More on this diesel noise at part throttle
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More on this diesel noise at part throttle
A co-worker and I were talking about my 2001 Ram 1500 van and I was telling him about this noise my van makes at part throttle which sounds like a diesel engine. The PO said the noise started after replacing the head gasket(s) and when I pulled the doghouse off and revved the engine up past idle, the noise seems to be coming from either the valve cover(s), bell housing area or rear of the engine.
He owns a Ford F-150 and says his truck makes the same noise. His mechanic said it was the camshaft phase sensor and not to worry about it. Now that he mentions it, I have heard of engines with VVT making this diesel noise. Not just Fords but other makes.
I Googled this to see if the Magnum 3.9 engine used such a system. So far I haven't turned up anything. Does it? Is there anything the mechanic could have screwed up when doing the head gasket replacement to actually cause such a noise?
I did replace the serpentine belt, tensioner pulley and idler pulley and go rid of that cricket noise under the hood and the engine is much quieter but that diesel noise at part throttle is still there.
The other idea could be the torque converter. But does those devices usually just give up the ghost at once? All torque converters and automatics I've seen usually just die without warning.
The transmission shifts fine and doesn't slip. Also past part throttle the noise goes away and when I take my foot off the gas.
He owns a Ford F-150 and says his truck makes the same noise. His mechanic said it was the camshaft phase sensor and not to worry about it. Now that he mentions it, I have heard of engines with VVT making this diesel noise. Not just Fords but other makes.
I Googled this to see if the Magnum 3.9 engine used such a system. So far I haven't turned up anything. Does it? Is there anything the mechanic could have screwed up when doing the head gasket replacement to actually cause such a noise?
I did replace the serpentine belt, tensioner pulley and idler pulley and go rid of that cricket noise under the hood and the engine is much quieter but that diesel noise at part throttle is still there.
The other idea could be the torque converter. But does those devices usually just give up the ghost at once? All torque converters and automatics I've seen usually just die without warning.
The transmission shifts fine and doesn't slip. Also past part throttle the noise goes away and when I take my foot off the gas.
