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#1
05-31-2008, 12:12 PM
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Let's see if it solves (or helps to solve) the problem. Take measurements before adjusting; if larger than .050" or so (especially if MUCH larger), your coolant flow is undoubtedly suffering.
george
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"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum |
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#2
06-22-2008, 11:21 AM
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I've been battling a hot running 68 400 for a couple of years. Checked my impeller clearance last year per this post and found that I had a stamped impeller with losts of clearance. Bought a reman pump with cast 8 fin impeller (11-bolt) and adjusted the clearance to .060 with only a slight improvement in temps. Found out my radiator (4 row Harrison) was in poor shape so I am in the process of changing it out with an Alumitech. I pulled the pump again just to re-verify my impeller spacing and noticed that I have quite a bit of crud accumulated on the divider plate isolated to the area from just below the outlets where the o-ring bushings connect to the bottom of the plate. Is this accumulation of crud a symptom of a problem I should be concerned about or normal. I also noticed the pump had a rust line starting from about 1/2" above the impeller shaft to the top of the pump. Again is this normal or another sympton of a larger problem. Sorry for the long post but I'm working on it this weekend and this problem is wearing me down.
Thanks Jim
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R68GTO 1969 Camaro COPO 427 "RAT'S NEST" |
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#3
06-25-2008, 03:51 PM
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George, I told you I would post and do my part in keeping the thread going. To all I have a 66 GTO, 19" hd 7 blade stock fan , no shroud , 4 row radiator and have been running up to 220 after just 30 minutes in Arizona's dry heat !!! This while temps were in the low 90's. Pulled the water pump and found a steel impellar and a rusted with holes divider plate. Picked up a shroud from PY, an 18" 6 blade steel fan and a cast impellar pump from napa. already got the clearance in place. Just have to paint and get all back together. I will update back hopefully next week with good news.
Thanks Tom/ Fremd High Grad!!
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70 RA3 Judge 4spd Orbit Orange 66 389 GTO Tri Power 4spd Montero Red 77 400 TA Auto Starlight Black 02 Trans Am WS6 Auto Sunset Orange |
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#4
06-25-2008, 06:13 PM
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You go guys!
More important than keeping the thread going, is to get them Pontiacs cool! Just remember to do as George suggested on page 1, "THINK"! And please post results for others to key off of. Charles Page 1, Posts 4, 15, 16 & 17 |
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