What causes a Pontiac 3400 engine to leak?
The intake manifold gasket failed on many 3.4 L engines and caused either an internal or external leak. An internal leak will allow the oil and the coolant to mix together. An external leak allows the coolant to leak outside of the engine. The leaks occur around the intake manifold gasket. The failures are linked to DexCool, GM’s long-life coolant.
What kind of engine does a Pontiac Montana have?
General Motors deployed the 3.4 liter engine in many of its U.S. built cars. Cars in the Pontiac line that used the 3.4L engine included the Pontiac Montana, Aztec, and Grand Am. Owners of Pontiacs with these engines reported on websites such as Car Complaints.com that they experienced coolant leaks and overheating problems with these engines.
How to bypass the PassLock sensor on a 2002 Pontiac Grand Am?
This web page will guide you through the steps necessary to bypass the “Passlock Sensor” on a 2002 Pontiac Grand Am, and keep the “SECURITY” light off forever. The steps necessary are similar on the other models listed above. There are generally only minor differences in how to get the radio out to get to the wires.
The intake manifold gasket failed on many 3.4 L engines and caused either an internal or external leak. An internal leak will allow the oil and the coolant to mix together. An external leak allows the coolant to leak outside of the engine. The leaks occur around the intake manifold gasket. The failures are linked to DexCool, GM’s long-life coolant.
What should idle and revving be on a Pontiac Grand Am?
Measure the distance that the valve is extended before installing a new valve. The distance from the idle air control valve motor housing to the end of the idle air control valve pintle should be less than 28 mm (1-1/8 in). Manually compress the pintle until the extension is less than 28 mm (1-1/8 in).
Can a GM 3.1L engine still start?
If you have one or just two readings that are under 90 PSI your GM 3.1L, 3.4L equipped vehicle will still start and run, albeit with a misfire condition. How To Test Engine Compression (GM 3.1L, 3.4L).
What causes a 3.4 L engine to leak?
The intake manifold gasket failed on many 3.4 L engines and caused either an internal or external leak. An internal leak will allow the oil and the coolant to mix together. An external leak allows the coolant to leak outside of the engine.
Why did Pontiac charge more for the 301 engine?
Of course Pontiac charged more for the 301, but that game went on for decades in Detroit. “We’ll charge you more for an engine with a bit less iron in the block” I guess I was interpreting the “they” in the headline as consumers, not GM. An alternate theory: A lot of these oddities in the marketplace can be explained by CAFE standards.
Can a Pontiac Grand Am run at high idle?
When the cooling fans turn on at 223 like there supposed to if you keep your foot in it sitting still for another Minuit at 2500 rpm it will take over by itself and run idle up to about 3500 by itself. If you turn off and restart it is fine until it gets back up in temp. Had a GM tech look at it in 35 years hes never seen one do this.
When did Pontiac stop making the Pontiac 265?
Then, in 1979-80, while Olds continued with the 260, Chevy re-entered the market with the 267, joined by the Pontiac 265 and Ford 255. The 265 was dropped at the end of the ’81 model year because Pontiac stopped mnaking its own V8s at that point.
What kind of engine did Pontiac have in 1980?
Oh, right; this was 1980-1981, the golden era for GM’s undersized and underpowered V8s. An EPA special, one assumes, until one looks at the EPA numbers. The only thing I could find was this from the 1981 brochure for the 116″ wheelbase Pontiacs (B-Body), that had EPA numbers for all three engines. The 3.8 V6 numbers (20/30).