It was shrinkage!!!!!
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
It was shrinkage!!!!!
<In my best George Costanza voice> 
I see this when the engine is cold...
Is this normal or does it happen to anyone else...
What's the cause? Bad coolant tank cap? Once I crack the cap, I hear the hiss <pressure equalizes> and coolant flowing sound...
Thanks all... Dave Q. (CHECK UPDATE BELOW)
UPDATE #2 The new cap did the trick! Check post #30
Off center angle:
I see this when the engine is cold...
Is this normal or does it happen to anyone else...
What's the cause? Bad coolant tank cap? Once I crack the cap, I hear the hiss <pressure equalizes> and coolant flowing sound...
Thanks all... Dave Q. (CHECK UPDATE BELOW)
UPDATE #2 The new cap did the trick! Check post #30
Off center angle:
Last edited by MyVetteDream; Jun 12, 2006 at 12:08 PM.
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by yelloyello
I wonder if the hose is bad. It shouldn't collapse like that.
I thought that at first, but I found out the new hoses don't come with the metal coil inside to prevent collapsing....
How would a bad hose cause the pressure to not equalize when it cools...
I don't have heat issues, but I just want to hear what others have going on...
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by VERTC5
Bad reservoir cap. My hoses did the same until I replaced cap.
How tight is that thing supposed to be on there? I read the service manual on it, but there's no mention.... and it's hard to tell since this cap doesn't "click" once it's tight enough...
I just hand tightened... didn't turn it any harder once it stopped... Before, I tightened it a little more, was I over-tightening it?Thanks for the info... I think I'm ordering a new one today.
GM Parts Direct, here I come!
Last edited by MyVetteDream; Jun 10, 2006 at 05:50 PM.
Racer
Joined: Nov 2005
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From: St. Petersburg FL
Originally Posted by MyVetteDream
OK.... that's what I believed and a good buddy told me the same thing...
How tight is that thing supposed to be on there? I read the service manual on it, but there's no mention.... and it's hard to tell since this cap doesn't "click" once it's tight enough... I just hand tightened... didn't turn it any harder once it stopped... Before, I tightened it a little more, was I over-tightening it?
Thanks for the info... I think I'm ordering a new one today. GM Parts Direct, here I come!
How tight is that thing supposed to be on there? I read the service manual on it, but there's no mention.... and it's hard to tell since this cap doesn't "click" once it's tight enough...
I just hand tightened... didn't turn it any harder once it stopped... Before, I tightened it a little more, was I over-tightening it?Thanks for the info... I think I'm ordering a new one today.
GM Parts Direct, here I come!
Drifting
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St. Jude Donor '08-'09
Originally Posted by VERTC5
Bad reservoir cap. My hoses did the same until I replaced cap.
Sounds/looks like once the fluid cools it pulls a vacuum, collapsing the hose. The cap is probably the culprit. Of course, what do I know
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
UPDATE
I had a stealership nearby that had one in stock (only $3 more than GM Parts Direct) so I went and got it (the parts guy tried to convince me my cap was not OEM )...
Ok...so now this is a new question for me...
The new cap is apparently the right part number, but it's got a 18 PSI threshold instead of the stock 15 PSI...
I Googled it and found some info which confirmed this (Z06Vette.com), I guess GM didn't put out a bulletin, which leave me wondering if the added pressure will have a ill affect on the surge tank....
Can anyone here confirm or correct this?
Dave Q.
I had a stealership nearby that had one in stock (only $3 more than GM Parts Direct) so I went and got it (the parts guy tried to convince me my cap was not OEM
)... Ok...so now this is a new question for me...
The new cap is apparently the right part number, but it's got a 18 PSI threshold instead of the stock 15 PSI...
I Googled it and found some info which confirmed this (Z06Vette.com), I guess GM didn't put out a bulletin, which leave me wondering if the added pressure will have a ill affect on the surge tank....
Can anyone here confirm or correct this?
Dave Q.
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
18 lbs is the new replacement pressure. No ill effects at all on your tank.
Also, make sure your system is completely full. No air at all if possible.
HTH,
Robert
Also, make sure your system is completely full. No air at all if possible.
HTH,
Robert
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by LoneStarFRC
18 lbs is the new replacement pressure. No ill effects at all on your tank.
Also, make sure your system is completely full. No air at all if possible.
HTH,
Robert
Also, make sure your system is completely full. No air at all if possible.
HTH,
Robert
By system... do you mean even the surge tank?
Dave
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by MyVetteDream
Thanks Robert!
By system... do you mean even the surge tank?
Dave
By system... do you mean even the surge tank?
Dave
Not too long after I changed my waterpump, I noticed my upper hose partially collapsing after cool-down too. After a new cap, and adding more coolant mix to the level I mentioned above, no problems at all.
BTW, I think there may have been a little excess air in the system as well.
HTH,
Robert
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by LoneStarFRC
Yes, pretty much so. I keep my surge tank filled almost right up to the underside of the little "grill" you see when you take the cap off.
Not too long after I changed my waterpump, I noticed my upper hose partially collapsing after cool-down too. After a new cap, and adding more coolant mix to the level I mentioned above, no problems at all.
BTW, I think there may have been a little excess air in the system as well.
HTH,
Robert
Not too long after I changed my waterpump, I noticed my upper hose partially collapsing after cool-down too. After a new cap, and adding more coolant mix to the level I mentioned above, no problems at all.
BTW, I think there may have been a little excess air in the system as well.
HTH,
Robert
I installed the new cap... I'll take the car out and let you all know what happens... Thanks for your effort...
Drifting
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From: . Kona, HI. Orem, UT. PSL, FL
happened to me once(that i know of) sitting in my friends driveway that slopes with the hood up and noticed it. never happened again though and went away once i turned the motor over. mine was just a fluke i guess
Melting Slicks
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From: Rehoboth MA . . . NRA Life Member
St. Jude Donor '06-'07
Originally Posted by yelloyello
I wonder if the hose is bad. It shouldn't collapse like that.
I've seen a hose do this in the past and it's generally due to age or a defect in the material. How's the coolant level, this also could happen if its low?Bob
Safety Car
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From: Whittier California
Originally Posted by MyVetteDream
Ok.... Good info.... thanks for your help Robert...
I installed the new cap... I'll take the car out and let you all know what happens... Thanks for your effort...
I installed the new cap... I'll take the car out and let you all know what happens... Thanks for your effort...
My 98 and my son's 02 both have this issue with the top hose. I will be watching to see if this fixes the problem. We are both taking our cars to Andy's in about 2 weeks and I don't want to have any problems.
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From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Originally Posted by C5 4 ME
My 98 and my son's 02 both have this issue with the top hose. I will be watching to see if this fixes the problem. We are both taking our cars to Andy's in about 2 weeks and I don't want to have any problems.
And for anyone who may run into this... here's a couple of comparative shots to help avoid the shock ...
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From: The Surgeon General has warned that it's ok to smoke mustangs!
St. Jude Donor '06-'07
Yo brotha from anotha motha.....also consider This for two very good reasons....
1.) No more shrinkage
2.) Dresses up your engine bay
1.) No more shrinkage
2.) Dresses up your engine bay