blueprintbullet Donating Members 163 Member For: 16y 10m 17d Gender: Male Location: Wanneroo Posted 05/08/13 08:35 AM Author Share Posted 05/08/13 08:35 AM I thought the same but from what I have been recently told by the Forman of another ford dealership when warranty work is done on a falcon the info and or pics must be sent to ford Australia as it is an Aussie built car, from there ford will give instruction as to what to repair/ replace if this isn't done then they don't get paid so I guess my frustration at nuford is somewhat unjustified Link to comment Share on other sites More sharing options...
will-82 Member 427 Member For: 20y 4d Location: sydney Posted 11/08/13 09:57 AM Share Posted 11/08/13 09:57 AM (edited) I agree if there was any loss of compression it would likely run poor, but the bend in these valves is only slight and the spring weight alone has been bending them shut finally resulting in the catastrophic failure.not necessarily, I had 2 bent valves in my rb26 and it went for years like idled fine and drove fine. A compression test showed that cylinder being down 15psi compared to the others, but the problem was not rectified till the head was removed due to going to an rb30 bottom end Edited 11/08/13 09:57 AM by will-82 Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 24d Gender: Male Location: @ my laptop Posted 11/08/13 11:08 AM Share Posted 11/08/13 11:08 AM a bent valve will not seat and cause major loss of compression, being down 15 psi is not normally a bent valve. Link to comment Share on other sites More sharing options...
will-82 Member 427 Member For: 20y 4d Location: sydney Posted 11/08/13 08:58 PM Share Posted 11/08/13 08:58 PM A valve doesn't need to be on a 45 degree angle to be classed as bent, but once you try to face the valves they will show up having a bend in them Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 24d Gender: Male Location: @ my laptop Posted 11/08/13 10:41 PM Share Posted 11/08/13 10:41 PM any bend will not allow it to seat 100% on it's seat Link to comment Share on other sites More sharing options...
blueprintbullet Donating Members 163 Member For: 16y 10m 17d Gender: Male Location: Wanneroo Posted 12/08/13 06:03 AM Author Share Posted 12/08/13 06:03 AM Another point is that when they did the compression check they would have all been down as the valves are all bent generally you are looking for the difference in results Link to comment Share on other sites More sharing options...
blueprintbullet Donating Members 163 Member For: 16y 10m 17d Gender: Male Location: Wanneroo Posted 14/08/13 09:55 AM Author Share Posted 14/08/13 09:55 AM Spoke to ford HQ yesterday still no report from Nuford so I made a report giving them all the relevent info and pics. They got back to me today and were fairly helpful but have said that they will only warrant manufacture issues and this is a workmanship issue which I will have to take up with Nuford. I questioned them in regards to if the chain guide replacement was repaired to there standards and they said that the repair would have been authorised by them but they would have only been able to go on the info from the Nuford mechanic and they need to warrant there own work.I also got hold of the report that was made when the guide failed and it mentioned that the timing was out by 2 teeth on both cams but no mention as to weather it was two teeth advanced or retarded. I know many have said that they have seen them retarded even further with no damage but if they were advanced the intake valves will be more likely to contact the pistons. As far as I know the intake valves start to open just prior to the piston hitting the TDC so if they opened earlier then the valves could be nearly all the way opened by the time the piston hits TDC.I'm sure there is some camshaft guru out there that can validate what I am saying? Link to comment Share on other sites More sharing options...
dustyae86 Member 46 Member For: 13y 3m 14d Posted 14/08/13 10:35 AM Share Posted 14/08/13 10:35 AM No disrespect inteneded to some of the other people on here, but I'm 100% with ratter on this one, when an engine is built the valves are seated to form a SEAL on the head, if like has been stated the valves were bent in the past it would be very noticeable, generally when a valve hits a piston it will generally break a bit off the head of the valve or else bend the shaft not allowing the valve to retract properly and then causing it to break the head off, this wouldn't happen years later, it would happen minutes later.Also regarding cars jumping teeth, it was my car that jumped 2 teeth and sounded absolutely horrible!! but in my opinion also it is exactly what was stated that causes it, sudden jumping off of the throttle, when mine did it, I had just came out of around about and accelerated in second then made alast minute decision to get red rooster and jumped off the throttle quickly at around 4000rpm. so the theory is, that the sudden jump makes the tensioner retract back but it still has quiet a bit of mechanical force on the engine then bam jumped teeth. Is there a fix? I honestly don't think so, just driving style I think, until someone releases a slightly stronger tensioner (which could cause it's own issues) my chain guide didn't really have any big chunks out of it, but it was a case of better safe than sorry.So there is my rant, so in the opinion of 2 qualified mechanics saying it wasn't due to the timing issue it's not looking great sorry to say 1 Link to comment Share on other sites More sharing options...
blueprintbullet Donating Members 163 Member For: 16y 10m 17d Gender: Male Location: Wanneroo Posted 14/08/13 10:52 AM Author Share Posted 14/08/13 10:52 AM (edited) I too don't want to upset anyone as you have all been helpful but I have the proof " these valves are bent" they also have a funny wear pattern on the stem as though they have worn on one side add to this when you press the valve back into the seat with your hand it sticks there because it has cocked itself into place, plus what would you expect to have happened to these valves as they have obviously hit the pistons Edited 14/08/13 10:59 AM by blueprintbullet Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 7m 20d Gender: Male Location: Adelaide Posted 14/08/13 11:10 AM Share Posted 14/08/13 11:10 AM Flogging a dead horse mate, hand in pocket and move on be lucky it lasted the 220 odd kms it did Mass produced and turbo Its done well Link to comment Share on other sites More sharing options...
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