You could "hit it with a bigger hammer" and by that I mean, don't try to figure it out, just replace the whole head.

 

You could "hit it with a bigger hammer" and by that I mean, don't try to figure it out, just replace the whole head.

 

Is it posable that one of the cams was installed 'Off One tooth', and when lift happens, the Valves are hitting the pistons.. ?.. Engine should be 'Real Doggy' if the Cams are off..

The only thing I can relate it to, was I had an engine that the Con rods would Stretch ( and the Bearings were worn ) and at higher Revs, the Pistons would hit the Head, made a 'Hell of a Noise'... The only thing that I can think of that would be that close during lift, is the Valves..

Cap

 

<div class='quotetop'>QUOTE (Kevin Beane @ May 14 2009, 06:34 PM) <{POST_SNAPBACK}></div>

You could "hit it with a bigger hammer" and by that I mean, don't try to figure it out, just replace the whole head.[/b]

one of the avenue i may cross. but information is priceless. I believe i have taken some neccessary step to insure that something like that will be much delayed. I mean will engine wear & tear eventually. ok maybe the first failure was wasnt deligent enough on oil check (maybe)

sigh, my salvage 2zz swap engine was a very low low milage. problems like these is pretty sapping my morale. (let me not start with the stuffs i bought that had my paying more $$$ (double shipping) just some stuff because it was package together by sender) accumulated problems is probably giving me the rash.

problem is this is a ported head from US during 2zz swap. The original 2zz head has now missing rocker parts & items (misplaced by shop some time back). may now have to look for another head. :cussing:

<div class='quotetop'>QUOTE (Cap Weir @ May 14 2009, 06:42 PM) <{POST_SNAPBACK}></div>

Is it posable that one of the cams was installed 'Off One tooth', and when lift happens, the Valves are hitting the pistons.. ?.. Engine should be 'Real Doggy' if the Cams are off..

The only thing I can relate it to, was I had an engine that the Con rods would Stretch ( and the Bearings were worn ) and at higher Revs, the Pistons would hit the Head, made a 'Hell of a Noise'... The only thing that I can think of that would be that close during lift, is the Valves..

Cap[/b]

possible, XXX(cross finger)XX hope its also the cam pulley, i remember seeing someone posting the new replacement part from toyota. not sure if it this forum or the celica or lotus site.

cap, & you change the whole internals?

 

I've always equated hi-rpm/load firecrackers with spark misfire.

If you put the stock ECU back in does it reveal any codes?

 

<div class='quotetop'>QUOTE (WTS @ May 14 2009, 09:56 PM) <{POST_SNAPBACK}></div>

I've always equated hi-rpm/load firecrackers with spark misfire.

If you put the stock ECU back in does it reveal any codes?[/b]

same loud crackling noise even with stock ECU during Lift.

yeah i know about the spark misfire sound but this noise sounds more of a Lift stuggle/hessitant crackle.
Shop sent an sms, he for-the-moment discount the valve hitting pistons teory. Not completely but will visit there if other steps faults are look into~as that would mean completely opening top from bottom.

 

If the Cams are out of Time, The car will run Poorly, and the Compression Pressure Test will be Low.

Do a Compression Test..

Cap

 

<div class='quotetop'>QUOTE (Cap Weir @ May 15 2009, 04:25 AM) <{POST_SNAPBACK}></div>

If the Cams are out of Time, The car will run Poorly, and the Compression Pressure Test will be Low.
Do a Compression Test..
Cap[/b]

opps forgot to mention, compression is fine (did a test). cant remember the numbers but i think they were good (will check on numbers). OCV filters are clean. I'm using Castrol Edge 10W40. stock 2zz oil filter.

 

Did somebody machine too much off the head, when they did the head work?.. Or the wrong pistons..

Cap

 

<div class='quotetop'>QUOTE (Cap Weir @ May 15 2009, 08:47 AM) <{POST_SNAPBACK}></div>

Did somebody machine too much off the head, when they did the head work?.. Or the wrong pistons..

Cap[/b]

i been running without problems for more than a year, pistons are stock 2zz & the head was actually from a respected forumer here (LR) so, its good.

the shop may just remove the rocker arms to check lifters. well, fingers cross if the can find source of the noise, (my assumption is would be erratic lift or what cause it to have low oil pressure during lift)

will chime back in if they do discover problem source. thks cap, kev, cin

 

long overdue photos.

i'm been spyderless for over a month plus now.

was terribly busy with work & attending family matters
spyder was left at 2nd mechanic's shop & this was what was discovered.

intake cam were worn (much like what the same that had happened to the 2zz lotus forum~w/pix)
the rockers also suffered much damage, & the biggest surprise was the missing piece that had broken off the bottom of the rocker.

1; I must have neglected to deligently check engine oil.
2; I've been too lift happy (overrev & stay in nirvana too long)

heat/& my past oil pump gear might have contributed to this. who knows.
:help:

awaiting new intake cam & rocker arms.

sigh, it's horrible not driving the spyder. i must be suffering some form of depression. (effects of nausea, vomiting, hallucination, sleepless nights was observed to have occurred)

 

Thankyou for the Update.. I've been wondering what happened to this Motor..

Cap

 

Dude I so feel for you, bankin on about a month so far myself, hopefully LittleRocket will be my savior because I feel like everyone else has been trying to screw me left and right. Hopefully soon we'll both be in lift nirvana .

Can you share more about how that happened so hopefully the rest of us can avoid it? Are you just playing it off or making hypotheticals when you say your oil was low (I know the oiling is mucho important in lift). did you really find your oil to be low etc?

To me it looks like something big got loose in there bu tmaybe somone who opens this engine up often can throw in their 2 cents.

-Spargo

 

[edit]

Can you share more about how that happened so hopefully the rest of us can avoid it? Are you just playing it off or making hypotheticals when you say your oil was low (I know the oiling is mucho important in lift). did you really find your oil to be low etc?
-Spargo

firstly, given the opportunity, I'm the chap who drives into lift mod in all honesty i dont think I could have done anything to prevent it. but anyhow, there were moments of minor irregularity that may have led to such catastrophic damage (which i will point shortly) but appears 2zz owners may had already seen such tingles.

I'm actually rather deligent in my oil checks (after all dont most of us had experience losing oil with 1zz). it been a habit of mine to periodially check.

if at all i would draw a point to this episode, i would paddle back way back to when i tried to change my stock oil pump gear to curcuitworks OPG . found tht the stock OPG had scarring on the side. didnt change to curcuitwork then (freak wrong size/thickness), still shop changed to a new toyota OPG. so i continued to run without an aftermarket OPG.

in the continuing issue was the random overheating of the 2zz after a long drive/track. tried the noted bubble bleeding & for a while it was ok only to periodically come back. it came open to be pretty serious that i had to take spare coolant to top up. Took to change the radiator (its 8years now, i suspect after such a long ownership probably clogged passage(?), or it could be the 1zz water pump that the shop had opted to use instead of the 2zz's water pump on my 2zz engine)

Only 1 occassion, i found that i had low oil (but not none) & i probably ran low for a while. now one might discount if its only this occassion but running 2zz & being lift happy, it was about the next few week that i first experience the annoying crackling noise.

for the moment i wouldn't discount the short period of low oil to contribute to the acceleration on the intake cam wear. however the exhaust cam shows No sign of wear(???) strange right?

[edit] shop did suspect the oil may play a part in cam wear, but the broken piece on the rocket arm may be a freak or a very high pressure/load (or low oil preassure) to cause the broken piece. They have not taken apart the whole engine for further investigation. (awaiting the new items to do so)

maybe all this came in tandem & contributed to such damage.:cussing:
the wearing of the intake cam was likely over a period of time. how long or short, i dont know.












side note; Spargo, 'lift nirvana' once bitten its an eternal adddiction. sure mine got the rather extreamer version (link to my mods )

 

I see you finally got to the bottom of the problem. Wow. I need to change my oil pump gears someday. One more thing on the "to do" list.

 

=-p[;/.banmeplease

 

You can go for overkill like I have. I had the circutworx gears cryo'd and all new oil pump parts, shimmed the oil pump spring for more pressure, Moroso pan, and an acusump sitting on the shelf ready for me to install it. Ya think I belive in a belt and a couple pairs of suspenders?

Did I sell you that accusump? I'd like to buy it back lol.

 

=-pl;,.

 

scary huh

 

=-[;'/.banmeplease

 

http://www.lotustalk.com/forums/f25/camshaft-cover-defect-causing-rocker-arm-breakage-p1302-50594/

 

i read that too

the 1st shop is in the opinion, oil does lube itself from the cam, (i'm no idea on this), the oil squirting from the engine cover is probably a safeguard.

 

I'm sorry I just got what I was looking at, thats not wear thats massive damage wtf!? maybe the donnor car was in a bad crash? thats crazy

-Spargo