Make payments with PayPal - it's fast, free and secure! registry | CVN on Facebook | tech | news | email login Click here for ADTR! Make payments with PayPal - it's fast, free and secure!

Welcome to CVN - Your Panther platform headquarters!

Custom Search

Topic Options
#2177516 - 11/08/10 07:39 AM Losing coolant
hlbly Offline

Registered: 04/21/03
Posts: 327
Loc: Knoxville TN
Friends, I hav an unusual problem with my 1997 CVPI with 182.5k.
After I moved the car from my garage after a few moths of being parked, to check anti-freeze, I found the overflow tank completely dry. I added coolant to the full mark and ran the engine until warmed.
Last week, I drove the car to Virginia (about 300 miles. Again, the tank was bone dry and required more coolant to fill. These observatons:
1. Temp gauge is completely in normal range.
2. Car has never overheated during my ownership (80k).
3. No coolant odour in passenger compartment.
4. No obvious leaks in pass compartment or engine bay. Engine still has plastic intake manifold but intake valley is completely dry.
5. Heater output is very cool and temp control setting makes no difference.
I have always felt fairly capable of fixing anything on my car, but I'm stumped on this one. Any suggestions of where to begin?
1997 Crown Victoria P71 (former UMaryland security).
2008 Crown Vic P71 (former Sault St. Marie, Ontario PD).

#2177552 - 11/08/10 09:08 AM Re: Losing coolant [Re: hlbly]
stalag Offline
Over the Hill

Registered: 03/29/09
Posts: 3414
Loc: Columbus, OH
Head gasket may have failed.

Stalag;___________Just for Rizzo I am posting this in my sig. Coolants
2001 Lincoln Town Car Cartier L, 1997 Mercury Grand Marquis (extinct)
On my LTC the following mods/upgrades were added. Heinous motorsport control arms, Command Automotive SD-1 rotors (these rotors can no longer be obtained), Calipers by Goldlinebrakes.com in silver with Hawk HPS pads (now running Ford OEM), MSD COP's. MZT is also applied with programming from BOC. j-mod is now done. Final rebuild of transmission done by Gearstar.

#2177697 - 11/08/10 03:22 PM Re: Losing coolant [Re: stalag]
BigMerc96 Online   confused

I know nothing
Grand Poobah

Registered: 06/05/10
Posts: 14371
Loc: I can see Detroit from here!
I wouldn't jump right to head gasket just yet. the heater is cool because the coolant is low, now the question is where is the coolant going.

There are many places coolant can leak, radiator, hoses, heater core, intake manifold, and of course, the head gaskets. I would highly suspect that manifold if it is still the all plastic one and it has never been changed before. The two most common places for them to leak is around the thermostat, and around the heater hose fitting.

at that age and mileage, I'd also suspect that the radiator hoses are probably in need of replacing, along with the hoses that run to the heater core. I could also be the heater core its self, but you say you don't smell coolant in the cabin.

Pull your plug wires and make sure the boots and plug-wells are dry, when the manifolds crack, they like to fill the spark-plug wells with coolant, especially numbers 4 and 5.

If it were a head gasket, you would likely have coolant/oil mixing, and/or white, sweet smelling exhaust smoke.

1997 Town Car Cartier ~134k miles, 70mm TB, Ported Plenum, Gutted Airbox, Mechanical Fan Delete, Contour E-fan Retrofit, Dual exhaust with Magnaflows, rear cat delete, MSD Ignition, KYB Gas-A-Justs, Marauder/HPP rear sway bar, P71 front bar, air ride reinstated, Blinker Mod, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit.. Smashed 1/13/13....I fixt it..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown
Originally Posted By Becker34
CVN: Ask us what time it is and we'll tell you how to build a clock. And what parts to use. And then dissect the procedure. grin

#2178294 - 11/09/10 12:30 PM Re: Losing coolant [Re: BigMerc96]
hlbly Offline

Registered: 04/21/03
Posts: 327
Loc: Knoxville TN
Thanks, a comperhensive diagnosis is scheduled for next week and I'll share the reaults on this thread.
1997 Crown Victoria P71 (former UMaryland security).
2008 Crown Vic P71 (former Sault St. Marie, Ontario PD).

#2178297 - 11/09/10 12:41 PM Re: Losing coolant [Re: hlbly]
Mileaway Offline
Posting Addict

Registered: 10/06/05
Posts: 16824
Loc: Sacto. Calif.
chck the heater hoses & connections.
2000 P71 Interceptor orig. equip.near mint parchment int.& carpet 155,000 mi. 3.55 rear

Little Anthony: That's all the television there is.

#2178777 - 11/10/10 07:47 AM Re: Losing coolant [Re: Mileaway]
White Falcon LS Offline

Posting Addict

Registered: 01/01/02
Posts: 18793
Loc: Earth
As stupid as it sounds, have you checked the radiator cap? I had a very similar problem, where 3/4 of the reservoir would be empty after every drive. If I didn't add coolant, it would be bone dry the next day. Did a pressure test, and there were no leaks so I replaced the cap with an RS-527, and that solved the issue. But about four days later, I had a leaky intake manifold gasket, in one of the coolant passages, which would leak coolant into the intake valley.

Would be good insurance to replace the manifold, heater core hoses, radiator hoses and that hose that runs from the back of the water pump. Silicone hoses are a good investment I would say.
Lucifer: '01 GCC Spec Grand Marquis GS

In Memory of Ned Nuss, Rick Richardson and Matt (2vmodular)

#2196285 - 12/09/10 10:39 AM Re: Losing coolant [Re: White Falcon LS]
hlbly Offline

Registered: 04/21/03
Posts: 327
Loc: Knoxville TN
Coolant loss apparently was leaking intake manifold gaskets. We decided to replace the all-plastic mnifold with the new type (aluminum cross-over) since the manifold had to come off anyway.
Heater problem appears to be blend door actuator.
1997 Crown Victoria P71 (former UMaryland security).
2008 Crown Vic P71 (former Sault St. Marie, Ontario PD).


Moderator:  BigMerc96, Chevyguy, KayTar, Liquid 
Who's Online
16 registered (BigMerc96, Amos_Moses, BlackVic_P71, AWilli, disston, 2004_p71, 3 invisible), 84 Guests and 67 Spiders online.
Key: Admin, Global Mod, Mod
Shout Box

Email Login
EMail Login Name
 New users, sign up!
Top Posters (30 Days)
BigMerc96 269
Blakat 256
a_d_a_m 237
Chaplian 190
garndreadz 150
Black_Sunshine 147
s33k3r 134
bigROC209 121
Moby_Vic 120
Ezbok58a 116
Member Spotlight
Member Since: 09/23/07
Posts: 5383

Copyright 2000-2015 by Crownvic.net and Steve Spaulding. All Rights Reserved.
The photographs, graphics and data contained in this Web site are the properties of the contributors, or Crownvic.net and may not be used without expressed written consent.
Crownvic.net is not affiliated with the Ford motor company.

Happily consuming the fuel saved by Prius owners!