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#1
Posted 07 October 2012 - 11:16 AM
after getting oil pressure without ignition it fired up and purred like a kitten. The cams in it had been pretty lumpy in the 2 ltr that was in the car before. So at first, I was a bit surprised how smooth it was.
I had it running for a while to getting the thermostat to open and top up the rad. after about ten minutes the idle started to lump up. I thought nothing of that given how lumpy the idle was before in the 2 ltr. Little did I know that was the start of the exhaust cam gear slipping...it then suddenly stated to make a loud clacking noise. just like a really loud lifter that hasn't bled yet.
shut done and investigate....pulled the cam cover off and all looked normal. I popped a couple of lifters out on the inlet side because they because they looked a bit high. They were full of oil and fine.
disconnected the CAS and briefly cranked......loud clack emanating from front of engine. removed top cam cover....discover that three of the five adjusting nuts on the exhaust cam have disappeared and the cam has slipped to full retard.
yes my fault....should have checked the nuts were tight. NEVER assume because...blah blah blah.
so....Ive put the cam timing back to zero and it runs sweetly.
So .....what are the chances of bent valves guys? I think it went to 12 degrees retard. It had good piston to valve clearance , but that was when it was timed at the correctly.
I will put the bore cam in tomorrow to look for marks on the pistons.
fuck fidanza!! why would they leave them loose ???
BRIAN
Black evo 1 full road rego and done properly/legally
I have heaps of parts...but never the one I need.
#2
Posted 07 October 2012 - 11:26 AM
#3
Posted 07 October 2012 - 11:30 AM
BRIAN
Black evo 1 full road rego and done properly/legally
I have heaps of parts...but never the one I need.
#4
Posted 07 October 2012 - 12:07 PM
Too new to be accurate...rings wont be bedded in yet
I don't understand? If the valves are even slightly bent, shouldn't the compression be greatly reduced?
Just an idea...but what if you turn the crank to TDC, feed compressed air into cylinder 1 or 4 and listen for it coming out the exhaust or throw a balloon/glad wrap over the exhaust tip? You'd need a very well sealed exhaust system for that to work though... haha - what a dumb idea, I should go to bed
Omg, what a pain. I feel sorry for you man. I hope it all works out for you.
#5
Posted 07 October 2012 - 12:13 PM
Yrs ago I put 2 sonata cam caps closest to the cam gears thinking they will be the same as the rest of the R4 caps.
They strangled the cams & sheared the pin off one cam gear & bingo, valves into the pistons. Spewed at myself grrrr.
Cheers !
#6
Posted 07 October 2012 - 12:15 PM
or just pump some air in there and listen at exhaust pipe.
or,
pull exhaust off and put a little kero into each port (rotating engine to test the cylinder with valves shut). it will dissapear if there is any valves not sealed.
i think there would be enough of a downhill run to the valves to allow enough fluid to cover valve heads.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.
#7
Posted 07 October 2012 - 12:20 PM
Sucks man... Fingers crossed for you...
AMG | http://www.4gtuner.c...mmc-galant-amg/
GVR4 | http://www.4gtuner.c...shi-galant-vr4/
Springy Motors | Autronic | Motec
#8
Posted 07 October 2012 - 12:26 PM
The dynamic viscosity of water = 0.890 and of Kerosene = 0.00164....much thinner than water.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.
#9
Posted 07 October 2012 - 01:50 PM
Thats some bad luck mate Hope its nothing too serious or nothing at all for that matter other than slight tippity taps.
Yeah my Fidanzas that I recently installed were also only a little more than finger tight when removed new from the box.
Torque specs I see are 40-45 inch/lbs.
330kw atw @ 28psi 98 pump fuel.
372kw atw @ 28psi E85 Flexfuel.
EVOLVED AWD COUPE
WWW.EVOCOUPE.NET
#10
Posted 07 October 2012 - 03:16 PM
will shove the bore cam in to check for witness marks on the pistons. I think the clack noise was the cam gear going full advance then retard back and forth. the two last bolts have worn away the blue anodizing
BRIAN
Black evo 1 full road rego and done properly/legally
I have heaps of parts...but never the one I need.
#11
Posted 08 October 2012 - 01:33 AM
When i first got my Fidanza cam gears, i was amazed at how shitty the nuts and bolts (studs) looked. I did a quick hunt around for some replacements as i generally dilike imperial sizings on my car but i didnt find anything to replace them with.
In the end i just nipped them up with a blob on loc-tite to be sure.
Edited by to4garret, 08 October 2012 - 01:34 AM.
#12
Posted 08 October 2012 - 02:15 PM
pulled off the front timing covers and all the nuts and washers fell out. reattached all the covers and belts. Ran the the engine....all quiet!! Did compression test. 175 0n all four. I was a happy man until the brand new cam belt tensioner started making noises like a stuffed ac tensioner.
even to it is a pain in the arse to have to change it...it is easier than taking the head off!!
BRIAN
Black evo 1 full road rego and done properly/legally
I have heaps of parts...but never the one I need.
#13
Posted 08 October 2012 - 02:29 PM
A stroke of luck at least... couldve been worse.
330kw atw @ 28psi 98 pump fuel.
372kw atw @ 28psi E85 Flexfuel.
EVOLVED AWD COUPE
WWW.EVOCOUPE.NET
#14
Posted 08 October 2012 - 08:23 PM
#15
Posted 10 October 2012 - 02:47 AM
Likely you only need to adjust the cams no more than say 6* retarded (unless the head or block is skimmed a lot) so this would lock it from going 12 degrees retarded if it slips.
- Marc likes this
#16
Posted 10 October 2012 - 04:08 AM
BRIAN
Black evo 1 full road rego and done properly/legally
I have heaps of parts...but never the one I need.
#17
Posted 10 October 2012 - 04:50 AM
------------------------- 4G63T AWD COUPE -------------------------
----------------------- WWW.EVOCOUPE.NET -----------------------
#18
Posted 10 October 2012 - 06:21 AM
#19
Posted 10 October 2012 - 07:12 AM
Would a small bolt on each gear really matter? Or do two on each gear, opposing eachother so its more even.
#20
Posted 10 October 2012 - 07:22 AM
To me that soudns like 1 bolt on the whole gear, maybe i interpreted that incorrectly
------------------------- 4G63T AWD COUPE -------------------------
----------------------- WWW.EVOCOUPE.NET -----------------------
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