other sites More sharing options...
Garet Posted January 16, 2018 Share Posted January 16, 2018 19 hours ago, semper said: 20 hours ago, Garet said: Neka se prvo ispucaju sa tim starim modelima...imam vec jednog sa tim simptomima... Jel krama na prodaju? Nasmijao si me do suza,svaki puta kad nesto napises...stvarno..skoro otisla prosle godine ,,covjek kupio jos skupljega :).. 1 Link to comment Share on other sites More sharing options...
semper Posted January 16, 2018 Share Posted January 16, 2018 Nasmijao si me do suza,svaki puta kad nesto napises...stvarno..skoro otisla prosle godine ,,covjek kupio jos skupljega ..Daj neku cifru, taman sam u procesu kupnje normalnog auta, pa je vrijeme za pogresku Link to comment Share on other sites More sharing options...
francuz Posted January 19, 2018 Share Posted January 19, 2018 Ako netko prodaje Ford RS 2.5T neka mi se javi na privat. Link to comment Share on other sites More sharing options...
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