Engine Knock

[ToddF]

today my engine started knocking thought it might be a lifter but I don't think so. I have only pulled one valve cover and that valvetrain seems okay. So my question is what kind of costs should I expect with a replacement engine It is an 04 indmar 350. what about pulling engine and rebuild costs

 

Thanks

 

Todd

[BraceMaker]

have you done all the "freebees" oil/fuel/codes?

[ToddF]

Runs fine No noise until 1200 rams then gets pretty loud Haven't tested compression yet, just trying to get a feel for worst case scenario

[ToddF]

Rpm not ram

[oldjeep]

Well. I'd pull the other valve cover and look there too. Fire it up with them off.

Could also be your damper plate breaking.

 

Rebuilt long block is around $2500 plus shipping from michiganmotorz . Figure another $500-1000 in various small pieces and might as well stuff while it is apart. No idea on labor, free if you DIY.

[19skier]

Check compression. I had experience with cross-firing between cylinders twice due to head gasket leak between cylinders on 350's. Both times they presented normal operation until engine started doing some work. Both times at #8 n #6 cylinder. Hope yours is that easy!

[eleeski]

Check the damper plate on the flywheel. I had springs come loose and cause a similar problem. Easy fix. But you do have to split the transmission apart from the engine.

 

Eric

[Orlando76]

I'd be surprised if it's the dampener with no noise on the low side. Last February I changed my LH 351 with a reman from Summit. I think I have $3600 in it total and that was with a new dampener and professional install. My carb and dizzy were new less than a year old, manifolds were original and checked good. I'm not familiar with 350's, is it still GM or Vortec design? I'm sure there will be a significant difference in cost. I would verify cost of a new reman and availability, pull the other valve cover and if top end checks out ok and it is in fact on the bottom.... I would run her until she goes. Maybe years from now.