[Brooksy]

Hey all, I've got a 91 sierra that had a genuine Suzuki A/C system installed in 94, which was the year they switched to R134a, on the receipt they haven't recorded the gas charge. Does anyone know the capacity of the R134a systems?

[want33s]

My book is from USA and doesn't list Sierra/Samurai.
It says Swift gets 1.10lbs(500g) and Sidekick[Vitara] gets 1.33lbs(600g).
I'd expect a Sierra to take at least 450g.

[Brooksy]

Hmm, I found a random site that says 510g, but whether I can trust it or not is another question haha 500ish sounds about right, might just have to do it by feel. Thanks for that mate!

[want33s]

Wack 300g in and the TX valve will allow the pump to run. Add 75g increments and keep an eye on the pressures on H and L.
For R134a:
LOW side should be 21-28 psi
HIGH side should be 256-313psi

[Brooksy]

Alright cool, thanks for your help!

[want33s]

Brooksy wrote:

....cool.....

Hopefully