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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: tigwelder on July 04, 2011, 11:19:06 am

Title: heater core??
Post by: tigwelder on July 04, 2011, 11:19:06 am

changing heater core 85 k20. got the unit out of truck no problem. can't get core out of box. removed 4 screws but acts like there are more.

Title: Re: heater core??
Post by: beastie_3 on July 04, 2011, 11:35:09 am

Dunno if it changed later on, but my 79 has 4 screws holding 2 brackets. It could be some old caulking or something holding it in in a area you cant see.

Title: Re: heater core??
Post by: tigwelder on July 06, 2011, 10:49:29 pm

yes it is different in 85.

Title: Re: heater core??
Post by: Dr_Snooz on July 08, 2011, 12:16:01 am

If memory serves, I had to pry open the end and slide the old core out. I never was able to get it completely open. I think there is a bracket in there that causes the snag.

Title: Re: heater core??
Post by: tigwelder on July 10, 2011, 06:36:09 am

vacuum arm  has a nut that has to come off.about a 2 hr job removing and installing core.