how do i check the valve lifters in a 1988 cougar v6

Asked by Aug 04, 2015 at 08:10 PM about the Mercury Cougar

Question type: Maintenance & Repair

rockers are tapping and they are not adjustable

3 Answers


They are probably hydraulic lifters and over a period of time sludge blocks the orifices. To clean them you need to remove the rocker arm and .... if you are lucky they will come up and out with a magnet ... however since your car has seen a few years and perhaps mileage ,,,you may need to borrow a tool to get them out because in addition to sludge some lifters "mushroom" at the top and are very difficult to pull through the opening

Best Answer

If you are about do for a oil change leave out one quart of oil and add Lucas Engine Oil Stabilizer or if just did a oil change remove one quart of oil from engine then add Lucas the tap will go away.


If lifters are tapping I would check the oil pressure with a mechanical gauge first. It would be unusual for them all to start making noise at once due to sludge.

Your Answer

Add photo

Related Questions


Looking for a Used Cougar in your area?

CarGurus has 200 nationwide Cougar listings and the tools to find you a great deal.


Search Mercury Cougar Questions

Mercury Cougar Experts

#1 lisagayle
Reputation 2,200
#2 Tom Demyan
Tom Demyan
Reputation 740
#3 Jessica Cornelison
Jessica Cornelison
Reputation 600
View All

Related Models For Sale

Used Ford Mustang
459 Great Deals out of 45,641 listings starting at $1,999
Used Chevrolet Camaro
219 Great Deals out of 30,798 listings starting at $1,217
Used Mercury Grand Marquis
31 Great Deals out of 1,808 listings starting at $2,250
Used Chevrolet Corvette
120 Great Deals out of 20,599 listings starting at $3,000
Used Ford Thunderbird
19 Great Deals out of 1,069 listings starting at $6,499
Used Dodge Charger
398 Great Deals out of 28,096 listings starting at $1,988
Used Dodge Challenger
169 Great Deals out of 24,123 listings starting at $8,500
Used Ford F-150
2,178 Great Deals out of 206,277 listings starting at $1,499
Used Chevrolet Impala
578 Great Deals out of 31,558 listings starting at $799
Used Pontiac Firebird
10 Great Deals out of 725 listings starting at $3,875
Used Pontiac GTO
7 Great Deals out of 452 listings starting at $6,000
Used Honda Civic
634 Great Deals out of 88,620 listings starting at $995
Used Chrysler 300
401 Great Deals out of 19,882 listings starting at $1,000
Used Chevrolet Monte Carlo
20 Great Deals out of 1,404 listings starting at $1,995

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.