S44

Working on an S44? Read This First

The Saab 900 second generation, internally designated S44, is the car most people call the "new" 900. It ran from 1978 to 1993 across both the original and Turbo variants, and it shares almost nothing with the later 9000 except the badge. If you are looking at one right now, or you already own one and something is making a sound it should not be making, this is the practical rundown. I have owned three of them over the years and worked on probably twice that many through friends and local shops. They are solvable problems most of the time, but only if you know where the pain points actually sit. There were really two distinct engine families in the S44 body shell. The early models carried the B201, a 2.0-liter four with either a carburetor or Bosch K-Jetronic fuel injection. Later, Saab switched to the B202 in 1987, which was essentially the same block but updated with better flow and reinforced internals. The Turbo versions used the B201T or B202T with the distinctive up-over-down cam layout that defines every Saab four from this era. The real issue with these engines is not the blocks themselves. The blocks are generally solid if they have not been overheated. What dies is the cylinder head gasket area, specifically around the exhaust ports on the turbo models. I found this on a '86 Turbo I picked up for a project. The car ran fine on cold starts but began losing coolant after about twenty minutes of driving. No external leaks anywhere. I pressure-tested the system, checked the radiator cap, swapped the thermostat, and still got coolant loss with no visible leak. Eventually I pulled the head and found the exhaust port sealing surface was compromised. Not cracked, just worn down enough that the stock head gasket could not maintain a seal under boost and heat cycling.

The workaround that actually works is installing an overshield or multi-layer steel head gasket designed for these engines, combined with resurfacing the head to spec. Saab eventually released an updated head gasket part number for exactly this problem. You will find it listed as a reinforced or overshield gasket in most Saab parts catalogs. The cost is modest. Skipping the resurfacing step and just swapping the gasket is where most people go wrong and end up back in the same place six months later. The non-turbo K-Jetronic models have a different set of gremlins. The fuel injection distributor wear points are real, and the idle mixture screws on the PE valve tend to get gunked up with old fuel varnish. I had one where the car would not idle below 1,200 RPM no matter what I adjusted. Turns out the idle air passage in the throttle body was completely blocked. Cleaning it with carb cleaner and a appropriate brush fixed it immediately. The S44 carbureted versions have their own issues around the choke mechanism and float levels, but those are easier to diagnose because you can see and access everything without removing major components.

The Timing System Nobody Talks About

Every S44 Turbo uses Saab's characteristic timing system where the camshaft drive runs through a complex arrangement of gears and shafts inside the timing cover. The oil seal at the front of the camshaft is a known failure point. When it leaks, oil finds its way into the timing cover and eventually out past the crankshaft seal area. You will see oil weeping from between the engine and transmission on the driver's side, and most owners blame the rear main seal when the real culprit is the front cam seal letting pressure build up inside the timing cavity. I spent an afternoon on a '88 Turbo chasing an oil leak that seemed to come from the rear main. Everything looked wet down low. I cleaned the entire engine bay, ran the car, and watched. The oil was tracking down from the timing cover area, not the rear of the block. Replacing just the front cam seal and the crankshaft front seal at the same time cost about forty dollars in parts and two hours of labor if you already have the right tools. Replacing the rear main seal requires dropping the transmission, which is a six-hour job minimum. Knowing the difference saved someone I know about eight hundred dollars in unnecessary labor.

Electrical Gremlins and the Wiring Loom

The S44 electrical system is straightforward in design but fragile in execution. The main wiring harness routes along the firewall and down the driver's side of the engine bay, and the connectors in that area suffer from heat cycling and moisture intrusion. The most common failure is in the main connector near the fuse box, where pins corrode and create intermittent loss of power to the fuel injection system or ignition pickup. What makes this tricky is that the symptoms are random. The car will start fine, drive normally, then die at a stoplight with no warning lights and no trouble codes. The K-Jetronic system does not use an ECU in the modern sense, so there is no check engine light to guide you. You just have to trace the power feed. I keep a test light clipped to the main harness connector when diagnosing these events. If the power drops while the connector is wiggled, you have found the problem. The fix is cleaning the pins with contact cleaner and applying dielectric grease, or replacing the connector housing entirely if the terminals are corroded beyond reuse. The later B202 engines added an electronic ignition component that introduced a new failure point. The crankshaft position sensor, located inside the timing cover near the crank gear, fails intermittently and usually returns after cooling down. This is why some cars stall on hot days and run fine once they cool. The part itself is not expensive, but accessing it requires removing the timing cover, which means dealing with that oil seal situation I mentioned earlier. It is always a good idea to replace the timing cover seals whenever you are inside that area, even if the old ones still look intact.

Body and Rust — The Real Killer

Engines and electrical issues are manageable. Rust is not. The S44 body is remarkably susceptible to corrosion in specific areas. The rear wheel arches are the primary zone, followed by the floor pans along the sills, the trunk floor around the spare tire well, and the lower A-pillar area where the cowl meets the dashboard seal. I have seen cars with perfect engines and restored interiors that were totaled by structural rust in the lower rocker panel area. Those panels are boxed sections, and once water gets inside, you cannot properly clean or treat it without cutting the panel out. When inspecting an S44, the first thing you should do is check the rear wheel arches with a flashlight and a magnet. Paint thickness tells you nothing about structural rust underneath. Lift the carpet in the rear wheel well area and check for soft spots. Tap the metal with a screwdriver handle. Solid metal sounds sharp. Rust sounds dull and the screwdriver will sink in. Do this before you care about anything else on the car. A sound mechanical example with rusted structural panels is far more expensive to fix than a rough mechanical example with clean floors and arches. The trunk area deserves special attention. The spare tire sits in a pan that collects water from the rear window seal and the body seams. Over time, this creates a slow pool that eats through the trunk floor from the inside out. I found a '90 Turbo with a completely rotted trunk floor that was hidden under a new carpet someone had laid down. The tire well itself was still solid, but the structural sill underneath was gone. Replacement requires welding in new metal, and honest restoration work there is not cheap.

Parts Availability and Sourcing

Most S44 parts are still available through specialized suppliers. SAABEast, Saab Parts Direct, and the Swedish car parts channels in Europe all carry the essential items. Engine internals for the B201 and B202 are surprisingly accessible because these engines were produced in decent numbers and share components with other Saab platforms. Suspension parts, body panels, and interior trim are harder to find and significantly more expensive. A used interior can run anywhere from five hundred to two thousand dollars depending on condition, and new pieces are often discontinued. The biggest frustration is finding complete documentation. Saab's original service manuals exist but are scattered across different years and model variations. The B202 engine differs from the B201 in several key areas including the timing chain tensioner design and the oil pump pickup. Using a B201 manual on a B202 engine will get you most of the way there but will miss critical details. If you are doing serious work, the separate service manual for the B202 is worth the purchase price.

What to Expect if You Commit to an S44

These cars are not difficult to live with if you approach them realistically. They are not reliable in the sense that a Corolla is reliable. They require attention, they leak things, and some components will fail on a schedule. But the failures are predictable and the fixes are well understood. The community around these cars is still active, which means advice and replacement parts are available even for obscure items. My recommendation for anyone considering an S44 is to prioritize body condition over mechanical condition. A rusty S44 is a financial black hole. A mechanically rough S44 with solid bodywork is a project you can solve with time and money in a known quantity. The cars that fall apart financially are the ones where the owner discovers structural rust after investing thousands in an engine rebuild. That sequence happens more often than you would think. If you have a specific problem with an S44 and want to dig into it, the details matter. The year, the engine type, the market the car was originally sold in, and what has already been worked on will change the diagnosis significantly. These cars are consistent enough that once you understand the patterns, most issues become routine. They are not mysterious. They are just old Swedish engineering with a specific set of known weaknesses that are easy to overestimate if you have never seen one in person.