 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / September 2007Part 3: Troubleshooting overheating prob
UPDATE: Well, I think we might be close to the problem. To refresh everyone's memory: the overheating (1995 Z28) came on suddenly. I did the following in an attempt to remedy the issue (listed in order of replacement): * Replaced thermostat with a Stant SuperStat heavy duty unit * Replaced radiator cap and flushed system, using Delco-spec antifreeze * Replaced water pump with brand new AC Delco unit After these replacements, I would start the car and upon warm-up, the temp gauge would continue to climb into the red. As a reminder, this water pump is shaft-driven from a gear off in the timing cover. Look here: http://www.9c1.com/technical/LT1_rebuild/ar99928.htm ... and here ... http://www.gmhightechperformance.com/tech/0506htp_lt1_high_mileage_reliable_buil d/install_pictures.html OK, fast forward to today. I took the thermostat housing off and removed the thermostat and had my son start the car up while I took a video. Watch here: http://s5pro.homelinux.org/wpump.avi Without stating what my opinion might be, I'd like to see what all the experts have to say. > UPDATE: > [quoted text clipped - 22 lines] > Without stating what my opinion might be, I'd like to see what all the > experts have to say. Ouch. No pump action at all! Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) the only other thing i would do is replace radiator  SignatureRickottman http://www.automotiveforums.com maybe check to see if the upper or lower rad hoses are not collapsed on the inside. check to see if the radiator is plugged. On any GM product I had when the heat guage goes over 3/8th of the way over that is normal. If it goes half way over it is over heating. >Without stating what my opinion might be, I'd like to see what all the >experts have to say. The waterpump isn't turning. Steve B. > >Without stating what my opinion might be, I'd like to see what all the > >experts have to say. > > The waterpump isn't turning. > Steve B. Thanks Steve and Mike !! I never considered that the pump would not be spinning, especially considering that it's shaft driven. When I told my son to crank the engine, I couldn't believe my eyes, so I asked him to do it a couple more times. So, basically, I'm getting zero circulation. Obviously, the water pump drive gear is hosed. I'll be curious to find out why the shaft isnt spinning the water pump. I'll post back the results after the tear-down. >Obviously, the water pump drive gear is hosed. I'll be curious to find >out why the shaft isnt spinning the water pump. I'll post back the >results after the tear-down. Please do. You have my interest peaked on this one. Steve B. > >Obviously, the water pump drive gear is hosed. I'll be curious to find > >out why the shaft isnt spinning the water pump. I'll post back the > >results after the tear-down. > > Please do. You have my interest peaked on this one. > Steve B. I removed the front plate on the water pump, which reveals the water pump's impeller. This absolutely confirms that the pump/impeller isnt being turned by the engine: http://s5pro.homelinux.org/impeller.avi Hell all ... Well, I've removed the water pump ... I can turn the water pump with the coupler attached to the water pump's splined shaft. However, the coupler will not slide and engage tightly to the splined driving shaft on the engine side, which of course means the splines are stripped. Here's the video version: http://s5pro.homelinux.org/drive-gear.avi |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.