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paulstanf

New Member
Hi all, my l322 wouldn't start last week, after a week of diagnosis the garage reckon my timing chain has jumped, the guy who normally borrows them the tool is on holiday, so i was wondering if anyone has one we can borrow to crank the timing chain back please
im willing to pay a 'rental' fee
thanks again
 
Helps to know if it is a diesel or petrol and also model year, engine size etc

The L322 ran from 2002 to 2013 and had 2 different BMW engines (1 V8 petrol and 1 I6 diesel) and 5 different Jag derived engines (1 N/A V8, 2 S/C V8's and 2 V8 Diesels)...
 
paulstanf said:
Hi all, my l322 wouldn't start last week, after a week of diagnosis the garage reckon my timing chain has jumped, the guy who normally borrows them the tool is on holiday, so i was wondering if anyone has one we can borrow to crank the timing chain back please
im willing to pay a 'rental' fee
thanks again
Click to expand...
Timing chain jumped? To me that sounds unlikely without it causing damage.
 
+1 on Datatek. It would be making a hell of a racket if there is that much slop in chains - 4 to choose from.
 
garage reckon a misfire has caused it, there was no rattling or banging at all car drove sweet until it went into garage for a battery, then it came out with low compression on 4 cylinders and a misfire and no one can get it to start now - stumped!
garage have said have looked at all cheap fixes and everything now points to timing chain has jumped
 
The M62 uses a long single timing chain to drive the intake cam through the VANOS hydraulic timing system.

The Exhaust cam is driven by a chain from the Intake Cam....

The long chain is tensioned using guides and a hydraulic tensioner....photos attached.

The Guides do wear and overtime cause chain slapping noises...there have been reports of guides snapping or breaking up, but the noise would be horrendous and the turning over of the engine would cause untold noises and rattles if not valves hitting pistons causing extensive damage.

If it had jumped, it would still try to fire albeit with backfiring and allsorts of popping and farting noises as the valves are opening and closing at all the wrong times!

Guides in RED and Tensioner in BLUE
M62TUB44_Front_View_Guides.gif


DSC02497.jpg


DSC_0013.jpg


Retiming the chain is not just about locking the crank, but there a good few tools and locking devices needed to lock the cams, the VANOS and other such stuff in place and is not a job for the fainthearted...

If the garage say the chain has jumped - why the hell are still turning the engine over in an attempt to start it - this could cause irreparable damage - find a new garage!
 
paulstanf said:
garage reckon a misfire has caused it, there was no rattling or banging at all car drove sweet until it went into garage for a battery, then it came out with low compression on 4 cylinders and a misfire and no one can get it to start now - stumped!
garage have said have looked at all cheap fixes and everything now points to timing chain has jumped
Click to expand...

this is my op & no ref of detonation of character to anyone but im with saint & its a load of c**p your being told ,I wouldnt mess about for a tool you took it to have a battery swapped & whilst in there charge the engine has gone wrong sorry id say ill pick it up when its fixed cause that engine is 3k for a second hand one:eek:
 
Tbf if it is the vanos then it's pretty much an engine out job anyway. Plus the cost of the new vanos then fitting aswell.

Vanos don't tend to go wrong.


If mine went in needing a battery and same out needing an engine then I'd be having a few choice words. And I would choose nice ones.


Sounds stupid, but it the battery they put on charged? Have they messed th key sync so not switching off the immobiliser?
Did they do a proper batt change? Did they keep it alive with a jump pack whilst changing? Or do the full disconnect procedure?
 
thanks for the responses everyone, the original garage kept it alive with a jump pack, it was a new battery fully charged apparently, it was working the day they did the battery change but they blew the fuse in the windows, they kept it in overnight and when they went to start it the next day it wouldn't start, just kept trying but wouldn't start. they replaced the spark plugs but still wouldn't start, they then said they couldn't do any more as it was beyond them what was wrong, they pushed the car to the side of the road and i had to get the AA to take it to another garage. so i took it to one that fixed a cam belt/engine rebuild for me last year.
they've had it for 5 days now, said they've tried all the 'simple fixes' but still not starting, 4 of the 8 chambers are registering low compression 50-60 psi i believe.
they say all things are pointing to the timing chain jumping due to a misfire on cyldiner 6.
it sounds like a sewing machine when its being turned over.
thing is 14months ago 10k miles ago the previous owner had the chains replaced at a cost of £1500.
 
don't know if it makes a difference but it has an lpg conversion.
still on sunday it was running like a dream
monday it wouldn't start but a jump from the AA got it going
Tuesday - won't start at all, new battery & plugs
 
Actually sounds like a fuel issue to me

Checked for fuel pressure on the rail?

Oh, how did they blow a fuse???? If they have blown one then they may have done quite some damage.
There's a thread on here somewhere, a bloke changed his battery and toutched the pos, and killed the car. Took months of replacing stuff and some very cleaver people to work out what he had fried.

I don't mean to sound like the bearer of bad news but it's possible.
Saint will know who I'm on about, he played a big part in it
 
If it's got LPG, you can force start it on LPG rather than petrol, not advised to do too often tho
 
Deasy said:
Actually sounds like a fuel issue to me

Checked for fuel pressure on the rail?

Oh, how did they blow a fuse???? If they have blown one then they may have done quite some damage.
There's a thread on here somewhere, a bloke changed his battery and toutched the pos, and killed the car. Took months of replacing stuff and some very cleaver people to work out what he had fried.

I don't mean to sound like the bearer of bad news but it's possible.
Saint will know who I'm on about, he played a big part in it
Click to expand...

If it is the one I am thinking of, that was Neo2 with his P38...

I am with you on a fuel issue....my fuel pump went - just like that one minute fine, next nothing, no spark, nothing at all, not even starting o easy start...reason being the fuel pressure sensor had cut the ignition system preventing sparking!

Remove the Acoustic Cover and you'll see the bright fuel rail - on here is a Schreider valve, crank engine and VERY CAREFULLY hold in the centre of the valve (it is like a tyre valve) and be ready to catch any fuel spray....if there is fuel under pressure then look elsewhere, if there is no fuel pressure, you in tank pump has gone south - dead simple to fix, I even did a How To in the How To section....try this first!

If it is Singer Sewing Machine smooth on turning over, then I would be dubious on jumped timing chain...esp. as it has had new ones...I put my engine through some hard tasks and it has never ever jumped a cog on heavy accel. or anyother operation....

My BMW 735 has the same engine albeit the 3.5 litre version (M62TUB35 against M62TUB44) and that has a misfire problem and lumpy idle - this is due to a small vacuum leak in the intake system and I get misfire codes on diagnostics....and at times it can be quite drastic - and it has never jumped a tooth on the timing system and that engine is from 1999 on original chains and guides at 134k miles.....
 
Yeah that's the one saint, forgot it was a p38.

I can't really see that it's possible to jump a cog? Not without causing serious engine issues. In which case a jumped cog is least of your worries.

It really sounds like my experience with the fuel pump. Even though I had it plugged in to diag and it said the pump was fine, as the pump isnt actually monitored.
Will only find it with manual tests
 
Deasy said:
Yeah that's the one saint, forgot it was a p38.

I can't really see that it's possible to jump a cog? Not without causing serious engine issues. In which case a jumped cog is least of your worries.

It really sounds like my experience with the fuel pump. Even though I had it plugged in to diag and it said the pump was fine, as the pump isnt actually monitored.
Will only find it with manual tests
Click to expand...

Very true - my bust pump never showed on diagnostics either....

Hope advice is heeded as it is a simple test to see if it is producing any pressure!
 
im with saint & deasy on the fuel pump as mine also failed with no warning at all it will turn over & nearly fire but just wont catch,never heard of a chain jump unless one of the tensioners failed but it would have been chattering loudly + the vanos usually gives warning before failure
 
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