AC compressors
 

are the nippondenso and the sanden compressors interchangeable if i switch the lines with them? as far as mounting and using the same belt?

Mounting and belts, yes.

Hoses and connections, no. You may be able to have the Sanden hose ends professionally swapped on the Denso hoses and vice versa. Simply swapping out the hoses may not work, don't know anyone with that experience.

ok so ive been away for a while, i have the sanden compressor
i just went outside and screwed the denso lines onto the ones that are on my care and they screw on right. what else would i need to do to convert to 134 a?

To do it properly means draining all the oil, replacing the o-rings with HNBR, evacuating the system and then add an R134a conversion oil.

The sanden units aren't as forgiving as the denso units for the conversion though.

So the hoses are interchangeble? Good information to know.

You really don't want to convert to 134a. Our condensers don't have enough capacity to allow a really effective 134a conversion. The pressures will be too high on the high side. If you adjust the charge, then you won't have effective system capacity due to what will essentially behave as a low charge. This means that on hot days or when the interior of your car is heat-soaked, when you really need A/C, you will have crappy performance.

You have a really four choices:
I have converted both my 1990 Vert and my 1988 10th Anniversary to R152a. This gas is completely compatible with all R134a lubricants. The pressures are very, very similar to R12. The high-side pressures are actually slightly lower than R12 at operational pressures and far lower than R134a. Both cars cool great.

I have also converted my 1999 Ford F150 and both of my 2004 Mazda6 systems to R152a. I've done a couple of other RX7's sucessfully as well-one for a friend and one for my son. Performance is excellent.

If you are curious, here is a full thread with all the details you need.

https://www.rx7club.com/2nd-generati...gerant-964688/

R152a is cheap and works fantastic. If you have further questions after reading the thread, ask those questions on that thread so the answers and information are all on the original thread. Installation details start on Post #42.

-Jack

well the hoses have to be the same as the condensers so denso hoses with denso condenser. however they connect to the car correctly.

can i use the parts i have now for the 152a?

the connections after the compressor are all the same, didn't change much from s4 to s5 in that respect.