Hard to see from the pics but did Cyl 1 and 4 crack the walls and lose the piston? or just the one and you just took two photos of it? Because you only lost one valve
*** How JDM am I ? ***
███████████████████ 120% ████
Shit...that's horrible mate. Crank's been chewed out as well as the rest of the block...8500-8600 is completely normal for that type of engine. There's no reason for the engine to let go unless the tune was bad, bad build or you held those revs...that and a combination of not servicing it by the looks of those pics
form the pic,cylinder 1 or 4 (i dont know,never seen a b16 this naked) has dropped a valve.
your options are:
1. spring has caused float and the valve has contacted the piston,smashed the valve and the debris in the cylinder has smashed your engine to bits.solution,upgraded springs
2: Because you were using stock retainers,at high rpm these 10gram or so retainers have to change direction thousands of times a minute and they're relative mass gets into the hundreds of kg's. The retainer could of simply had enough,left enough gap for the collets to escape,your valve got thrown into the piston....smash.solution,titanium or stainless retainers,lighter and stronger
3. At high rpm the valve is opening and closing alot,your stock valve may have had enough of the pounding against the port at high rpms and literally snapped the head off it,throwing your valve into the piston.....smash. souliton,titanium or stainless valves
im only an apprentice mechanic so im just trying to think through it logically,im interested to hear what others think.
like everyone has said,b16 can rev that high easy,stock springs and all,issues arise if you play around and hold those high rpm for excessive time.
goodluck with whatever your next engine is joe,maybe its time for a shift light lol
Last edited by teh_mechanic; 01-04-2008 at 07:22 PM.
Ha,ha
Yeh i was reving the shit out of it but i rev the crap out of all my cars, never had a problem. The hondata rev limit was set at 8500 -8600rpm. Type r valve springs would handle that easy.All that slime is the coolant mixed in with the oil LOL.
I have the remains of the valves one is snaped result from the collars coming off, the valve then fell into the bore smashing piston into bits. the conrods and pins all fine, whole bottom end rotating fine as well as bearings all good. Quite possible valve float and piston hit it, cause the retainer was cracked in the process.
hi guys
Yeh there was only damage to one bore. Thanks for all the theories but im quite sure it was cause of valve springs. Remember I had toda A cams with more lift and duration then stock b16a camsnot dialed in as well. Most likely valve boucing/float caused by springs not up to it.
End of the day you can only come up with what happen from the evidence, only god knows what actually happen. All i know for a fact is that i was reving it hard. I know alot of you say Im stupid for doing so but all my past cars were fine.
Reply With Quote
Originally Posted by BlitZ
Bookmarks