right this is doing my head in, the engine was supposed to have had a rebuild b4 i bought it and its tappinng,
ive changed the cam shaft and its still making the same sorta noise any ideas hears a video of the noise, help please

 

difficult to tell from the vid; my initial thought was top end, but on second hearing i'm not so sure

i assume its there from cold as well as warm?

never had one of those engines so not too familiar with them; what have you tried so far?

any tell tale signs of a worn bottom end?

 

I'd go for rocker wear or tappet wear, not jacking up properly.
tabetha

 

did you change just the cam on its own?

 

i can not tell by looking at the video wot engine it is i take it is a cvh??? try changing the lifters as well as the cam

 

CVH 1.6 Turbo...if its standard that is

 

CVH lifters are quite noisey in general anyways !!

Got no sound at work, but looks like a standard CVH rocker cover.

Are they new lifters wit the cam & are all the rockers tight ??

jb

 

that sounds worse on a vid to me on that sounds like bottom end nocking as well as tappets theres two tones of nocking one deep nocking and one rattly tapping

 

sorry yea its an rs turbo cvh engine i changed the cam shaft and the lifters? maybe i didnt do them u to the right setting whats the torque setting 4 the rocker arms?

 

What was the engine like before you changed the cam and lifters, what is the oil pressure with the engine hot, and cold, rocker arm nut 25-29nm, or 18-21,Ibft, did you bed the cam in with the lifters,, and is the cam timing correct as it sounds like a diesel, what make cam is it,

Regards Dave R.

 

erm in what way? , dont know th oil pressure aint got a oil guage, i think the timing is correct but my mechanic m8 did it so duno, im no gd at timing really

 

cant your mechanic mate have a look at it for you?

 

yea but ive asked him and he doesnt really say much so cant b ared with him tbh, took me like nearly 2 months to get him to change my cam shaft and that so lol

 

i think ill torque up the rocker arms and check there right and see if it still persists but any other ideas would be grateful

 

is it diesel lol....... no just kidding it sounds like little ends to me

 

haha yea i was thinking the same

 

To bed a cam in you have to run it @ like 2k for 10-15 mins.

How quickly does the oil light turn off when you start the engine ?? Both hot & cold, is it split second or is there a moment between the engine firing & the light extinguishing ??

jb

 

erm like a second or so not that long but not straight away

 

I had a knocking on my last engine, youd have sworn it was the cam, turned out to be the bottom end, confirmed this by takin a sparkplug out of each cylinder one at a time and firing it up, when I got to the dodgy cylinder the knocking was quieter due to less pressure on the bearing.... not the most accurate diagnosis but worked for me. have to agree with the other post, sounds like there are multiple knocks... or is someone at the door!

 

hmmm the engine was meant to have had a rebuild b4 i bought the car so it cant have been done well if im gettin problems already

 

all depends who rebuilt the engine and why it was rebuilt if it was rebuilt due to nocking before maybe not cleaned out properly and picked up a bit of crap again if i was closer id come and have a look

 

sounds like my old cossie when i timed it up wrong and the valves were hitting the pistons

 

spose that could be right, will ahve to take it to a garage and get it timed up see if that sorts it

 

right i tightened up the rocker arms to the torque setting but still no change, but i found out 2day that my mate got me a normal 1.6 cam instead of the rs turbo one now would this make it knock?

 

bump

 

no it wont make it knock

iirc the std cams are the same anyway

 

Sounds bottom end related to me bud

 

And there was me thinking my cvh was noisey.Put it in a garage mate

 

gr8 thats all i need how much does a bottom end normally cost then?

 

up

 

do it yourself, they are easy by all accounts

 

bottom end mate.take crank out,get it reground and brand new matched shells 4 it.sorted!

 

oh rite didn't realize it was that simple. is there any where around hertfordshire that would reground the crank then? or would a zvh conversion be cheaper?

 

i paid 120quid 4 a crank grind and new shells.must be somewhere in ur area that work in engineering engine work mate.place i use is in daventry northamptonshire. carcom engineering

 

how does the noise sound when reving the engine?

 

sounds more like the little end bearings which unfortunately means new pistons

 

its gets a tiny it louder but not 2 loud and but it doesnt start as soon as i turn the engine on it takes a little time and you can only hear it when the revs drop quite low like 1000 revs cos it normally sits on 1500revs