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03-21-2017
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#1 |
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Join Date: May 2016
Location: Whangarei New Zealand
Posts: 29
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LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
Greetings fellow ZR1s from Down Under.
I currently have my ZR1 in the workshop looking somewhat forlorn. The air conditioning compressor pulley bearing failed in spectacular fashion while cruising through my hood. I felt a bit like Cheech and Chong, with the interior filled completely with white smoke that entered through the vents. Downed the windows to let it out only to find it coming out of the bonnet as well. I chose not to stop and check it out for a few reasons, and nursed it home another 7 minutes away. When I drove it in the workshop I lifted the bonnet to see smoke still pouring off the pulley. Ok. The bearing collapsed which then ran metal to metal, melted the magnet coil (from which the smoke would have come from) and when I stopped, the pulley was so hot the serp belt melted in half and just popped off! Anyway .... I pulled the manifold off took off the failed parts off the compressor and ordered replacements. While I was at it took the alternator off (brand new only 400ks ago) and regreased the needle roller bearing in the back of it (it was rumbling a bit). Pulled the tensioner off and will re-do the bearing on that too. Soooo I checked the water pump and it is not leaking, has no noise when you spin it. But it does have a small amount of freeplay side to side. My question is, has anyone elses pump had this very small sideplay? Should I just leave it alone or look at replacing the pump bearing? What have you found in the way of movement in your pump shaft? Cheers Bruce. Last edited by Bruce; 03-21-2017 at 07:29 AM. |
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03-21-2017
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#2 |
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Join Date: Jan 2017
Location: US
Posts: 233
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Re: LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
"cruising through your hood". That don't sound too good?
Sent from my XT1585 using ZR-1 Net Registry mobile app |
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03-21-2017
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#3 |
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Join Date: May 2016
Location: Whangarei New Zealand
Posts: 29
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Re: LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
[QUOTE=ssrszz4;259110]"cruising through your hood". That don't sound too good?
My hood is fine. I pulled off the motorway part to cruise through a suburb and was going to stop to grab some Subway, but before I got there the interior of the car filled with white smoke so I decided it wasnt the best idea to park up, so I put the window down, assumed cruise position (arm out the window, one hand on the steering wheel) and drove on as if nothing had happened. |
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03-21-2017
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#4 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,158
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Re: LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
I would suggest replacing the Water pump if you have play. I cannot remember if they should but I know mine started to make a groaning noise..
Another question (not completely related) I assume you Z is RHD? if so I would love to see pictures
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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03-21-2017
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#5 |
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Join Date: Jan 2017
Location: US
Posts: 233
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Re: LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
I guess that was a misread by my I was imagining the pulley cruising through the hood glad that didn't happen!
Sent from my XT1585 using ZR-1 Net Registry mobile app |
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03-21-2017
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#6 | |
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Join Date: May 2016
Location: Whangarei New Zealand
Posts: 29
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Re: LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
Quote:
The replacement parts arrived this morning - yay. Just thinking about removing the water pump while I have all the ancillaries off the front of the engine. |
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03-21-2017
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#7 |
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Join Date: Jan 2017
Location: US
Posts: 233
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Re: LT5 Water Pump - Possible Diagnosis and Spectacular Compressor Failure
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Linear Mode
