noises

MAZDA B2600
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F18PILOT5
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i drive a mazda b2600i 4x4 manuel truck. recently i started it and it started a werid sound. from a former izuzu rodeo i had before i blew a rod from that. i have recently changed the oil. i put in mobil 10w-40 with a STP oil filter. it has 3/4 oil on the dip stick right now and still has the knock. when i rev it up it gets faster. i have ran it somewhat hard. on the highway i would be crusing for about 45mins at 3000 rpm thats just the way the trans is made i guess. it does have a crack on the top of the radiator and got hot one night but still in the normal zone. i put more coolant in and just steam came out. i just dont know what is the cheapest way to fix it. its a daily driver car.
May 7, 2010 at 10:33 AM
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MHPAUTOS
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Hi there,

Thank you for the donation.

I fear that the knock is a failed bearing, what you describe is constant with a bearing knock, i would like to know what the oil pressure is cold idle, hot idle and hot at 1500RPM.

mark (mhpautos)
May 7, 2010 at 9:36 PM
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F18PILOT5
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it just stoped after i let it sit for about 5 hours. i reved it up to make sure and it hasnt been doing anything since. maybe something to do with my radiator. it needs to be replaced.
May 14, 2010 at 2:04 PM
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MHPAUTOS
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This will not be a radiator problem, more than likely something like a pressure relief valve acting up, have this checked or at least get a oil flush done as the system may be a bit sludgy.

Mark (mhpautos)
May 14, 2010 at 6:31 PM