Mg zt 190 timing

em645 · 22nd January 2017, 15:02

Hi

If the 190 timing has been messed with and the front pulley timed to that of a 177, is there a way to tell? And can it be correctly timed back up without removing the cam cover?

Thanks

mh007 · 22nd January 2017, 17:19

Engine noise & misfires I would imagine! (bent valves?)
The only way to adjust the vlave timing (with or without the proper tools) is to remove the belt covers etc.

trikey · 22nd January 2017, 21:43

It will still run ok if it has been timed as a 180, it will just throw up an engine management light.

SCP440 · 22nd January 2017, 22:01

Quote:

Originally Posted by trikey

It will still run ok if it has been timed as a 180, it will just throw up an engine management light.

I would not guarantee the engine management light being on. I have recently done a belt on an Astra that the owner was complaining of lack of power and poor fuel consumption since the belt was done a few months ago. I was told by a main dealer it would not be the belt as the engine management would be on. No codes or pending codes just poor performance.

The garage that did the job have since ceased trading.

I tried to align the timing marks before I removed the old belt and it was clearly off, my guess at least one tooth but possibly 2. Anyway a new belt and correctly aligned and the car is now back to full health.

trikey · 22nd January 2017, 22:42

Well on a 190 timed as a 180, it definitely throw up a light, I know as I had to recode the car to a 177 and the light went out

mh007 · 23rd January 2017, 08:18

I would expect the management light to be on but surprised no damage would occur?
Having said that, I've always used the correct tools when doing a belt change etc so couldn't really be sure what would happen!

em645 · 23rd January 2017, 09:59

Thanks for replies chaps. My predicament:

190 made 167 on the rollers. Full service the day before including new vis motors and plugs.

I'm baffled - either got to be a dodgy dyno or timing out? Engine/car feels healthy.

Can I check if it's timed incorrectly?

T-Cut · 23rd January 2017, 10:23

Dynomometer measured power at the wheels is always lower than the power at the flywheel. I believe the '190' figure is the theoretical flywheel power. It seems to be at least 10% lower at the wheels and more with an automatic gearbox. And dynomometers do vary in cross referenced comparisons. A T4 session might reveal more indicators.

TC

em645 · 23rd January 2017, 11:02

Sorry t cut, should've been clearer...

167 was estimated/corrected crank power, 140 odd at wheels.

Thanks

trikey · 23rd January 2017, 11:27

Quote:

Originally Posted by em645

Sorry t cut, should've been clearer...

167 was estimated/corrected crank power, 140 odd at wheels.

Thanks

Check that one of the pulleys hasnt slipped one or two teeth, that seems very very low on bhp.

22nd January 2017, 15:02	#1
em645 Newbie MG ZT V8 Saloon Join Date: Jun 2015 Location: Walsall Posts: 16 Thanks: 1 Thanked 3 Times in 3 Posts	Mg zt 190 timing Hi If the 190 timing has been messed with and the front pulley timed to that of a 177, is there a way to tell? And can it be correctly timed back up without removing the cam cover? Thanks

22nd January 2017, 21:43	#3
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,766 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	It will still run ok if it has been timed as a 180, it will just throw up an engine management light. __________________ Lest we forget..

22nd January 2017, 22:42	#5
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,766 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Well on a 190 timed as a 180, it definitely throw up a light, I know as I had to recode the car to a 177 and the light went out __________________ Lest we forget..

23rd January 2017, 10:23	#8
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Dynomometer measured power at the wheels is always lower than the power at the flywheel. I believe the '190' figure is the theoretical flywheel power. It seems to be at least 10% lower at the wheels and more with an automatic gearbox. And dynomometers do vary in cross referenced comparisons. A T4 session might reveal more indicators. TC Last edited by T-Cut; 23rd January 2017 at 10:26..

22nd January 2017, 17:19	#2
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	Engine noise & misfires I would imagine! (bent valves?) The only way to adjust the vlave timing (with or without the proper tools) is to remove the belt covers etc.

23rd January 2017, 08:18	#6
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	I would expect the management light to be on but surprised no damage would occur? Having said that, I've always used the correct tools when doing a belt change etc so couldn't really be sure what would happen!

23rd January 2017, 09:59	#7
em645 Newbie MG ZT V8 Saloon Join Date: Jun 2015 Location: Walsall Posts: 16 Thanks: 1 Thanked 3 Times in 3 Posts	Thanks for replies chaps. My predicament: 190 made 167 on the rollers. Full service the day before including new vis motors and plugs. I'm baffled - either got to be a dodgy dyno or timing out? Engine/car feels healthy. Can I check if it's timed incorrectly?

23rd January 2017, 11:02	#9
em645 Newbie MG ZT V8 Saloon Join Date: Jun 2015 Location: Walsall Posts: 16 Thanks: 1 Thanked 3 Times in 3 Posts	Sorry t cut, should've been clearer... 167 was estimated/corrected crank power, 140 odd at wheels. Thanks