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Originally Posted by brcidd
Hi- I have a '94 Astro- Just replaced the engine in it myself- bought a used 117K mile engine for $500- mine had had 315,000 when the rod bearings starting knocking- Glad to know I saved $2400- any way- I also do A/C work on all GM products- what you are hearing is the compressor coming on and off (cycling) due to low load conditions- if it is 30 degrees out- don't expect the a/c to cool very much- the compressor may or may not come on any way at such low temps- To adequately test it- you need to have it in at least a 70 degree environment- and then look for vent temps of around 38- 40 deg f on lower blower speeds- the fan may be rubbing the shroud at different points- a simple adjustment is needed if this is the case. Does the air come out of the vents as requested- most times a vacuum leak will cause the air to always come out the defrost- no other places- if the air comes out where it should and the compressor is turning on and off at low load- 30-40 degrees ambient- you probably don't have a problem. Have the mechanic check the fan shroud- for rubbing and go from there....
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Thanks brcidd,
I picked it up today, and all is well. As far as the compressor coming on and off; I know that's what it was, but the sound was way to loud inside the van, and it never had that sound before. Anyway; it seems to be fine now, and even though it was a pretty penny; I'm extremely happy with the job. I was sitting at a stop light today, and I coulding even feel or hear the engine running, and this is no exaggeration either. My previous engine had 228,000 on it, and it was still strong as can be. I was in passing gear while passing a wrecker that was throwing big chunks of broken glass at my windshield from a car it was towing, and I got caught with to little time to pass with a car approaching from the other direction, ans I had to floor it while already in passing gear, and it spun a rod bearing. Even after the bearing spun; the engine was running like a top; except the rod knocking of course. This Astro van has been the best van I've ever owne, and I've owned about 5 different models. Thanks again for the quick answer. John Sr.