KingK_series Posted May 16, 2012 Posted May 16, 2012 From the oil thread Martin PTP will sell you decent OEM spec spun liners,and they are not expensive you will need to deck the block and the liner shoulders. that's the cheap OEM way to do it, improving on that which is all about longevity and sorting the "HGF" issue costs money, you are welcome to pm me on that subject, - I am keeping an explanation for the book -
Martin R Posted May 16, 2012 Posted May 16, 2012 Simon, thanks for that. Im not a rich man, however if there is a better solution that is a bit more expensive im all ears. I believe there is now a ductile liner that is better at resisting ovalisation ? They are apparently also better when new ? Apparently some of the others are not in spec to start with ?
KingK_series Posted May 16, 2012 Author Posted May 16, 2012 Simon, thanks for that. Im not a rich man, however if there is a better solution that is a bit more expensive im all ears. I believe there is now a ductile liner that is better at resisting ovalisation ? Where did you here that? am a bit puzzled by that .... ductile = more flexible, so is this being done on the basis that if a liner is flexible and you pound it out of shape as the piston rises in the bore it's actually all ok? because the liner returns to round as the piston descends? Bit worried about that - because if it's out of round you will be using oil [bad], the heat transfer will reduce [bad] because you are losing ring bore contact and you are doing work ie losing efficiency moving the liner wall about. seems very dodgy thinking to me - as if round bores are a good thing but only intermittently - do you want a set of steel liners? - 3 times the hoop strength of cast iron.
Martin R Posted May 16, 2012 Posted May 16, 2012 Steel liners is probably what i was thinking. Im just interested in the best liner for my rebuild ?
KingK_series Posted May 16, 2012 Author Posted May 16, 2012 Steel liners is probably what i was thinking. Im just interested in the best liner for my rebuild ? pm me
fentuz Posted May 18, 2012 Posted May 18, 2012 Martin, are you still looking at a 1.9 k vhpd k series? You might be interested in this http://www.evo.co.uk/news/evonews/37079/tuners_blamed_for_kseries_failures.html
Steve J Posted May 18, 2012 Posted May 18, 2012 Martin, are you still looking at a 1.9 k vhpd k series? You might be interested in this http://www.evo.co.uk...s_failures.html I wonder where that came from? We all know there are fundametal issues with the execution of the K-series design, blaming unreliability (usually HGF) upon tuners is wholey missing the failure rate of non-tuned engines fitted to Rover cars.
KingK_series Posted May 18, 2012 Author Posted May 18, 2012 I wonder where that came from? We all know there are fundametal issues with the execution of the K-series design, blaming unreliability (usually HGF) upon tuners is wholey missing the failure rate of non-tuned engines fitted to Rover cars. - but the factory didn't make a mess of machining out these aftermarket piston valve pockets thus..... Why I don't like [what gets done to] the Rover K series and causing the valves to get bent or sell trimetal bearings in one grade and fit them to undersize aftermarket cranks or CBA to fit bleeder nipples on aftermarket TBs or botch the honining of 82mm bores for an aftermarket 1.9L etc etc etc etc etc etc etc etc etc etc etc
Martin R Posted May 18, 2012 Posted May 18, 2012 No need for a bun fight on this The K series built well is IMO a fantastic engine. However it developed a bad reputation because it kept letting people down in whatever form tuned or not. I have just got a brand new standard head. The amount of flashing left in the head waterways is terrible. They left the factory with liner heights all over the place etc etc. Im one of the biggest fans however you cant be blind to the shortcomings. These can be rectified with care though.
KingK_series Posted May 18, 2012 Author Posted May 18, 2012 No need for a bun fight on this The K series built well is IMO a fantastic engine. However it developed a bad reputation because it kept letting people down in whatever form tuned or not. I have just got a brand new standard head. The amount of flashing left in the head waterways is terrible. They left the factory with liner heights all over the place etc etc. Im one of the biggest fans however you cant be blind to the shortcomings. These can be rectified with care though. there is flash from any casting - including honda k20s, in fact every production engine has shortcomings which is why I wrote this on SE, - Why don't I like Honda K20's to show that K is not alone with issues, and many engines lose their cylinder seal - including one K20A2 I have here which did 1 lap in 2007 Lot before the gasket let go...
Martin R Posted May 18, 2012 Posted May 18, 2012 Simon, of course there is flash from any casting. However as you yourself say good cooling is vital on a K series, especially i imagine around the head. Surely removing it would have been a reasonable production method before bolting it on top of an engine ? Its things like this that led to premature failure and the bad reputation.
KingK_series Posted May 18, 2012 Author Posted May 18, 2012 Simon, of course there is flash from any casting. However as you yourself say good cooling is vital on a K series, especially i imagine around the head. Surely removing it would have been a reasonable production method before bolting it on top of an engine ? Its things like this that led to premature failure and the bad reputation. Yes absolutely and the ero 4 heads were machined out through those waterways, but the problem is the waterflow though the block and head interface. - too much at one end, too little elsewhere, and it is/was a typical problem for most engine before effective FEA analysis became available, made worse on K just because it is such a light block. - however to add to the point taking away that flash is helpful at the hotspot, but increases flow and makes the problem worse at the cold end - so there it is a mistake to take out the flash - see early post.....Why I don't like [what gets done to] the Rover K series and
Martin R Posted May 18, 2012 Posted May 18, 2012 Interesting a couple of pics as i dont have to go to work till later. Sorry about the quality but you can see enough. This cant be good ? Another one. Compared to this
KingK_series Posted May 18, 2012 Author Posted May 18, 2012 Interesting a couple of pics as i dont have to go to work till later. Sorry about the quality but you can see enough. This cant be good ? Another one. Compared to this in part it is not, but in part it is.......... the trick is to get more flow where the head gets hot, and to leave the flow where it is relatively too cool - see pic on SE wheread where DVA hacked out all the casting flash on Mark Bowles's head, - that makes the problem worse.
Martin R Posted May 18, 2012 Posted May 18, 2012 I presume the exhaust side needs more flow then ? Also the further you get away from the water pump the hotter it gets ?
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