Need to replace the evaporator on 93 maxima how big a job is it

water pump is cheap tirty dollars for it but putting in is different story runs by timming chain under the cover big job dont try this unless you have done this before .

Most likely you will be doing the timing belt
as well as the water pump

So yes,big job that only an experienced
person should do.

Heat Shield is loose - it's flopping around. Sounds like an engine issue, but it's not.

I had the same problem on a '93 Altima & again on my 2003 Maxima a few months ago. A local garage fixed it for free both times. For the Altima, he just removed the shield. He advised that I do not park on high, dry grass as contact with the grass might start a fire (around here, cars are usually on pavement all the time - the grass thing was not an issue - and, there were no fires). On the 2003 Maxima, the garage was able to replace the rusted out clamp using some scrap material they had lying around. The heat shield was resecured into position. No more pinging.

I had Nissan take a look at the 2003 Maxima repair afterwards. They said the garage did a nice job.

cooling coil??? you mean the evaporator to the air conditioning. if it is leaking water onto the ground there is nothing wrong with it. changing an evaporator is a big job,and you must be certified to handle the freon. This one job that should be left to an expert. Plan to spend at least 900 bucks.

Its a big job, The heater box needs to come out, which entails discharging the AC, removing heater hoses, and hardware at the firewall. The complete dashboard needs to be removed and swung out of the way, steering column lowered , and heater box removed and disassembled for evap replacement ( simplified )

Hello Ruckse.
Your Buick was not equipped with a filter in that model year.
If the airflow is poor it is possible that your AC evaporator over the years has developed a layer of dust restricting the airflow through the system.
The evaporator would need to be accessed to clean it.
This is a job best left to a professional as it can be a difficult job.

Like I said before, It is difficult to get to, under the intake manifold, it needs to be replaced. There are a couple of ways to takcle this. You could try to manuver it out, or remove what ever is surrounding it to get it out. Either way it's not a 1, 2 job it's going to take some time. The last one I did I chose to manuver it out. It took me about 3 hours and I cursed at it for 3 hours! So, the option is yours. That should FixYa.

Does the leakage smell like coolant if so most likely the heater core, if it is just plain water the evaporator core, and heater core box could have a leak from being cracked letting the condensation leak into the floor especially if the evaporator drain tube is clogged. If it only does it when it rains well roll all the windows up shut doors run a water hose all over where there is wheather strippping to see if it seeps in.

very large job by the look of it, can download workshop manual from pdftown.com
degas air cond, drop coolant, remove dash, reomve front seats, remove console, remove heater and evaporator case assembly then get to replace heater core.
as i said big job.

We recently changed the power steering line on our 93 Maxima. Bought the hose from Advance Auto Parts. No problem.