1992 Cadillac Deville

1992 CADILLAC DEVILLE
142,000 MILES • 4.9L • V8 • FWD • AUTOMATIC
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SEAN03
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  • 523 POSTS
Hi I have a 1992 Cadillac Deville. Their is nothing on the a/c system it leaked out. Tomorrow I am going to put nitrogen in the a/c system but I am not sure how much I can put in it. I was thinking maybe 20-30 pounds at the most. What do you think. I do have r12 a 30lb bottle. I also bout some red tek 12a that is a sealer basically. It is just like hot shot. I know hot shot works very well my dad uses it in ac systems when r12 was phased out. He would fix the leak then recharge it with hotshot. Thanks.
Jun 2, 2014 at 11:32 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
I tneeds to beleak checked first and 20-30 punds it is to much unless you are talking about pressure. it needs freoon to leak check electronically anyhow.
Jun 2, 2014 at 10:54 PM
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SEAN03
  • MEMBER
  • 523 POSTS
Yeah sorry I was typing fast last night. I meant to put 20-30 for pressure. Is that enough or should I do 50 for pressure. Thanks.
Jun 3, 2014 at 10:53 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
50 would be better but if you don't have a leak checker it's not going to tell you anything because it can be a very slow leak. that's is why you need to have it tested electronically and you can't with nitrogen
Jun 3, 2014 at 11:44 PM
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