well looks like i got some work to get this mopar to run at normal temps. problem is gradually heats up until coolant overflow.had it dynoed and a tune put on it so were good on A/F ratio and timing. before the tune it would get hot at lights and slow traffic then cool off once in the wind. after the tune it now just gradually rises until pukes coolant. probably about 15 minutes of country road driving. 26" three core factory rad with 6 blade 18" clutch fan (NEW ). shroud is factory. The motor is a new build maybe 50 miles on it. 440 4spd. slightly hotter cam than stock other wise factory specd motor. im guessing 190 t stat? and stock 6 vane pump. Problems i see that need addressed.
1. shroud to radiator has air gaps all around it. need to seal with foam tape
2. fluid looks cruddy, guessing from the dyno pulls it got some junk stirred up. brown rust color. was green before tune.
3. with rad cap off and engine up to temp coolant flow looks inadequate to me?? its moving but im not sure what typical NORMAL flow should look like?
4. big problem here , the fan/shroud combo is not doing ****.it only pulls air thru the very center of rad. every where else its pushing HOT motor compartment air back thru. see video, paper is flopping wrong direction. May need some input on this one. here is what i see. fan blade is 3/4 out of shroud and not centered. there is also a 1" to 1.5" gap from edge of fan blade to edge of shroud. almost like a bigger fan could go in but i think a 20" would hit shroud? heres what i plan to do.
5. drain and remove rad. block flush
6. check thermostat and possibly install a 180
7. pull pump and identify number of vanes and insure no problems
8. seal shroud to rad for air tightness.
9. install a 7 blade 18.5 fan and keep the clutch
10. how about some input on # 4 problem.
**note** cant get iphone 7 vid to upload,any tricks/short cuts
got it.
