Help please! Rover 75 2.5 v6 timing belt
 

hi,

ive had a rover 75 v6 sat on my driver for sometime and really want to get it going.

i plugged it in and it had 2 faults, multiple misfire and system too rich.

looking under the bonnet it was clear that the upper timing belt casing on the camshaft pulley was wobbling as you tried to start it up. having removed the casing you could visibly see the pulley wobbling as if the securing washer bolt has been misthreaded in somewhere and the pulley isnt rotating properly.

before i found this when you tried turning the engine it would catch but stall after a second on two. the person i purchased it off said it just cut out on them.

suggestions on where to go next.....

Afraid that doesnt sound good for the engine. Cambelt change on a KV6 is rather involved. Garages charge upwards of £550 to change them, I would think any apparent problem with a cam will involve the changing and setting up of the cam belts. If one of the cam pulley's is wobbling when turning, thats not good, may have snapped.


would suggest getting the engine into a safe locked position and check timing marks etc

Could this be yet another snapped camshaft????
I hope it's not of course but the wobbly pulley makes me think it could be

I would tend to agree, something broken, if not the shaft, then the pulley. Rotate to safe position, insert pin through bell housing, check, and if need be, dismantle and check.
Enjoy.
I seem to re-call a recent similar complaint, either on this or the other forum. Can't remember a result though. Might be worth a search.

hmm interesting....
 

curse of the snapped camshaft you say?? id say youre spot on, have you got any links to any other cases of this?

ive now taken the pulley off and the end of the camshaft has snapped partially which in turn has worn part of the inner pulley centre. therefore im going to have to put a new pulley on.

however my mechanic friend has suggested that the (excuse if i use incorrect terms) lower camshaft can be swopped with the damaged top one as the end in question isnt being used on the lower one and therefore the limited damage will not affect it. the upper one will then be in perfect condition with the new pulley on it. we have already stripped down to this point before light stopped play.

im literally just about to order the new pulley now...

ps: it looks like this cars barely seen an oil change given the 'chrismas pudding' weve been scooping out!!

kaiser - you're right - both were broken!

I'm not a V6 man so couldn't say as to wether or not you could swap cams but there's been a couple of cases of snapped exhaust cams just lately, I'm not suggesting for one minute it's a common fault as these 2 are the only ones I've come across. I'll have a look for a link or 2 :D

Here's one we dont find out until later in the thread but have a read
http://www.the75andztclub.co.uk/foru...ad.php?t=48220

Don't recon much for the valves chances either. :(

Just for info, whilst both the inlet and exhaust camshafts look the same they do have different part numbers . The profiles on the cams may well be different if you are still thinking of swapping them :shrug:
Please post some photos of the damaged shaft ends if possible ? I'm sure you've got a few of us curious now !

If something is broken in this area, it is either as a result of a mighty shock (impact), fatigue (tiredness) or material fault.
I think you should try and establish a cause, and then take it from there.
I would tend to not trust something that has broken! but I would feel much better if I could establish what has happened.
I can't comment about the inlet exhaust cams, but to my great surprise I realized that they are identical on the 1.8 turbo, although positioned slightly differently determined by a little pin on each cam sprocket. The two different part numbers, however, indicate that this is not the case for the V6.
I would do a proper repair, or none at all. These are difficult engines, requiring lots of effort. Either do it right (and by that I don not necessarily mean by the book!!) or buy a Toyota:D
I only belatedly read the part of the christmas pudding!! I would start my search there. I have a sneaky feeling this may somehow have a relation to what you see. Is it on the oil side or in the water?

stock take...ssshhh dont mention that, one thing at a time otherwise i might give up hope altogether!

im going to see if this bit goes ok first, get the timing belt back on and do a compression test, but yes youre probably right about valves!

chris - no worries i'l get some photos on for you, probably tomorrow night as its dark outside to take decent photos, but i might manage to get the pulley pic on later

This is the fourth one in as many weeks IIRC, Maybe the cams are made out of the same **** as the front springs and don't like the cold weather :(

i will show you the pics but to me it looks like a failure in the camshaft material, which in turn as it was then rotating off centre has caused excessive wear on the inside of the pulley centre causing it to partially crumble

right, wheres my local rover dealership to complain?!!!!!

oh just some food for thought....

ive read around the stories now of other peoples camshafts breaking and they all appear to be 80,000+ miles covered.

mine however is a 2002 v6 2.5 conn and has only covered 42,000 from new!

:lol: Hello there Wiltshire.75, if it's any help I can advise and good garage* local to me in Poole and, I also have a `spare' KV6 engine just removed but was running ok 2 weeks back. NO timing problems at all so, whatever you need will be on that engine. PM me if you need and please be quick as the engine is still at the garage* who swapped mine. I can of course also check on progress should you use that garage*; Good luck and happy new year. Mike. :shrug: :lol:

hi, thanks for the info and offer. how much would you be looking for for the engine??

at the minute its looking like the camshafts arent interchangeable because of the different part numbers so the minimum im going to need is a camshaft, ive already ordered the pulley,

let me know your thoughts and prices

cheers

where are you based?

hi, im based near chippenham in wiltshire

Getting a spare engine to strip would be a good way to go.. :)

Chippenham is only about 65 miles ish North of Poole where Scribbler lives. Not a good road though, prob take you hour and a half ish each way..

There are very few decent roads in Dorset... heh heh..
..

:lol: Good to hear you're having my old engine Wiltshire 75, means it goes to a genuine enthusiast and you're close enough to sabotage me had I lied about it's history. (yes members I did say we are fairly cerain the Head gasket has failed) Though it drove normally for local mileage right up until its removal at Xmas. :shrug: Incidently, when you collect it don't pay unless you are totally happy with the engine, having asked Andy its history; there's well over the £100. worth of spares there for sure. Any problems you now have my home number and good luck sir. :smilie_re: Mike.

Rover 75 timing belt
 

Just for the record, the cam shafts are NOT inter changeable, the inlet camshaft cannot be used for the exhaust camshaft! the lobes are different, if the end of the camshaft has broken the more likely the woodruft key on the pulley has perished or the timing belt has stretched, the best way round this is the replace the camshaft, pulley and the woodruft key and don't forget to replace the pulley bolts fitting them with thread locking chemical ! i've done three of these engines and they are a total nightmare! normally charge about £700. Or buy a second hand engine!

Just for the record, the cam shafts are NOT inter changeable, the inlet camshaft cannot be used for the exhaust camshaft! the lobes are different, if the end of the camshaft has broken the more likely the woodruft key on the pulley has perished or the timing belt has stretched, the best way round this is the replace the camshaft, pulley and the woodruft key and don't forget to replace the pulley bolts fitting them with thread locking chemical ! i've done three of these engines and they are a total nightmare! normally charge about £700. Or buy a second hand engine!

This thread was done and dusted back in 2010 mate. ;)

Maybe an old thread but you can swap the exhaust camshafts from the front bank to the rear bank and vice versa which means the damaged end would be in the cap