What heads on LQ4?
The LQ4 offered a static compression ratio of 9.4:1 thanks to a combination of the 317 heads and dished factory pistons. The 317 heads featured 71-72 cc chambers and intake ports said to be modeled after the LS2/LS6 243 heads.
What causes a blown head gasket on a GM 4.3L?
You can find this tutorial in Spanish here: Cómo Probar Los Empaques De Las Cabezas (GM 4.3L, 5.0L, 5.7L) (at: autotecnico-online.com ). The most common cause of a blown head gasket is that the engine overheated because: 1) Fan clutch is not working, 2) All of the coolant leaked out of the engine and you kept driving it this way.
What kind of engine does a 2002 suburban have?
I own a 2002 Suburban with the LM7 engine in it and it’s running strong at 220k miles with virtually zero engine issues over my course of ownership. It has hands down been the cheapest car I’ve ever owned from a maintenance and repair perspective. The engine blocks are nearly bulletproof on these cars.
What to look for in a blown head gasket?
If and/when a head gasket burns or the cylinder head warps, you’re gonna’ need to check/test for 3 specific things and they are: Engine oil mixed with coolant. Exhaust/compression gases and pressures escaping thru’ the cooling system. Cylinder compression escaping from one cylinder into the adjacent one and vice-versa.
Is there an engine misfire code on a GM 4.8L?
Engine Misfire or Rough Engine Idle on GM 4.8L, 5.3L, 6.0L is becoming; more common and getting harder to diagnose. Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174.
What causes head gasket to fail on Chevy Silverado?
While there are many reasons that your Silverado’s head gasket can fail, the most common ones have to do with the cooling system causing the engine to overheat. Low Engine Coolant– If there is not enough coolant to properly cool the engine, it’ll overheat and blow the head gasket.
I own a 2002 Suburban with the LM7 engine in it and it’s running strong at 220k miles with virtually zero engine issues over my course of ownership. It has hands down been the cheapest car I’ve ever owned from a maintenance and repair perspective. The engine blocks are nearly bulletproof on these cars.
What are the symptoms of a blown head gasket?
Blown Head Gasket Symptoms: Chevy Silverado Most of the symptoms of a blown head gasket are obvious, since the way that the engine runs is usually affected. Here are some of the most common signs of a blown head gasket: Rough/Choppy Idle-When a head gasket blows, it will lower the effective compression ratio of one or more cylinders.
Engine Misfire or Rough Engine Idle on GM 4.8L, 5.3L, 6.0L is becoming; more common and getting harder to diagnose. Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174.