NC State Guy
Cadet
- Joined
- Feb 11, 2009
- Messages
- 19
1980 Merc 470 3.7L serial#5520896
I have read extensively on the temp/overheating threads in these forums before posting.
I have been concerned that my engine was running hot the last couple weeks...Gauge reads 210-220 under load. Changed sender and tried it with 2 different gauges--same results. Sender and gauges are compatible according to teleflex cust serv.
The laser Temp reading near the temp sender is about 180F.
i changed the rad cap to one that has a thermom built in it; it reads 160-170F under load, albeit I dont think the coolant was leaving the reservoir going to recovery tank yet... so fluid may not have touched the therm.
I will do the ohm testing procedure for the sender/gauge tommorrow with the multimeter, and check my wire connections throughout, but my question is how common is it that a new sender and gauge don't give an accurate reading? do they usually need resistance added?
thanks
I have read extensively on the temp/overheating threads in these forums before posting.
I have been concerned that my engine was running hot the last couple weeks...Gauge reads 210-220 under load. Changed sender and tried it with 2 different gauges--same results. Sender and gauges are compatible according to teleflex cust serv.
The laser Temp reading near the temp sender is about 180F.
i changed the rad cap to one that has a thermom built in it; it reads 160-170F under load, albeit I dont think the coolant was leaving the reservoir going to recovery tank yet... so fluid may not have touched the therm.
I will do the ohm testing procedure for the sender/gauge tommorrow with the multimeter, and check my wire connections throughout, but my question is how common is it that a new sender and gauge don't give an accurate reading? do they usually need resistance added?
thanks