johnvica

I have spent a few $$$$ on a 5k setup and now I have noticed that the block has vertical cracks in a few of the bores. Can I resleeve the bores? Is it worth it? Anyone know where I can do it (sydney). Any other info I should know.. Cheers

Ordered the 2mm copper gasket, see how that goes.

Pistons are still in the block. Prefer not to touch the block if I can, but thanks. I'll think about that 2mm copper gasket, thanks. I've got my hands on a 3k head (apparently its a big port - will need to confirm the welse plug othe rear of it). Would this head suit? I guess I will need to do the same tests on it.

ok soo.. current comp is 12.65:1. Head has 20.6cc, does anyone know what is standard? Apparetly it has been shaved to the sht house.. Standard gasket won't last with that comp as seen. and can't get a multilayer steel gasket for the 5k. .8mm shim would reduce it to 11.3:1 which they are not advising but not totally against.. 1.5mm which are out of stock will get 10.35:1 which would be safer but again they do not really advise of shims at all. Looks like 4k or 3K head to get me out of this one..

I'll let you know what the engine builder says. I dropped it of this morning, so hopefully he gets back to me by this afternoon. He said just by looking at it, the head has been shaved alot. He will work it out and also the difference with the 1.5mm spacer that can be put on. Note taken 2 gaskets = twice the chance of failure. So whats your opinion with the 1.5mm spacer? Other way out is 3 or 4K head? or increase the voloume in this head to suit. I will look at the difference between static and dynamic, thanks.

Thanks for all that Now what comp ratio is desired? Based on my measurements I'm getting around 13.9 : 1... Bore: 81 stroke: 74 and 21cc for the head plus adding for gasket and dish in piston I am taking the head to an engine builder so he will confirm. But I will get him to work out what I need to lower the comp with a figure i give him. Just need to know what I should be aiming for?

Does any1 know where I can get a spacer for the head?

Yes the motor has been basically just put together without any engineering or advice such as from this forum. BACKGROUND: My bros car and he has taken it to a mate to put it together, so big bro here to help.. I know it has a big cam in it. 1st time it was put together the timing chain was put on wrong hence the bent vavles. Now with the head gasket blowing, apparentlly it over heated on the first run out. Based on what I have read above, the set up doesn't seem great due to high CR given the "flattish" pistons?? But a big cam might get me out of trouble. ummmm, issues with a high CR is blown gaskets, less power? is that right? How can you check compression ratios? I might put it back together and see how I go given the overheating when it was first taken out. Now with the head gasket, point taken with openings not lining up with no water jackets, but if there is no opening on the gasket where water jackets line up, what can you do to the gasket? just put an opening in it or would this stuff up the gasket?

Thanks for the response. the motor was - is running.. Just got a blown head gasketnow. The first time it was put together wrong (timing) hence the markings on the piston. I note the water jackets - thatnks. Just with the head gasket, should all the holes be all there or only a portion of them as like the one I pulled off it. I will post it on the above link.

I need help. I am putting together this 5K which I have been told the head is also from a 5K. The motor and head have had work done to it. I don't know alot hence I have put pics that can be seen on the below web page. On he piston it has .40 on it. I assume bored 40thou over. Can anyone tell me by looking at what I have, WHAT I HAVE? (I know stupid question..) Also the motor has also been striped a few times since being built- 1st time bent rods hence vale marks on the pistons. 2nd time (now) blown head gasket. Looking at the head and block I note that the water ports don't all line up, I think there are 3 (2 in the front of the block and I think the other in the rear). Is this normal? Also with the head gasket, all the water ports did not have openings on it. I would assume/thought that the head gasket would come with all the required cut outs (holes) in the gasket - not just a portion of them? I have another issue on the car (KE20) the gearbox (5 speed) on the back of the 5k.. I have no clutch pedal. The clutch kit and flywheel were taken to were I bought the clutch and apparently thats all sweet, there is basically a big gap between the throw bearing and pressure plate (fingers). I did attempt to unscrew the pivot bearing on the folk and it did work abit, but want to do it right. Any thoughts here as well. Thanks everyone for reading any help is greatly appreciated.