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Old 03-13-2013, 09:26 PM
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350 chevy with water leak at thermostat & hose

Okay so I have a 1965 Impala SS. It has a 350 small block from a 69 camaro. I just replaced the thermostat and gasket around where it goes because of bad antifreeze leak from around the hose and gasket. I Tryed using forma gasket. Still leaks. Car is running very hot can't drive it and don't want her to rot :/ deffinitly not selling her if she stops running though. Any suggestions.?

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Old 03-13-2013, 09:47 PM
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Welcome to Hotrodders

I edited the thread title. Please place some information in the title instead of HELP! . This helps the membership and the search function on the board.

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Old 03-13-2013, 10:21 PM
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Quote:
Originally Posted by Chevylover65ss View Post
Okay so I have a 1965 Impala SS. It has a 350 small block from a 69 camaro. I just replaced the thermostat and gasket around where it goes because of bad antifreeze leak from around the hose and gasket. I Tryed using forma gasket. Still leaks. Car is running very hot can't drive it and don't want her to rot :/ deffinitly not selling her if she stops running though. Any suggestions.?
So is it leaking where the thermostat housing meets the intake or where the rubber hose goes onto the housing.
If it is where the housing meets the intake then either the gasket is no good, the housing is cracked due to being tightened with the thermostat not seated or something else that is keeping the housing from sitting on the intake.
The thermostat should sit down into the intake.
Is it an aftermarket housing.
Have you tried it without the thermostat to see if it seals. It is possible if it is one of the cheapo aftermarket housings that it may be hitting on the thermostat and not seating. This is a long shot but worth looking at.
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Old 03-14-2013, 12:28 AM
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Just a few things Ive run into over the years

Over tightening the bolts can pull the housing out of shape. use a torque wrench, 15-20ft lbs is not very much and very easy to over torque

Full chrome housings will leak unless you sand/mill the chrome of the gasket surface.

make sure both intake and housing surfaces are completely clean of any gasket or glue before you try to install new parts.

Check the intake gasket surface for gouges from previous cleanings.

dont over tighten your hose clamps either.
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Old 03-14-2013, 04:34 AM
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It's leaking from where the rubber house meets the housing.
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Old 03-14-2013, 06:55 AM
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Quote:
Originally Posted by Chevylover65ss View Post
It's leaking from where the rubber house meets the housing.
****,.... Did ya put a hose clamp on it...

There's gotta be a hole in the hose or in the housin', if it's clamped, 'n still leakin'...

Last edited by 68NovaSS; 03-29-2013 at 11:29 AM.
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Old 03-14-2013, 10:55 AM
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Well I do have it clamped. So I hope there isn't any holes in the housing. It's just like the hose or the gasket isn't right. Cause there is a little gap maybe the width of a needle between the gasket and hose in the front.
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Old 03-14-2013, 11:18 AM
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Is the housing pitted from rusting where the hose connects?

I recently had this very problem and it was as simple as I didn't tighten up the hose clamps tight enough. I tightened them with a screw driver and that simply wasn't enough. I put a socket on a little quarter inch ratchet and easily tightened it a bit more, no more leak. We aren't talking about muscling it, a hose clamp will break pretty fast, it isn't real strong but it will take a lot more than you would think. At least the larger clamps, a little one for a fuel line will break easy even with the screw driver. But those large ones on the rad hose, they are damn strong. A good snug with the ratchet cured my leak.

Brian
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Old 03-14-2013, 11:20 AM
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No no rusting at all that's my problem. I just don't see any reason for the leak. I will try that when I get back in, thanks.
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Old 03-14-2013, 01:41 PM
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Ive bought 5 or 6 thermostat goose necks in the past few years that had pin holes in the goose neck from cheep Chinese castings!!!! Mr. gaskets were the worst for this LOL You could look inside and actually see the hole and the casting flaw (brand new out of the package) but outside you couldn't!! It would leak and look like it was the hose! I even replaced the hose on the first one till I Noticed the flaw after replacing the hose and it still had the leak!

Just a thought of what I ran into in the past! It was annoying as HELL every time it happened But now I look for that problem.

Jester
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Old 03-17-2013, 03:28 PM
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Thanks guys I appreciate the help. I have FINALLY got the leak to stop.
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Old 03-17-2013, 07:32 PM
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Well don't keep us in suspense, how did you fix it?

Brian
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Old 03-19-2013, 10:59 AM
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Thermo leak

I've had the crappy chrome "Goose necks" leak a few times, even after I removed them and sanded the gasket surface flat.
By any chance, is the antifreeze puddling up between the first two (L) intake bolts, if so tighten your intake bolts!
I enjoy the original style Chevy smallblock engines... Someone asked me that if I could change one thing, I said... "Put the distributor up front"... But that's it!
OK, how about the ability to remove the timing chain cover w/o pulling the oil pan down a few inches (Yes, there's an aftermarket "Easy-remove" cover).
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Old 03-19-2013, 02:26 PM
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Well don't keep us in suspense, how did you fix it?

Brian
I would like to know TOO

Jester
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Old 03-22-2013, 04:19 PM
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The goose neck was completely pitted. I replaced it and the leak has stopped. But she is still running hot. Any suggestions.? I'm changing all spark plugs and getting new wires.
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