95 k1500 started knocking. HELP!!

[95chevyk]

I have a 95 k1500 stepside with a 350 all stock as far as I know.

It has a 5 speed manual transmission.

 

 

So I bought this truck 2 weeks ago and it started knocking yesterday, it doesn't do it when it's cold it only starts to knock once it gets to operating temp and if I accelerate it will do it until it hits about 2000rpm's

It does it in neutral and in gear and it doesn't matter if the clutch is in or out. It was also running very rough so I replaced the spark plugs and it doesn't run as rough but its still running alittle rough.

Spark plugs were coal black when I took them out.

I also just noticed alot more fuel smell in the exaust but it doesn't have cats so i may have just not noticed it before now.

Any ideas would be greatly appreciated

Thank you.

 

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[O_J_Simpson]

Sounds like someone loaded it up with Motor Honey and sold you a time bomb. I would cut my losses and sell it now. More Motor Honey is optional.

[Jeep_Comanche17]

i would put some lucas in it and see if that helps. another trick is take a long screwdriver and put the tip on top of the heads and move it along while having the handle on ur ear. if the knocking is a rod u will more than likley be able to tell which cylinder it is. do u know how many original miles are on the motor?

[badfish81]

Just rebuild and bore it. Those trucks are easy to work on. I got a 94 and it is simple as hell. The machine shop will have to bore it out but if you can remove the engine yourself then you can probably rebuild it yourself. That transmission is pretty valuable by the way. Usually around 800 to 1200 used.

 

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[95chevyk]

I've replaced an engine before in my old 89 so I don't think I would have trouble with that, but I have never rebuilt one.

How hard is it to do?

Do you have a general idea of the cost of the machining and the rebuild?

[badfish81]

You could probably just buy a replacement and swap it easier and cheaper but I like to do things the hard way I guess. Depending on the parts you use, the thoroughness of the rebuild and the services you take advantage of at the auto machine shop, you could spend between 800 to several thousands of dollars. Get a service manual and see which route you'd be comfortable with. There's a million ways to skin your particular cat and you just got to do what works best for you.

 

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