Vehicle
Pontiac Grand Am
The high-volume compact that preceded the G6, and the car most likely to be the oldest Pontiac somebody is still running. The 2.4 Quad 4 and the 3.4 pushrod V6 both have well-known head-gasket and intake-gasket histories, and the 3.4's lower intake gasket in particular produces coolant loss into the oil with no external sign — worth establishing before reading anything into an overheat or misfire code.
Generations
-
Fourth generation 1985–1998
The Quad 4 era, an engine with a well-known head-gasket history that presents as coolant loss with no external leak.
- Body styles
- Sedan · Coupé
- Platform
- GM N-body
- Engines
-
- 2.3 four-cylinder — LD2 · petrol · 112–135 kW (150–181 hp) · Quad 4
- 2.4 four-cylinder — LD9 · petrol
- 3.1 V6 — L82 · petrol · 251 Nm (185 lb-ft)
- 2.0 turbo — LT3 · petrol · 123 kW (165 hp) · 237 Nm (175 lb-ft)
- 2.5 — petrol · 67–82 kW (90–110 hp)
- 3.0 V6 — LN7 · petrol · 93 kW (125 hp) · 203 Nm (150 lb-ft)
- 3.3 — LG7 · petrol · 119 kW (160 hp) · 6-cylinder, US market 1992-1993
- Transmissions
- 5-speed Isuzu manual · 5-speed Getrag manual · 3-speed THM125 automatic · 3-speed 3T40 automatic · 4-speed 4T60-E automatic
- Drivetrain
- Front-wheel drive
-
Fifth generation 1999–2005
GM N platform; the 3.4's lower intake gasket leaking coolant into the oil is the failure to rule out before believing an overheat or misfire code.
- Body styles
- Sedan · Coupé
- Platform
- GM N
- Engines
-
- 2.2 Ecotec — L61 · petrol · 203 Nm (150 lb-ft)
- 2.4 Quad 4 — LD9 · petrol · 112 kW (150 hp) · 210 Nm (155 lb-ft)
- 3.4 V6 — LA1 · petrol
- Transmissions
- 5-speed Getrag F23 manual · 4-speed 4T40-E automatic · 4-speed 4T45-E automatic
- Drivetrain
- Front-wheel drive
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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