Yes, there is an engine diagram for a 1998 Ford Escort Zx2. It is found in the manual specified for this car.
Autozone.com
In a 2001 Ford Escort ZX2 ( for North America ) That is a 2.0 liter Dual Over Head Cam four cylinder engine
I own one and it has a 2.0 zetec engine
the wall behind the engine
no
The engine diagram for the 1999 Ford Escort ZX2 can be found in the owner's manual for the car. You can also find the engine diagram online at Owner.Ford.Com or on the Do It Yourself website.
No, the engine does not have to be removed.
A broken timing belt on a Ford ZX2 will not damage the engine. The 2.0 ZETEC engine used in the ZX2 is a non-interference engine which means the pistons will not come into contact with the valves should the belt break. Because of this the valves will not be damaged and no engine damage will occur.
on firewall behind the engine
For a 2002 Ford Escort ZX2 ( in North America ) ( that would be the 2.0 litre , Dual Over Head Cam Zetec four cylinder engine )
No, it is a Mazda engine. The Zx2 was assembled in Mexico..