Changing Timing chain

kennierobo

Buy & Sell Member
#1
Well after much debating of should I shouldnt I Today out came the engine minus gearbox (chew) leaving it in situ would have been easier lifting the whole lot out then spliting it but its done now so it will have to be. I have never done timing chains before as ive always had belts and the k11 micras ive had never needed the attention, As I said yesterday the complete kit was £195 Blue Print spares I bought it before I went to the trouble of removing engine and a host of covers as I thought if im going to the trouble its getting done anyway. After measuring the piston tensioner very nearly 2cm it was clear to me that the route of the problem was in fact the chain that said the haynes manual to me on this subject was as much use as a chocolate fire guard. To cut a long story short ive done the job and im hopefull that everything is where its supposed to be sprockets ect and all thats left to do is rebuild the covers engine ect fit back in and hope when I turn it over it runs. If someone was to ask can you do mine the answer would be no thanks to much chew I can see now where the minimum £600 price tag comes in, that said with the engine out there is bags of room in the engine bay prime location for a 2ltr lump.................sorry but I took no photos as battery is flat on camera but maybe tommorow i will post a few up............:eek:
 

kennierobo

Buy & Sell Member
#3
new chain tensioner, sprockets, guides ect one days work and only half completed will take another day to see it through and maybe thursday morning who knows????
 

kennierobo

Buy & Sell Member
#5
Not that easy to fit sr20 you would have to re loom whole car to get it running then you still would be without power steering, its not as straight forward as it was with the k11
 

frank

Club Member
#6
its one of those hyvo chains eh ken :eek: and that vtc mechanism looks a pita to work on eh fwn (i,m glad mine is straight forward)
 

kennierobo

Buy & Sell Member
#7
TBH frank Im not sure its correct, haynes manual says to use 3 bar pressure down oil feed and to rock camshaft untill you hear a click, thing is I heard no click im hoping that the shafts havent moved as I forgot to mark them up. First thing I was taught when doing belts was to mark everything up just lack of sleep I guess. If its wrong lets hope it wont do to much damage. I would love to be able to use a k11 engine in there I wonder how hard it would be to do that.......
 

Guy

Has gone over to the oily side...
#9
Juan, some of the earlier 1.2 and 1.4 K12s were fitted with poor quality chains that stretched too much. Eventually the timing drifted too far out and the fault light would come on. These chains had to be replaced .
 

kennierobo

Buy & Sell Member
#10
I havent got the manual to hand for the tolerance but at 2cm displacement (tensioner) that would be 20mm which is more than enough to warrant chain been replaced.
Plus it ran like a bag of hammers so im hopefull that it will now be cured, It seems a little extreem to remove the engine to do this job after all ive read that the whole job can be done in a day and with the engine in situ tbh I would have to see this there is no way I could have taken the engine apart without removing it no matter how many axle stands or how ever high I lifted it. And the price tag to get it done at nissan about a grand other garages vary from 600 quid upwards this however includes parts seals oil ect, im lucky that I have a rather large garage and all the tools to hand including lifting gear so I was able to tackle it myself, if I hadnt the tools ect then given the work and time involved yes I would pay 600 quid in a heartbeat even if that ment taking it down to frank then picking it up again. I thought that I was a pretty good hand when it came to mechanics I grew up in a garage and my entire youth was spent there but this job has me nervous not that im not confident as to the standard of my work ive just never done a chain and there is so much that can go wrong. Degrees of dificulty for the novice mechanic I would put it at 10 your better off paying a garage or mobile mechanic like frank to do the job for you.:wow:
 

kennierobo

Buy & Sell Member
#12
Frank I went into garage this morning with fresh eyes and did the old tdc thing re lined the sprockets made sure everything was on the marks then re fitted the chain makeing sure the 3 gold links lined perfectly with the correct marks on bottom pully and sprockets, then spent 2 hours getting all the crappy sealent off the sumps timing covers ect. rebuilt it all and refitted engine filled with oil fluids ect then came the time to fire it up. Ticks over like a new kitten lol rev counter has stopped flickering so all thats left to do is put the offside light cluster and grill bits, bonet back in and road test it tommorow lunch time. So what now that the k12 has a new chain full service and runs perfect............................SELL IT and buy another k11 lol
 

kennierobo

Buy & Sell Member
#15
Cheers guys! Tell you what though if it wasnt for the fact that there is so much work involved I would be happy to do these but its the crappy sealant that you have to remove it takes as long as dismantling the engine.


 

kennierobo

Buy & Sell Member
#16
ON the early k12 it will have 3 notches on the bottom pully and the timing chain cover will have a protusion on it left side looking at it, the centre notch is top dead centre , with the top chain cover removed turn engine via nut on bottom pully your looking to line up sprockets and pully at top dead centre before removing old chain, you can also for referance remove the first spark plug this will make it easier to turn engine also if you remove dipstick clean off oil then you can put this down plug hole you will see it rise as engine is turned you will be able to see tdc as it reaches peak...frank knows what I mean.
 

kennierobo

Buy & Sell Member
#17
After driving the car today I am well pleased with results no more cutting out at junctions no more flicky rev counter and no more vibrations at 60mph, happy days are here again, la la la:laugh:
 
#18
Amazing job! :)

After replaced the chain for one time I will have to change the chain again after the same miles? Because, generally, the chain should never changed...

Thank you!
 
#19
Just completed this job myself and noticed a big improvement, the chain's should have never gone in the fist place, If I had to do this again I would do it in the car, drill 2 holes to gain access to the oil pick up pipe and take the front cover off, would save having to pull the top sump, remove zaust and the rest of the crap, I am of course never planning on doing another one of these but it could have been a damn sight easier if they had put a bit of thought into the engine design, mind you if they had admited it was a fault and fixed them it would have been even easier.
 

kennierobo

Buy & Sell Member
#20
2nd that statement im still toying with putting in the 2ltr lump, every part of my brain says no dont try it, BUT to my understanding it hasnt been done with any great success and the cudos of been the first would be good. I know the 998cc engine in mine leaves a lot to be desired even with the timming chain done, I have been looking for a cheap primera or sunny but up tp now i havent found one but when i do then i will certanly give it some very serious consideration
 
#21
Excellent post, hope you don't mind but I've linked to this from cubeownersclub.co.uk as the 2nd gen cube shares the CR14DE engine.

Could you clarify the model years of the 'early' K12s that have this weakness if possible?

Is it fair to assume that replacement chain kits available to buy now are the improved equivalent?

Thanks
Phil
 
#25
Can I ask that did you have to SETUP the new VVC inlet sprocket or just fit it ? I ask as I have been told a new one does Not require any setting up. I'm planning on doing this job next week. Thanks
 
#26
Check out the tensioner on this one

Just pulled this one apart for a chain kit replacement. Car's last service was three years ago :eek:
Sump removal was a bit of a pain but the engine is still in the car :)

Craig
 
#32
Yes the engine has to come out as there is no room with the chassis leg in the way to get at the parts. ADL/Blueprint is basically genuine parts in Blueprint boxes.
If you fit a kit complete with NEW pulleys inc the variable one, you Dont need to set it up using the compressed air. You just align the marks and the oil pressure once started will sort it out
 
#33
thnks northerner ,,ive never tackled this task of a job before so im really dreading it ..is there any other thing i gotta look out for ? i just wanna get this right i dread the way my sister speak about the car ..i bought it for her from a auction ..without checking the odds sounds ...
 
#34
You need to order a new oil pump O-ring and make sure you remove all the old sealant from the sumps and oil pump prior to sealing it up again. Print off the manual as it showes you how to apply the sealant. The other main thing it to make sure you HOLD the inlet cam steady with a wrench when tightening the nut to avoid damaging the VVC pulley
 
#37
Today I have removed the K12 engine out of the car then taken the cover off and found the lefthand belt tensioner rail snapped where it pivots so not sure how to make sure when I fit the new BGA kit chain that it goes on correctly. I have bought the complete kit with both sprockets and crankshaft sprocket. How do I make sure I realign all the camshafts and the crank properly.
 
#38
Sorry to drag this thread up but I have just finished a timing chain on a k12 1.0 53 plate micra took engine out everything went smoothly even got a the vvt click at first time of trying, everything cleaned up nice new chain went on fine, span it by hand once i built covers back up and span over fine, but now ive got the full engine back together it will turn over but will not fire,

When i removed the fuel rail i was a bit hasty and actually disconnected injectors so lost some fuel so if i have an airlock in the fuel system how can i purge? i have already attempted to tow start the car with no success,

Its not immobiliser as the light illuminates then goes off after a few seconds,

Anyone point me to something i may not of already checked?
 
#39
Well after much debating of should I shouldnt I Today out came the engine minus gearbox (chew) leaving it in situ would have been easier lifting the whole lot out then spliting it but its done now so it will have to be. I have never done timing chains before as ive always had belts and the k11 micras ive had never needed the attention, As I said yesterday the complete kit was £195 Blue Print spares I bought it before I went to the trouble of removing engine and a host of covers as I thought if im going to the trouble its getting done anyway. After measuring the piston tensioner very nearly 2cm it was clear to me that the route of the problem was in fact the chain that said the haynes manual to me on this subject was as much use as a chocolate fire guard. To cut a long story short ive done the job and im hopefull that everything is where its supposed to be sprockets ect and all thats left to do is rebuild the covers engine ect fit back in and hope when I turn it over it runs. If someone was to ask can you do mine the answer would be no thanks to much chew I can see now where the minimum £600 price tag comes in, that said with the engine out there is bags of room in the engine bay prime location for a 2ltr lump.................sorry but I took no photos as battery is flat on camera but maybe tommorow i will post a few up............:eek:
Hello, could I ask if you can help, I just cannot get the vvti unit to disengage the pin so I can undo the end both? Do you have any ideas how to do this, no compressed air just foot pump, and no special tool to take four screws out of end of unit.
 
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