1992 Cadillac Deville

SEAN03

MEMBER
1992 CADILLAC DEVILLE
4.9L
V8
FWD
AUTOMATIC
142,000 MILES

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.

Monday, June 2nd, 2014 AT 6:32 PM

3 Replies

HMAC300

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.

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Tuesday, June 3rd, 2014 AT 5:54 AM

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.

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Tuesday, June 3rd, 2014 AT 5:53 PM

HMAC300

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

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Wednesday, June 4th, 2014 AT 6:44 AM