The 75 and ZT Owners Club Forums - View Single Post - MG ZT 190PS with 180 (177) timing is thus possible

Matt G · 19th August 2018, 09:24

Firstly, Thank you all for the really positive and most useful info.

To confirm my locking kit is the sealey set and yes I have the standard 2.5v6 locking plates and the additional mg190 plates too. As the rear cambelt pulleys did not align (by about 2 belt teeth) I decided to check the alignments before slackening the belt.

Basically in the safe position the 180 locking plates fits perfectly and the 190 ones did not suggesting it had been timed in that manner.

Thanks for the engine number info and also heads stamping info, I’ll check that tonight if time after work.

I’ll keep you updated in case this occurs to anyone else, in the future. But basically the plan is too.

1.)Mark up the belt and pulleys in the current timing config, so if I am wrong or make a mistake I have a reference point to go back too.
2.) slacken the belt main belt and align the camshaft with the 190 plates and then I am hoping the rear belts will re align those couple of degrees and restore faith. If not back to the drawing board.

I have heard it is easier to replace the rear belts first using relative belt position rather than notches and re tensioning off the main cambelt exhaust camshaft.

Also thanks for the info about the belt tensioning pulley. I’ll cross check that too when 5 time comes.

Last question am I right in think, that with this engine if miss timed in the wrong timing position (either 180 or 190) there is no chance of damaging the engine I.e the valves hitting the pistons?

Regards

Matt

19th August 2018, 09:24	#10
Matt G Regular poster MG ZT 190+ (Development car), mg zt 190SE (Twilight), MG ZS 180 Join Date: Nov 2017 Location: Waltham st lawrence Posts: 42 Thanks: 8 Thanked 6 Times in 6 Posts	Firstly, Thank you all for the really positive and most useful info. To confirm my locking kit is the sealey set and yes I have the standard 2.5v6 locking plates and the additional mg190 plates too. As the rear cambelt pulleys did not align (by about 2 belt teeth) I decided to check the alignments before slackening the belt. Basically in the safe position the 180 locking plates fits perfectly and the 190 ones did not suggesting it had been timed in that manner. Thanks for the engine number info and also heads stamping info, I’ll check that tonight if time after work. I’ll keep you updated in case this occurs to anyone else, in the future. But basically the plan is too. 1.)Mark up the belt and pulleys in the current timing config, so if I am wrong or make a mistake I have a reference point to go back too. 2.) slacken the belt main belt and align the camshaft with the 190 plates and then I am hoping the rear belts will re align those couple of degrees and restore faith. If not back to the drawing board. I have heard it is easier to replace the rear belts first using relative belt position rather than notches and re tensioning off the main cambelt exhaust camshaft. Also thanks for the info about the belt tensioning pulley. I’ll cross check that too when 5 time comes. Last question am I right in think, that with this engine if miss timed in the wrong timing position (either 180 or 190) there is no chance of damaging the engine I.e the valves hitting the pistons? Regards Matt