akeemc90

ElevationTC

cracked ringlands = det

You may not of notice it yet.. But in time it would have failed. Ive pulled other motors out to see cracked ringlands with no issues.

Hell the car even put down 275 to the wheels (b16a2) ran fine.. we pulled it part to sleeve the block and seen that and were like wtf!

johnhawkins

iTrader: (1)

Any scoring would be noticable right? When rubbing with a finger I dont feel anything.

DezodDon

Did you buy a stock engine from us? I'm confused. Either way that coolant jacket sleeve was an 07+ addition to the engine design only. It was never in the 05-06 engine, they did this to improve coolant around the cylinders so that they could run a lighter engine oil and absorb the additional heat created by friction from the piston to wall clearance. They were trying to reduce friction.

Cracked ring lands comes as a result of too much heat in a cylinder whether it be lean, too high an EGT meaning not enough timing but this is probably not the case with your engine. Pistons designed for NA purposes have thinner ring lands to reduce the mass of the piston. They also have steel struts cast into the aluminum piston like a rib cage. These hold the piston to a nominal size. Piston to wall clearance on a stock engine with cast pistons is smaller as a result. Forged pistons do not have struts cast in because they are not cast, they are hammered from a chunk of aluminum. As a result of this and different alloys forged pistons expand and require a decent piston to wall clearance in order to not scuff.

What I am getting at here is that when you boost a NA engine with stock internals you are applying more heat. More power = more heat in the engine. These parts expand more than they were designed to and as a result you get increased wear on the thrust side of the piston. Ring gaps butt together, ring lands expand due to the increased heat and when the conditions for detonation are correct the resulting force of detonation will be transferred through the piston and crack the ring land. Usually on the thrust side as that is the one being forced down.

If you are lucky they stay in their place you just lose a little compression and may experience some smoke. If you are not lucky then pieces come loose and rattle and get pounded around inside that cylinder and damage the combustion chamber, most times after that the head is useless because even if you clean up the damage if there are areas that are pitted they tend to act as stress risers and lead to cracks or detonation from hot spots in the chamber disrupting the proper propagation of the flame front during combustion.

Scoring you would want to worry about would be anything you can catch a finger nail on. Most scoring like that will come out with a good hone. If after a hone it's still there then you will need to bore the cylinder and then re-hone.

johnhawkins

iTrader: (1)

Thanks Don...Deff some good info there....I dont feel ANYHTING when I rub the cylinder walls so there is deff no scoring...and you can still clearly see the original cross hatch...I purchased a 05 block from Dezod West a while ago with the help of Paul that I was going to use but decided against it. Any differences in using apposed to not using the coolant flow plastic piece????

DezodDon

Not sure if the block will allow for use of the sleeve. Check it out and see.

johnhawkins

iTrader: (1)

B_Real45

you should make a shroud. the fans will work much more efficiently.

johnhawkins

iTrader: (1)

I was thining bout it what you think - Push the Air out of the engine bay or in?

B_Real45

With a shroud a pull might be better.

johnhawkins

iTrader: (1)

I always forget push is puching the air out and pull is pulling the air from outside in? Wouldnt it be bad to put a shroud on the outside of the radiator how the fans are mounted now due to the fact that when in motion not much air would be going thru the rad?

B_Real45

no you want the fans and shroud on the other side... engine side. air pulled in from outside.

johnhawkins

iTrader: (1)

No I deff need them mounted on the outside of the rad due to clearance issues.

B_Real45

Ah I see.. is it only on one side of the radiator that you need clearance? If so, you can do a push and a pull.. one on each side.

Or you can get a custom half-sized radiator made.

johnhawkins

iTrader: (1)

Yea I might just do one on either side...to switch the motors direction just switch the two wires?

B_Real45

Only if they're designed that way. Some fans cannot have their polarity reversed.

johnhawkins

iTrader: (1)

Yea I dont think the kind I have can be reversed...so I have to take the fans off the rad now and unbolt the fan and reverse the direction........so that mean I have to buy 2 more sets of mouting kits....

B_Real45

Mounting kits can be purchased almost anywhere. Try your local auto parts stores first.

trd07tc

iTrader: (-1)

civic radiator FTW.

btw when I bought my slim fan a WHILE ago I think i remember the manual saying if u want to reserve the fan wire it in backwards

johnhawkins

iTrader: (1)

I wasthinkin a half rad but then hav to worry about new hoses