nooooooooooooooooo......help!
 

RIGHT....

this bloody knocking............its driving me mad.

replaced rod big end bearings.....replaced crank main bearings.......set tappets.............

and

still

KNOCKING AT 2500 TO 3500 FREEEEEEAKING RPM on rev up.

about to junk this civ so please help me guys........

i can feel it through the pedals...even with the clutch in.

only a couple of guys have helped so far and their help was soooo much appreciated.

i know there is soo much experience out there that could help too.

please.

andy

belfast

Re: nooooooooooooooooo......help!
 

wow, i sence a NOOB. well, y dont u tell us whats goining on exactly, like what kind of knocking, wheres it coming from, what motor u have, what u have tryed to fix it, what u think it is, mods on your car, etc... what u posted dosent help much :P

Re: nooooooooooooooooo......help!
 

ok

1990 D16A9
only mods are K&N and Remus exhaust
93000 miles

Driven hard and serviced well.

When i rev the motor up on say, part throttle. At about 2500 - 3000 revs i can hear a knocking from the engine. I cant say where cos when i go to the bay its so darn noisey. I know i can feel this coming through the bulkhead. Its not drivetrain as it happens when the clutch is in and im stationery.

I threw the head up and ripped it apart at the weekend. Dropped the sump, removed and replaced the rod big ends with standard size aftermarket ones as there was no damage, only wear.

I then removed the crank mains and replaced them with standards too as although there was wear, there was no damage.

I left the original thrust washer, it wasn't too badly worn at all and i didnt think it would be responsible for this noise.

When i was rebuilding, i lost the order of the rocker arms and when i was setting the valve lash, i couldnt get the feeler under any of the lobes on no's 2 and 3 cylinder when they were at TDC. I had to set the clearances on the very back of the cam (opposite to lobe). It runs and its relatively quiet so i guess this is ok, just more work i suppose.

back to the problem.

I took it out for a wee run today and still the knock is there. I disconnected the alternator as i thought perhaps a bearing was gone there. No good.

I can also now hear nosies coming from the dizzy when the motor is running, i looked inside and there is nothing unusual......these noises are not constant, very random. Still runs good though.

I have a few final ideas, a few of them i will not due due to finances. My worst case scenario would be piston slap or wrist pin problems. Is this a likely problem? How do i tell?

I had also considered that the water pump was duff as it made a groaning noise when i turned it by hand without the belt, there is no resistance though and it is not a grinding noise, a rubbery groan.

Perhaps the oil pump? i have never ever seen the oil light stay on though.

Is there anything i am missing here gang, this car was seriously quick before i split it. No smoke or oil loss at all. Just not nice noises.

Help

Re: nooooooooooooooooo......help!
 

any metal shavings in the oil?

Re: nooooooooooooooooo......help!
 

you said you replaced everything with standards.
did you spec any bearing clearances?

for sound check this out. scroll down to knock at this site:
http://www.autohausaz.com/honda-auto...da-noises.html

Re: nooooooooooooooooo......help!
 

hi knight,

no there were no metal shavings in the oil at all......one of the crank mains was down to brass on one side. Thats all.

hi whiterice,

i didnt spec any bearings.......i was only able to get standard ones and honda really do take the piss over here in belfast.

noise hasnt got any better or worse for the new bearings though. Its probably more noticeable now as the engine seems to have gotten less rough with the new bearings.

what sort of damage could the wrist pin do?.....i really need this right now as my daily driver.......

thanks for the advice guys

Re: nooooooooooooooooo......help!
 

You NEED to platicguage the bearings when you replace them. The bearings and surfaces wear, so new bearings won't fix anything unless you are very lucky with the size they supplied.

Did you notice any strange marks on the cylinders when you had everything apart, any signs of wear?

Your laziness may have been a waste of time.

Re: nooooooooooooooooo......help!
 

maybe the cranks shot :-\

Re: nooooooooooooooooo......help!
 

awww guys, dont be so down on me..............for a start, you have no idea how hard it is to get sh!t like that done over here.

i read an article and asked 4 garages if the could do the whole plastigague thing for me...........they just stared and said what?

its ok for you guys over there. i was quoted 1200 uk pounds for new bottom end bearings fitted....that was the cheapest. The car is worth about 800 over here. Why would i pay that?

i just wanted to get a bit more life outta it.

i aint lazy...........i spent 4 days working on it. i just cant spend a freaking dumb amount of money on it ok...............

thanks for the effort

out

Re: nooooooooooooooooo......help!
 

if it's only worth 800 over there, don't ------- worry about it. if it runs, run it till it dies, then either sell it for like 500, or swap another one in and have fun. if it ain't broke, don't fix it. but as for your problem, maybe piston slap?

Re: nooooooooooooooooo......help!
 

i think your problem is that you didnt plastiguage them. They arent that hard to use at all. You go to a auto part store and buy a plastiguage. They shouldnt be that much. If the bearings are not within spec. It will cause a loud knock in your engine. And it doesnt take that much time to plastiguage them. Any lost of power? When you disassemble the block, it's fairly obvious if you've spun a bearing because that journal will look kind of scratched or smeared. You spent 4 days working on it. Why not take another 15 mins to plastiguage them?


The knocking sound I experienced when I spun a rod was loud and constant, regardless of whether I was revving the motor or not. I was out in the middle of nowhere when it happened, so I had to drive 5-10 miles before I could shut her off. I didn't rev it above 3000 rpm, because it sounded like it was going to blow up. Luckily it spun the outside, and so the crank was not scratched up. If the load on the bearing surface (from the cumbustion/power stroke and inertia) exceeds the oil pressure on the bearing surface, you are going to start wearing the bearings. mine were paper thin when I pulled them out. The best way to check is when the engine is cold quickly *blip* the throttle so the rpms go up to about 2500 and as they descend listen for an accentuated *rattle or knock*. If you suspect this, with the engine idling, go to your spark plug wires and pull them off out one at a time if the noise goes away after pulling a spark plug wire then you know which cylinder is guilty.

If none of this applies to you then you probably don't have a bad bearing.

But if you do have a bad bearing, there is a possability that you can just replace the bearing without having to regrind/replace the journal. But of course you have to check the tolerances on the journal. If the journal needs to be lathed or replaced, you have a rebuild on your hands. If the journal is fine, you can (in certain cases) get away with just replacing the bearings.

Before you do anything else. Dont start the car. You might make things worst. Drop the oil pan and see if your crankshaft is scratch or scruffed. If the crank is scratched or scruffed take it to a machine shop and get it micropolished. Or buy another crankshaft. I recommend replacing the rod/main bearings. But before you installed them again. PLASTIGUAGE THEM!!! They arent hard to do. Not sure if UK sells any helms manual. If not then check this link out. https://www.homemadeturbo.com/forum/...?topic=10912.0

Re: nooooooooooooooooo......help!
 

arent the rod barings color matched? sounds like u didnt do it right, but if its only when the clutch is in then maybe its the throw out baring or somthin in the trani, idk, spring, somthin broke, but it could be valvetrain noise, like valve chatter, rod knock , spun rod, and some other ----. idk, but sounds like somthin maybe within the trani if its only wiht the clutch in/?

Re: nooooooooooooooooo......help!
 

where exactly is the noise coming from?

Re: nooooooooooooooooo......help!
 

Hi guys

i dont think its tranny, i just meant that its easier to hear when stationery and the clutch is pressed in. The bearing that comes with a clutch kit (sorry, dont know its name) is noisey too.

you can hear it while driving too but only when revving between 2500 to 2500 ish. It doesnt happen at idle and i am losing absolutely no power or oil. I tried that whole pulling out the plugs thing an drevving to see if the noise went and it didnt. No difference on any cylinder.

I have yet to go round the engine with a stethascope but from what i can tell its definately the block somewhere. Only cos i can feel it through the bulkhead and i dont imagine valvetrain would do that.

None of the bearings were spun......just lightly worn.

All bearings sitting perfect under caps and no scores underneath.

Me changing the bearings hasnt changed the noise at all (not even worse) making me think that it aint bearings.

Re: nooooooooooooooooo......help!
 

just check your clearance again. you never know.

Re: nooooooooooooooooo......help!
 

swap it .. dseries are dime a dozen .. but until you , turn the radio up !

Re: nooooooooooooooooo......help!
 

lol....ok guys.

gonna put the K&N back on her and drive her through the floor.

have a couple of new engines lined up.

when it expires..ill prolly just replace the block cos i know the head is as sweet as a nut.

thanks for the advice

andy

Re: nooooooooooooooooo......help!
 

better watch it though if you beat the piss out of it and throw a rod and tap the head with a piston and wreck that too. Just buy a shortblock and take a loss on the bearings.

Re: nooooooooooooooooo......help!
 

i hear what you are saying bro........surely she wouldnt throw a rod with new bearings even though i didnt size em.........errrr scary.

checked the valve clearances AGAIN......spot on.

still knocking.........making me sick man.

car still drives very very well.........just a wee touch ruff.

did i miss any bearings that would make this noise.........i replaced the 5 crank journals........4 rod ends.........didnt do the thrust washer as it didnt look too bad.....a wee bit scuffed.

dang............pissin me off

Re: nooooooooooooooooo......help!
 

You are asking for trouble if you dont plastiguage them like what i said before. It can be new bearings, but if it is not within spec. You will continue to encounter the knocking sound.