Newbie injector questions

[mtnbob]

Ok my 86 golf 1.6 n/a is running great! New injector pump, new rings, rebuilt head, new bearings. What do I need to know about the injectors? The car has 110,000 original miles on it, and probably the original injectors. It sat for 7 years before I started to fix it up. I see everyone saying rebuild injectors every 60,000 or so. Please excuse my stupid question, but can I buy nozzles and put them on the injector myself, or is this beyond a rookie? Am I better off buying complete rebuilt ones? What is pop testing?

Thanks

Robert

[jtanguay]

safest option: get rebuilt injectors or bring your injectors to a shop and get them rebuilt properly.

pop test is to test the opening pressure of your injectors.  Turbo is 155 bar while N/A is 135 bar.  opening pressure can affect timing so it is considered critical.

worn injector nozzles can spray so bad that they can melt a hole in a piston.  installing new nozzles on injectors yourself will assure that doesn't happen, but you must be totally clean!  there is a writeup by someone about how to sand down the sealing surface so that the injector doesn't leak...  the pop pressure might be off, but at least you'll have a safe injection pattern.

[mtnbob]

how are these?
http://www2.discountvdubparts.com/parts/parts1/discountvdubparts/wizard.jsp?year=1986&make=VW&model=GOL-D-001&category=D&part=Diesel+Injector&dp=false