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Leaking Coolant on '02 Impala 140,000 miles

13 messages,  Last post on Jul 04, 2009 at 12:25 PM

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#1 of 13 Leaking Coolant on '02 Impala 140,000 miles by 02impala24 Jan 15, 2008 (6:00 pm)
There seems to be a leak in my coolant, but only when the car is turned on, any suggestions on what the problem could be?   I've came up with either a leak in one of the lines or the head gasket. Replies to this message: jnt (Jan 15, 2008 6:13 pm) 02impala24 (Jan 15, 2008 6:37 pm) nosirrahg (Jan 15, 2008 7:20 pm) and 2 more... wheresmyvette (Jan 16, 2008 8:46 pm) 02impala24 (Jan 19, 2008 7:00 pm) ike12 (Feb 16, 2008 3:28 pm) bobbyv23 (Jul 04, 2009 12:25 pm)
#2 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [02impala24] by jnt Jan 15, 2008 (6:13 pm)
Replying to: 02impala24 (Jan 15, 2008 6:00 pm) It could be your water pump. At 140K miles, the water pump seal could be worn out and started to leak.   My 3.4L van just had the water pump replaced couple weeks ago. The coolant sprayed out on the side near water pump.   If you hear squealing sound (coolant on the belt) when first started the car, then it is indicative of water pump leaking. Water pump fix is cheaper than the gasket replacement (intake gasket for the notorious 3.4L V6, especially on GM minivan: virtually every van has this gasket problem).   jt Replies to this message: 02impala24 (Jan 15, 2008 6:37 pm) nosirrahg (Jan 15, 2008 7:20 pm) 02impala24 (Jan 16, 2008 11:59 am) and 1 more...
#3 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [jnt] by 02impala24 Jan 15, 2008 (6:37 pm)
Replying to: jnt (Jan 15, 2008 6:13 pm) So you're saying that the head gasket isn't the problem? I havent heard any squealing though, I'll definetly look for that next time I start it. Thank you. Replies to this message: nosirrahg (Jan 15, 2008 7:20 pm) 02impala24 (Jan 16, 2008 11:59 am) jnt (Jan 26, 2008 7:47 am)
#4 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [02impala24] by nosirrahg Jan 15, 2008 (7:20 pm)
Replying to: 02impala24 (Jan 15, 2008 6:37 pm) FWIW There was also a recall (though it may not have been called that) on some of the early 3.8l Impalas... I know my 2000 was involved, but I don't remember how far forward the problem stretched. This was due to a composite intake manifold that was used, which tended to warp and allow coolant to leak out. I'd never see coolant on the ground or anything, but I could smell coolant and took it in and they found the leak. Several months to a year later GM issued a notice and I got reimbursed for the repair (which was $900). Replies to this message: 02impala24 (Jan 16, 2008 11:59 am) jnt (Jan 26, 2008 7:47 am)
#5 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [nosirrahg] by 02impala24 Jan 16, 2008 (11:59 am)
Replying to: nosirrahg (Jan 15, 2008 7:20 pm) The only thing is, is that i do see the coolant that has leaked out. I've read about the water pump sealants are a common problem? Replies to this message: jnt (Jan 26, 2008 7:47 am)
#6 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [02impala24] by wheresmyvette Jan 16, 2008 (8:46 pm)
Replying to: 02impala24 (Jan 15, 2008 6:00 pm) call your dealer and see if your part of the coolant leak recall for the implalas. i cannot remember the year model for the recall but i think that it was the 02's. Replies to this message: 02impala24 (Jan 19, 2008 7:00 pm)
#7 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [wheresmyvette] by 02impala24 Jan 19, 2008 (7:00 pm)
Replying to: wheresmyvette (Jan 16, 2008 8:46 pm) Do you think that hooking up the on-board diagnostics thing (OBDII) would tell me whats wrong?
#8 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [02impala24] by jnt Jan 26, 2008 (7:47 am)
Replying to: 02impala24 (Jan 16, 2008 11:59 am) Any service station should be able to pin down the leak if it is obvious like you mentioned. They could do the pressure check, visual inspection of all hoses and lastly putting dye in the coolant and let you drive around a while. That thing will help pin down the problem as far as where the leak is.   On high mileage vehicle, water pump seal would break down and cause the coolant leak out from weep hole (purposely design to show this problem). If that is the case, the auto shop would be able to determine that by looking at the weep hole for any water residue (small leak)   Before you sink $200 for the water pump replacement, at least check the following things on your own:   1. The cap on the coolant recovering plastic reservoir : is this close? 2. The radiator cap: Is this locked properly. It has marking on it telling user the locking position.   The coolant leak could be caused by :   1. Hose crack (low cost) 2. Radiator leak (moderate cost) 3. Water pump leak (moderate cost) 4. Intake manifold leak (most costly) 5. Radiator cap leak (low cost) 6. Other?   jt
#9 of 13 impala by 02impala24 Jan 26, 2008 (8:43 am)
Thanks for the reply I'll definetly look into that.
#10 of 13 Re: Leaking Coolant on '02 Impala 140,000 miles [02impala24] by ike12 Feb 16, 2008 (3:28 pm)
Replying to: 02impala24 (Jan 15, 2008 6:00 pm) with the impalas that have the 3.4L V6 they almost NEVER blow a head gasket. they ALWAYS blow intake gaskets. i have replaced about 4 doz in the last year. I work for an auto garage. If you under the throtle body where the trany and motor bolt together ill bet you will see a puddle of coolant. i have a 01 impala with 176k and my intake gaskets were replaced.

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