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Temp sender location? - went fishing (post #15)

AJs72K5

AJs72K5

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The Edelbrock intake I put on the BBC has coolant ports at all 4 corners. Right now I have both senders in the back two (by the dizzy) to get them out of sight. Curious...does it matter? Is any particular location more accurate for the ECM and gauge?

Thanks!
 
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I've heard that in the heads is supposed to be a more accurate. That location is closer to the combustion chamber, will change more quickly based on engine load.
 
If you insist on keeping it in the intake rather than the driver side head I would move it to the front of the intake closest to the t-stat housing.
 
I agree with the article... every OTHER app I've ever seen has it in the ps of the intake up by the therm, or close by... probably why you see the CTS's put there..

every boat manny (merc, crusader, etc), my old Mopars, etc has the sender there.... I'm guessing GM stuck it in the head for harness reason's probably.....
 
Oh boy... the driver's side NPT plug (aluminum) seized in the intake when unscrewing it. Ended up having to drill it out and cut it out. However, in the process of cutting it out with a Dremel cabide bit, the bit pulled out and rolled down into the water jacket of the driver's side head :yikes:

Gonna run a magnet down it tomorrow to see if I can fish it out. If I can't, how screwed am I?
 
That stinks. Are they aluminum heads? I wouldn't run aluminum plugs for just that reason.

I'll let the experts comment, but maybe try pulling another plug lower and see if the water flowing out might grab it for you while it drains? Maybe even a spray hose down the thermostat opening to get lots of water pressure.

I'd for sure try the magnet first though.
 
bp71k5 said:
That stinks. Are they aluminum heads? I wouldn't run aluminum plugs for just that reason.

I'll let the experts comment, but maybe try pulling another plug lower and see if the water flowing out might grab it for you while it drains? Maybe even a spray hose down the thermostat opening to get lots of water pressure.

I'd for sure try the magnet first though.
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Yeah, they're aluminum heads. Hoping a magnet will do it.
 
If you cannot get it out I would not be too worried about it. It is not getting past the thermostat, if it does its not going through the radiator. It has to go through both of them before it gets to the water pump.

Oh wait BBC guess it could go through the bypass if you are running one.

You could always pull out a freeze plug and get it that way.

I would not worry to much about it.
 
bp71k5 said:
That stinks. Are they aluminum heads? I wouldn't run aluminum plugs for just that reason.

I'll let the experts comment, but maybe try pulling another plug lower and see if the water flowing out might grab it for you while it drains? Maybe even a spray hose down the thermostat opening to get lots of water pressure.

I'd for sure try the magnet first though.
Click to expand...

NEVER install an iron plug into aluminum or your chances of getting it out are pretty slim. You always want to install the like material when using plugs. Also it is always a good idea to install using some form of thread sealant (teflon tape or teflon paste).
 
4X4HIGH said:
NEVER install an iron plug into aluminum or your chances of getting it out are pretty slim. You always want to install the like material when using plugs. Also it is always a good idea to install using some form of thread sealant (teflon tape or teflon paste).
Click to expand...

I assumed he had aluminum heads which is why he had an aluminum plug, but had to ask. I know the reason but I just never had good luck with aluminum fasteners or any size of shape.

Maybe I misunderstand...did the threads fuse to the head or did you just round out the hex key hole trying to remove it? I assumed the threads were the problem but reading again makes me not so sure.
 
bp71k5 said:
I assumed he had aluminum heads which is why he had an aluminum plug, but had to ask. I know the reason but I just never had good luck with aluminum fasteners or any size of shape.

Maybe I misunderstand...did the threads fuse to the head or did you just round out the hex key hole trying to remove it? I assumed the threads were the problem but reading again makes me not so sure.
Click to expand...

The seized plug was in the intake, Brian. I used aluminum plugs and teflon paste but still had some small coolant leaks. I guess when I tightened them down again, it mucked up the threads.
 
Went fishing tonight into the intake and driver side head coolant jacket. First cast, pulled back this little f***er. :woot:

Now I just need to run a tap thru NPT threads on the intake to clean them up. That'll happen this weekend.

IMG_1962_zpsjjt1jxii.jpg
 
Can you also shove a shop rag under the hole from the thermostat opening to catch any shavings? A shop vac might help get any the grease didn't catch?
 
both viable certainly too.... probably not much to worry about, it's doubtful there'll be much in the way of shavings anyway... throw in it's the coolant system, not a cylinder too...
 
Yep. Should be minimal shavings. Just chasing the threads to clean them up and prevent any leaks. I'll grease up the tap though.
 
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