Question about 1998 GMC Sierra

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Leaky muffler type sound from engine when under a load

Same sound as a muffler with a hole in it, only coming from driver's side of engine upon acceleration and climbing a hill, under a load. almost like an exhaust leak from a donut, but hard to locate standing at engine.

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Check for a leaking manifold gasket or cracked manifold. If it is a front wheel drive car there may be a flexible bit near the engine to allow the engine to move in the mounts . This bit of flexible exhaust is known to crack under the brading.

Posted on Nov 16, 2014

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Posted on Jan 02, 2017

bunnydawg
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SOURCE: Leaking antifreeze fluid from under the engine.

most likely leaking from the water pump which will need to be replaced

Robert

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Posted on Feb 01, 2009

  • 1118 Answers

SOURCE: Leaking antifreeze fluid from under the engine.

might be a freeze plug leaking, or heater hose. there are three freeze plugs on each side of engine and two in back of engine. most likely if any of them are leaking, it will be the one behind the starter on the far right rear of engine block. they have also been known to leak around the front and rear of intake, where intake, head, and block meet.

Posted on Feb 01, 2009

  • 1 Answer

SOURCE: Rough Idling and slow accelaration

Maybe have your exhaust checked for plugged catalytic converter

Posted on Jun 16, 2011

  • 1 Answer

SOURCE: my van wont do over 35 mph

check cat.converter for blockage

Posted on Dec 05, 2012

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2001 Dodge Caravan SE Suddenly got VERY loud


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Ok i have a loud noise coming from under the car but it is really load in side the car to i looked under it and saw that a pipe was broken i think it gos to the muffler


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I can feel friction while driving above 15 mph.


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Engine Trouble


Your getting backfires? hmm interesting. Seems like your engine is getting flooded and either purging it out of the exhaust or burning it all at once or both (backfire). Sounds like a leaky engine valve to me.There again the bluish smoke indicates to me thatyou are leaking oil somewhere- bad rings or head gasket maybe, which could cause a loss of compression which could also cause your problems.That rattling from the left/rear side sounds like a bad muffler try kicking the muffler (not hard though) next time you walk by it.

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