antifreeze disappears and motor misses. What could be wrong?

Asked by Mar 08, 2015 at 03:09 PM about the 1998 Buick LeSabre Limited

Question type: Maintenance & Repair

There is no outside leakage, the antifreeze disappears and the motor misses.

5 Answers

890

You either have a cracked block cylinder wall waterjacket/passage, a blown head gasket, or a cracked cylinder head water jacket/passage, leaking antifreeze into the combustion chambers(s). If the mileage is low then its worth paying to have it repaired but call around and ask for a rough estimate from a few garages in your area. If you can do the work yourself then start with an inspection camera in place of each spark plug and look for antifreeze in the combustion chamber. The labour costs to change a head gasket are high,almost the same as replacing the engine, but weiyth no guarantee at all. If the block is cracked then there's other damage to the engine, maybe antifreeze in with the oil as well, damaged pistons, broken piston rings, or damaged cylinder heads. A head gasket might be cheap, $30-80, but the labor involved is really high. Sometimes even the cylinder head(s) has/have to be reworked at a machine shop, adding to the repair costs.

2 out of 2 people think this is helpful.
555

That was my intake manifold. The 3.8 is notorious for the intakes going bad and leaking. $350 for the whole job with my mechanic.

890

Hi. You did pretty good then buddy. All the best to you.

It turned out to be the intake manifold.

890

Hi. So it looks like you're another one with the intake manifold being the cause. There must be some kind of defect in a batch of them at the factory. At least it's not a cracked block or head. All the best to you.

Your Answer

Add photo

Related Questions

LeSabre

Looking for a Used LeSabre in your area?

CarGurus has 1,964 nationwide LeSabre listings starting at $1,500.

ZIP:

Search Buick LeSabre Questions

Buick LeSabre Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,050
#2 John Saffrahn
John Saffrahn
Reputation 1,740
#3 Austin Gaboda
Austin Gaboda
Reputation 1,400
View All

Related Models For Sale

Used Buick Park Avenue
3 Great Deals out of 427 listings starting at $2,900
Used Buick Century
868 listings starting at $1,250
Used Buick Regal
98 Great Deals out of 10,289 listings starting at $3,495
Used Toyota Camry
844 Great Deals out of 90,969 listings starting at $850
Used Honda Accord
769 Great Deals out of 88,117 listings starting at $1,150
Used Mercury Grand Marquis
25 Great Deals out of 1,849 listings starting at $1,600
Used Cadillac DeVille
5 Great Deals out of 1,623 listings starting at $2,800
Used Chevrolet Malibu
864 Great Deals out of 81,222 listings starting at $995
Used Lincoln Town Car
28 Great Deals out of 1,840 listings starting at $600
Used Pontiac Bonneville
542 listings starting at $3,699

Used Cars For Sale

2005 Buick LeSabre Limited For Sale
4 Great Deals out of 86 listings starting at $2,300
2004 Buick LeSabre Limited For Sale
3 Great Deals out of 105 listings starting at $1,500