Timing marks?

Post by **RCN** » 23 Mar 2014, 15:55

Is there timing marks on a 1.9L DG Petrol?
the engine diagnostic plug lead at the back has been cut.

Post by **Mocki** » 23 Mar 2014, 16:24

Yes on the main pulley, a "u" shaped one and a "v" shaped one on the outer edge. One is tdc the other 10°

Post by **itchyfeet** » 23 Mar 2014, 17:29

U shape is on the outer rim if the pulley away from the engine and is tdc
the v shape is on the inner rim of tge pulley and is 5 degrees or a 1.9 dg

The danger is that it may not have the right pulley

a 1.9 df is different again being 5 degrees atdc

Post by **Mocki** » 23 Mar 2014, 18:15

Doh! DJ and DH are 10° sorry, brain fart!
I ment to type 5° when I hit reply and failed

Post by **itchyfeet** » 23 Mar 2014, 20:10

Ok here is a standard dg pulley
Its 170mm diameter, circumferance is pie x d =534mm so 5 degrees is 7.3mm around the rim
if its 7.3 mm to the left of the u slot its a df pulley

cant comment on a dj pulley never seen one

Post by **RCN** » 24 Mar 2014, 14:57

I'm going to have to take a closer look when i get the chance. i have a 3 groove pulley

Post by **Mocki** » 24 Mar 2014, 18:02

DJ pulley is same diameter, but timing mark is twice the distance, so on your measurements, 14.6mm from tic mark.
the three groove pulley I'm assuming is power steering and air con also, the marks are on the biggest pulley.

Post by **ajsimmo** » 30 Mar 2014, 09:41

itchyfeet wrote: a 1.9 df is different again being 5 degrees btdc

Just to avoid confusion, a DG is 5° BTDC (set with vacuum off), whereas a DF is 5° ATDC (dual vac dizzy set with vacuum still attached), i.e. timing mark is other side of TDC notch.

And don't worry about the diagnostic (tdc sensor) plug being cut, nobody uses it anyway.

Post by **itchyfeet** » 30 Mar 2014, 12:27

Yes you are right thanks for spotting that
I will correct the post above

Post by **RCN** » 03 Apr 2014, 09:44

What is the ideal timing spot for a 1.9 DG Petrol, Automatic?
I read on here that 8 degrees BTDC was the "sweet spot". I set mine to that and it's OK but i don't have the same top end speed I used to have with my old engine
(N.B: New engine/appox 500miles, with new S.Steel exhaust system, compared with old engine, appx 160 miles and standard exhaust)
I'm thinking to put it back to 5 degrees BTDC. Any thoughts?

Post by **Mocki** » 03 Apr 2014, 13:01

5° btdc on petrol, 8° on LPG under normal circumstances

Post by **RCN** » 03 Apr 2014, 13:36

Thanks!

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