Hydrolocked Neo CPS now under going some internal mods

drexchan

2,000 RPM
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One drunken piston refuse to wake up for work after drinking too much sky juice.
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs126.snc4/36660_133538873335356_100000377312513_228195_8245841_n.jpg

and its 'rod' down there swung open a hole on the crankcase wall
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs101.snc4/35424_133539173335326_100000377312513_228196_6340946_n.jpg

Vented hood and an open pod sitting right below the vents caused a serious hydrolock after a heavy rain. Second cylinder drank most of the sky juice and the conrod snapped almost instantly. Conrod cap swung open a 3cm x 5cm hole on the crankcase wall. Piston jammed in the cylinder and that's it.

Supposed to be a repair job on this 2 month old CPS. After some discussion with the owner, we decided to do some minor internal modification since the work and time required has no difference.

In short, the engine will be enlarged to 1639cc from 1597cc. The flywheel, crankshaft and the crank pulley will be balanced and lightened as one assembly. All new pistons and conrods (1 new rod) will be weighed, lightened and balanced.

At this moment, the engine has been completely dismantled to the last pieces, cleaned and sent to be repaired and modified. New oversize pistons, new rings, new bearings, seals and gaskets are already here.

For a week or so, our job is to wipe the car shiny clean. :D

---------- Post added at 09:40 PM ---------- 6 hour anti-bump limit - Previous post was at 09:29 PM ----------

CPS intake camshaft with trilobe cam profile. The middle lobe is used when CPS is not activated. Side lobes pushes the valves by few mm further.
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs120.snc4/36377_10150195570330154_576425153_13533390_7185899_n.jpg
 
Last edited:
Transmission sitting on a stand, holding up by its own mounting.
http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs281.ash1/20842_10150195570740154_576425153_13533409_5656647_n.jpg
 
Update:

deformation has been detected on the crankshaft on the balancing jig.

Journal #2 is deformed by 0.1mm.

Calling for a new $$$$$$$$ crankshaft.
 
drex...my car also almost drank too much water too after heavy rain...good thing this didnt happen to me. good to see u write up about this!
 
Drex, very nice and thread..keep it rolling..just some Qs though...what piston will be going into the new enlarged block? from another car make or after market?
 
hmmm... abit wori my persona ll end up like this
my 1st car, prelude 2rd gen, suck alot of water by my-custom made CAI during 2006 dec flood in jb. oni open plug n clean. very big question mark on sp4h durabilty. if this happen on me, i juz change to ck mivec
 
drex...my car also almost drank too much water too after heavy rain...good thing this didnt happen to me. good to see u write up about this!

The car was parked under heavy rain for few hours, and the intake ram pipe was slanting up wards. Slowly, waster flows into the ram pipe through the vents and filter, filling it up and the moment the key was turned to ON, water flows into the manifold. The intake manifold was almost completely filled up like a water bucket while we were removing it out of the car. All cylinders were filled with water but the second one took most of it, probably because it was the first to start with intake stroke.

It's not a bout CAI, vented hood or what so ever, it's a bout a poorly designed setup, and pure bad luck.

Drex, very nice and thread..keep it rolling..just some Qs though...what piston will be going into the new enlarged block? from another car make or after market?

Overhaul replacement, size 1.00.

hmmm... abit wori my persona ll end up like this
my 1st car, prelude 2rd gen, suck alot of water by my-custom made CAI during 2006 dec flood in jb. oni open plug n clean. very big question mark on sp4h durabilty. if this happen on me, i juz change to ck mivec

Your engine would have die off the moment water meets the throttle body, so not much was actually ingested by the engine.

In this Neo CPS case, the owner tried repeatitive cranking - which adds more damage to the engine.
 
Water Filling the intake manifold
http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs517.ash1/30478_407913155747_595190747_4595959_7889004_n.jpg

More about the Titanic hole
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs048.ash2/35754_407913360747_595190747_4595970_5534968_n.jpg

CPS activation solenoid
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs048.ash2/35754_407913380747_595190747_4595974_7540892_n.jpg

Hydraulic Valve Lifter
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs088.snc4/35754_407913395747_595190747_4595976_850627_n.jpg

Super long head bolt
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs147.snc4/36734_407913550747_595190747_4595980_4338214_n.jpg

New oil seals, bearings, gaskets, piston rings, and a connecting rod
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs147.snc4/36734_407913580747_595190747_4595986_31118_n.jpg

The new 77mm pistons
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs067.ash2/36734_407913590747_595190747_4595988_3668402_n.jpg
 
drex, where do you get the new pistons? What brand? What was the original piston size for the CPS? TQ
 
I assume the new pistons come together with the rings right? since the pictures are separated. How about the gasket...sorry for asking so much because I'm really interested to know much..
 
I assume the new pistons come together with the rings right? since the pictures are separated. How about the gasket...sorry for asking so much because I'm really interested to know much..

Oversized rings are order separately.
 
CPS project update: Got a use replacement crankshaft today. Sent to machinist for polishing and check on straightness. Will know the result tomorrow. If everything is fine, will start lightening and balancing the internal parts. Hope to see the block assembled by this weekend.
 
Update: discovered that the replacement crankshaft is also bent. No choice, ordered a new one, which costs ALOT!
 
how much? need 3k?

---------- Post added at 02:03 PM ---------- 6 hour anti-bump limit - Previous post was at 01:47 PM ----------

Water Filling the intake manifold
http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs517.ash1/30478_407913155747_595190747_4595959_7889004_n.jpg

More about the Titanic hole
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs048.ash2/35754_407913360747_595190747_4595970_5534968_n.jpg

CPS activation solenoid
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs048.ash2/35754_407913380747_595190747_4595974_7540892_n.jpg

Hydraulic Valve Lifter
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs088.snc4/35754_407913395747_595190747_4595976_850627_n.jpg

Super long head bolt
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs147.snc4/36734_407913550747_595190747_4595980_4338214_n.jpg

New oil seals, bearings, gaskets, piston rings, and a connecting rod
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs147.snc4/36734_407913580747_595190747_4595986_31118_n.jpg

The new 77mm pistons
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs067.ash2/36734_407913590747_595190747_4595988_3668402_n.jpg

the bolt measure in INCH!!!!
 
The intake air ram is it some sort like the open pod air way? Well, if that the case i m very worry to park my Neo under rain....:proud:
 

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