How do i replace heater core in 1990 cutlass calais s 4 cyl 2.5L

if it is a 2.5 liter engine it is inside the oil pan. there is a huge plug on the bottom of the oil pan that has to be removed to access the oil filter. the filter then has to be pulled from its housing with a pair of pliers.

I belive that filter is inside the oil pan you can verify that by going to a parts store and asking for the replacement filter if the filter is a round air filter looking filter it's inside the oil pan . in that case you nedd a good socket and a 24" breaker bar

The temporary quick fix is to **** the window up and have a helper jam in wooden wedges inside the car, between the bottom of the window and the door slot. That will buy you some time, but won't solve your problem. The interior door panel will need to be removed and the window regulator assembly replaced. You will need a special forked tool for prying the door panel off, as well as new plastic fasteners. The old ones cannot be reused. If you want to tackle this job, first invest in a shop manual for your car, then the special pry bar (available at most auto parts stores), and new fasteners. (Count them after you remove the panel). Then remove the inner seal/sound deadener material and set aside. When you do the deed, be very careful not to cut yourself. The inner door skin has very sharp edges around the access holes. Locate and remove the nuts that secure the window regulator assembly to the inner door skin, then work it out through the largest access hole. A new window regulator is available through any GM dealer's parts counter. Reinstall in reverse order. Good luck.

most alt rebuilders will only charge a min fee to remove and rebuild cost is usually a beter way to go
some salvae yards also have removal and install service and are far cheeper than retail parts

i dont know i am having a similar problem with my 91 olds cutlass calais its a 2.5 l 4 cyl and i can drive it and it only happens a couple times a week but the RPM gauge goes crazy and the car stalls out it starts right back up but when i put it back into either reverse or drive the rpm does same thing and car stalls ive had it to 5 mechanics they cant figure it out...im hoping to get help on here

replace blower control module

Disconnect negative battery cable. Remove mounting bolts from starter. Pull it out of the hole, and down to where you can access the wires. Pay close attention to how they are put on. You want everything pointing the same direction when you're done. Remove the wires, and install new one in reverse of above.

Oldsmobile Cutlass Calais were made from1978-1991, and yes there were manual trans as well as automatic trans.

Here's some History on the Cutlass Calais.


March 1982 to replace Starfire, Lansing's version of the front-drive 101.2-inch-wheelbase corporate J-body subcompact failed to attract more than about 45,000 customers in most years -- except for 1984, when it garnered a credit­able 82,500 -- even though Olds tried most everything it could think of to sell it.

1988 the Firenza had offered all the J body styles, sporty GT and SX variants, overhead-valve and overhead-cam fours, optional V-6, and a confusing procession of price-leader and luxury models. But nothing seemed to work, and Olds gave up after '88. Firenza was no great loss, though, because 1985 brought a more-sale-able small Olds in the N-body Calais, called Cutlass Calais after 1988. Sized between Firenza and Omega on a 103.4-inch wheelbase, it bowed as a rounded, short-deck coupe in two versions: base and -- just to confuse things -- Supreme. Four-door sedans were added for 1986.
There was a lot of J-car engineering under the "modern formal" styling, and initial engine choices were the Ciera's familiar Pontiac-built four and 3.0-liter Buick V-6. Even so, customers generally liked this new bottle of old wine, snapping up 100,000-plus in the first year and better than 150,000 of the '86s -- about midway between the similar Pontiac Grand Am and Buick Skylark/Somerset.
For 1988, Calais coupes and sedans grouped into base, luxury SL, and sporty International Series (the last replacing a GT package option), but the big news was the first twin cam, 16-valve four-cylinder engine in American production, the Quad-4. Designed and built by Olds and offered as an across-the-board Calais option, it delivered 150 rather rough and noisy horses, but was claimed capable of much more.
Olds proved it by adding a tuned 180-bhp version for 1989. A more-useful option that year was a new 3.3-liter derivative of the 173-cid Chevrolet-sourced V-6. Replacing the Buick-built 3.0, it also produced 160 bhp -- and more torque than even the "High Output" Quad-4. To fill in for the departed Firenza, prosaically named Value Leader Calais models appeared for '89 with less standard equipment and restricted options but lower prices.
Enthusiasts surely shuddered when the 442 returned (sans hyphens) as a performance option for the base 1990 Calais coupe. Olds said the name now designated "Quad-4, 4 valves per cylinder and 2 camshafts."
Included in the $1667 package were the 180-horse Quad-4, five-speed manual transaxle, a specific version of Oldsmobile's FE3 sport suspension, meaty 215/60R14 performance tires on alloy wheels, full instrumentation, a cute rear-deck spoiler, and bold "442" exterior I.D. "Buff books" gave this latest 442 a lot of ink, but customers mostly gave it the cold shoulder.
Even a hallowed name on an honestly speedy little car couldn't convince many that Olds still specialized in high performance the way it had in the '50s and '60s.

olds mobile club of america should have your answer.

how do i replace a heater core in a 1992 ford f-150