Freeze plugs gone bad on a Mercury Marquis 94 model

Asked by GuruTRRKD Jul 15, 2018 at 01:34 PM about the 1994 Mercury Grand Marquis LS Sedan RWD

Question type: Maintenance & Repair

I've been told by a diagnostic
done by a local mechanic that I
have to freeze plugs that are
missing on my 1994 Mercury
Marquis can you tell me if it is
true that the that the drivetrain
must be pulled out or the
transmission must be removed
and four bolts cut to replace two
freeze plugs on the side of the
motor. Please help

2 Answers

103,435

A missing freeze plug would cause you to lose significant amounts of coolant. As soon as you added more coolant you would see it dump out to the ground. A freeze plug is pressed into a casting hole on the engine block. The hole opens to the water jacket. (There can be several holes with freeze plugs, depending on engine.) If you lose the plug, you immediately lose all coolant in the engine. You would not be able to drive far before overheating and any attempt to refill coolant would be a waste of time until the plug was repaired. SOME plugs can be reinstalled without removing engine, some are impossible to reach without pulling motor. If you don't trust this mechanic's opinions then take it to another shop for another opinion. Keep in mind, driving it with missing freeze plugs will cause an overheated and potentially ruined motor.

1 people found this helpful.
10

I got a 92 Grand Marquis l think that my freeze plugs are bad cause every time I put antifreeze in it's leaks on the ground can't drive far cause my motor overheat

1 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,860
  • #2
    Trippmeister
    Reputation
    5,150
  • #3
    Bob Beaman
    Reputation
    3,890
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
309 Great Deals out of 13,933 listings starting at $1,712
Used Toyota Camry
60 Great Deals out of 1,072 listings starting at $3,995
Used Chevrolet Tahoe
14 Great Deals out of 896 listings starting at $12,900
Used Honda Accord
55 Great Deals out of 995 listings starting at $2,000
Used Buick LeSabre
1 listing
Used Chevrolet Corvette
27 Great Deals out of 1,082 listings starting at $15,000
Used Ford Mustang
58 Great Deals out of 1,366 listings starting at $4,995
Used GMC Sierra 1500
128 Great Deals out of 6,516 listings starting at $3,975

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.