Thread: antifreeze on intake manifold
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02-10-2004 08:34 AM #1
antifreeze on intake manifold
Last year I put a new Edelbrock performer intake manifold with a 600 cfm Carb on my 37 chevy truck with a 305 engine bored .060 over. I have been having problems trying to find a leak that leaving antifreeze on my intake manifold. I re-torqued the bolts thinking they had come loose. Still leaks. I put new radiator hose on. still leaks. Put new. Put new thermostat housing on but it still leaks. What happens is that after I drive it it will sit for hours and nothing happens. I've watched it for 8 hrs. and couldn't see a leak. The next morning the manifold would have about an ounce of antifreeze sitting on the front of the intake. I've thought maybe the water pump was shot but I can't find any leakage there. Any ideas? BartKeep smiling, it only hurts when you think it does!
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02-10-2004 12:01 PM #2
Chevy 37; I'm not sure how cold it is where you are but it sounds like it's trying to freeze or expand, I mean you said it's sitting for 8 hours and no leaks. You might have a bad intake manifold Gasget letting anti freeze up thru a bolt hole and puddling on top of the intake. Do you have a heater hose that's in that area? I would look for pin holes first. If it's none of these, the intake could have a hair line crack in it. Let use know what you find. the last guy found it was comming up thru a bolt hole from a bad intake gasget that had rotted in between a water port and the bolt hole.
Vegas
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02-10-2004 04:16 PM #3
Thanks Guys for the info. When it warms up here I'll take my truck out of storage and try what you stated. I don/t think its the manifold or gasket but maybe the new thermostat housing I put on.Keep smiling, it only hurts when you think it does!
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02-10-2004 04:29 PM #4
Did you put one of those cheap chrome thermostat housings on it,if you did you will need to sand the chrome off where it comes in contact with the manifold. I read in a magazine somewhere the chrome wont allow it to seal properly. Jeff
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02-10-2004 07:13 PM #5
Chevy37; Was it leaking before you changed it ,or just after.That should tell the story with that. Let us know what you find, thanks.
Vegas
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02-11-2004 02:04 PM #6
Vegas It started leaking after I put the manifold on. After 1 week I retorked the bolts but it still leakedKeep smiling, it only hurts when you think it does!
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02-11-2004 02:30 PM #7
Chevy 37; I take it that It was used. It's probably like Streets said. You need to have it checked and maybe they can fix it? Shave it or some thing. Then use a thicker intake gasget on it. Please let me know what you find. I'm curious now.
Vegas
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02-11-2004 03:57 PM #8
water leak
If I were in your shoes I would get a cooling system pressure tester[ wonder if this is one of the tools that "Auto Zone" loans? I would put the system under pressure cold and watch it. I bet you find out exactly whats happing. JoeJoe
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02-11-2004 04:08 PM #9
HE!HE!HE! That's one heck of a BIG ECHOOOOOOOOOOO!!!!!!
VegasLast edited by vara4; 02-11-2004 at 04:10 PM.
Getting closer on this project. What a lot of work!
Stude M5 build