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7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

7,387

2,745

194

Kearney, NE

Aug 30, 2022

#21

• Aug 30, 2022

• #21

mustystang said:

I also got some Prestone cleaner, after I try to flush out the heater core some I will drain and do a fresh fill with water and the cleaner. I got 2 so I will drive it a good bit on 1 first and see if my results improve then do the 2nd one shortly after.

Click to expand...

Follow the instructions on the bottle and it should help without damaging anything. Adding vinegar or other non car specific stuff can be too harsh or ineffective.

 

cbxer55

Active Member

Jan 25, 2020

318

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38

Oklahoma

Aug 31, 2022

#22

• Aug 31, 2022

• #22

I replaced the water pump in mine earlier this year. I had no problems with filling it or air bubbles. Filled it after the pump was done, let it idle in the garage 15 minutes or so, then let it cool down overnight. Had to add maybe a quart the next morning. Took it for a drive around my favorite twisty curvy road after topping it. Let it sit overnight again. Had to add maybe a pint. No more since then.

I wonder if driving it around a hard twisty curvy road helps to get bubbles out of the nooks and crannies?

 

manicmechanic007

5 Year Member

Sep 26, 2017

2,524

709

143

Roy, Utah

Sep 1, 2022

#23

• Sep 1, 2022

• #23

Certainly the flush procedure could have made your heater core leak
Not common
Check the HVAC case drain for any wetness from either flush or antifreeze

 

Reactions: mustystang

Potomus Pete

I'm still waiting for the fully nude shots

5 Year Member

Mar 7, 2019

3,308

1,223

153

Sarasota Florida

Sep 1, 2022

#24

• Sep 1, 2022

• #24

I chickened out flushing my Jeep. I only left thr stuff in there for a half hour or less. I let the water do the work.

 

manicmechanic007

5 Year Member

Sep 26, 2017

2,524

709

143

Roy, Utah

Sep 1, 2022

#25

• Sep 1, 2022

• #25

The evaporator drain is rubber and does get clogged
You just need to twist it around in your fingers and squeeze it some to clean it out
Real easy
You put your eyes on it

 

manicmechanic007

5 Year Member

Sep 26, 2017

2,524

709

143

Roy, Utah

Sep 15, 2022

#26

• Sep 15, 2022

• #26

Electrolysis is common and bad (early 96 Taurus freeze plugs did not last a year)
GM has a technical bulletin to test the voltage in the coolant
Some have 3+ volts and that is a problem
Their solution is added ground wires
Just use your dvom to check. Put the red probe in the coolant with the engine running

 

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

7,387

2,745

194

Kearney, NE

Sep 15, 2022

#27

• Sep 15, 2022

• #27

Even a Harbor Freight Tool promo sale digital model will measure ohms (resistance), ac, and dc volts. I got one and have not used my high quality analog or my fancier digital one much since.
The amps or milliamps (1000th of an amp) the meters can measure vary a lot. A cheap meter might have only a 500 ma circuit, or a 10 amp port.
I have not seen a meter that can test the Cold Cranking Amps CCA of a full battery load without an induction clamp.

Some meters also check capacitors and transistors. Those features are not normally needed for troubleshooting on 79-93 cars.

 

manicmechanic007

5 Year Member

Sep 26, 2017

2,524

709

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Roy, Utah

Sep 15, 2022

#28

• Sep 15, 2022

• #28

They all will measure ohms. You do not need to spend a lot on one. I have 3 and use the cheap harbor freight one most of the time. I use my expensive Fluke when I am showing off. I use one with ground down nails for probe ends when I get serious back probing connectors.