temp sensor and coolent leak.

[blueagletalon]

i have been chasing my temp sensor problem since i got the boat. i have rang out the one wire going to it. i have replaced the sensor and the guage. i followed my manual on troubleshooting . im lost, i can not find anything wrong. so im writing you guys for help.
my coolent leak seems to be comming from the water pump area. i did notice that all the bolts are kinda loose. so im going to re torque them tomorrow night. has anyone had problems with bolts working them self loose? if so what kind of locktight cand i use.

my boat is a 1987 thomson 185 cutlass. with the 3.7 mercruiser 470 motor.

 

[Don S]

Re: temp sensor and coolent leak.

Exactly what is your problem.

 

[blueagletalon]

Re: temp sensor and coolent leak.

the temp sensor will not work

 

[Bondo]

Re: temp sensor and coolent leak.

Ayuh,... Is the gauge Powered with 12V,..??
Is the Sensor properly Grounded,..??

The water leak is a sign of potential catastrophic failure....

 

[Rocky_Road]

Re: temp sensor and coolent leak.

Did anyone use teflon tape on the sending unit threads?

The sensor uses it's pipe threads (no tape needed) to make the ground it requires. Weak ground= no work!

Happy boating!

 

[stonyloam]

Re: temp sensor and coolent leak.

my coolent leak seems to be comming from the water pump area. i did notice that all the bolts are kinda loose. so im going to re torque them tomorrow night. has anyone had problems with bolts working them self loose? if so what kind of locktight cand i use.

my boat is a 1987 thomson 185 cutlass. with the 3.7 mercruiser 470 motor.

Take a close look at the lower starboard side of the engine water pump. There is a small weep hole there. Is the coolant coming from there? If so, you need new camshaft water pump seals. Common problem with the 470's. If it is, read this it will help you understand what is going on: http://www.sterndrives.com/470information/470coolantleakrepair.html

 

[blueagletalon]

Re: temp sensor and coolent leak.

i was reading the link and it says that i have to have some special tools. now cant i use a 3 point jaw puller? plus do i really have to pull the engine?

 

[stonyloam]

Re: temp sensor and coolent leak.

i was reading the link and it says that i have to have some special tools. now cant i use a 3 point jaw puller? plus do i really have to pull the engine?

Not sure on the puller. You do not have to pull the engine if you have room to get the harmonic balancer off.

 

[blueagletalon]

Re: temp sensor and coolent leak.

ok i do believe i have the room. now i have to order seals.

 

[blueagletalon]

Re: temp sensor and coolent leak.

is there any good places to buy them from.