temp sender reading too low
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=12219
Printed Date: May-04-2024 at 6:59am
Topic: temp sender reading too low
Posted By: ac505
Subject: temp sender reading too low
Date Posted: October-22-2008 at 11:07am
The temp of my engine does not seem to rise above 125F even though I have a 160F thermostat.
To date I've changed the stat twice, metered the wiring between the gauge and sender, checked voltage to the sender, replaced the sender and gauge and I still get the same problem. The boat does have a heater take off on the manifold so the stat is not in direct contact with the block any more. See link photo.
http://www.pinkbike.com/photo/2001387/
I can't for the life of me figure out what the problem is, I've used a laser thermometer and get a block temp of around 140F near the manifold and 150F on the block just beneath the cylinder heads. My question is, could the sender in it's new position account for the 30 - 40F drop in reading or do I have some other cooling problem with the engine??
Thanks for the help.
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Replies:
Posted By: Brktracer
Date Posted: October-22-2008 at 11:28am
Is water constantly flowing past the sender and through the heater? Which direction is the flow?
I'm sure you've thought about this already...just trying to help!
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http://www.correctcraftfan.com/diaries/details.asp?ID=3180 - 1976 Nautique
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Posted By: 8122pbrainard
Date Posted: October-22-2008 at 11:43am
Interesting that this same problem just came up on PN. I as well as another feel that moving the sender away from the block is the problem. The easy spot for the heater supply is a block drain but this water may not be as hot as the water at the intake manifold. Some manifolds may have two ports so I'd look at that too so the sender doesn't need to be moved.
Here's the thread: http://www.planetnautique.com/index.php?name=PNphpBB2&file=viewtopic&t=12757 - adding a heater thread on PN
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/diaries/details.asp?ID=1622" rel="nofollow -
54 Atom
/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique
64 X55 Dunphy
Keep it original, Pete
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