my built motor has rod knock after 20 minutes and 2 miles of run time.. primed oil system and verified via oil pressure gauge and turbo oil feed. Had great oil pressure on initial start up, still do just sluggish compared to rpms. generic 5w-30 was used with new filter that was filled before install as well. Had 6 quarts in the sump at start up and when drained. First time the motor had a load on it (pulling down the alley) and I crossed 2400 rpms it knocked.. crank pulley is tqed, pulled the trans covers, nothing loose. Everything was tqed with a torqued wrench. Dropped all the belts thinking ac idler or something but once it gets a load on it, it knocks..
The shop that built it has a reputation to keep and has done 7m's since they came out in the 80's (word of mouth from other 7m owners is not good, other motor platforms seem to hold them in high regards). They want to see the motor before any agreement for repair. This is expected and they have agreed to me being present when they tear it down (It will be torn down when I bring it, no dropping it off and coming back later). I have a build sheet 3-4' long with the work they did, what I spec'd and what I wanted done. Total was roughly $1800 which included them assembling the bottom end. Everything new except the crank and block. Aux shaft was reused but checked and had new thrust plate and collar installed.
My concerns are how far they will go to repair the motor if it was their fault. From a business stand point I foresee the minimal amount of work it requires to get it right but do NOT feel comfortable with this. I'd expect a full tear down, cleaning and starting over. Cleaning be the key here.. rings replaced, and bearings replaced at their cost.
Is this ^ expectation reasonable?
what should I expect if not?
Should it be re-ringed and honed?
Anything else that would wipe a bearing this quickly?
If this was your motor, your $4k+, your time.. would you let them do the repair and walk away confident it would last? any experience to support why or why not?
The shop that built it has a reputation to keep and has done 7m's since they came out in the 80's (word of mouth from other 7m owners is not good, other motor platforms seem to hold them in high regards). They want to see the motor before any agreement for repair. This is expected and they have agreed to me being present when they tear it down (It will be torn down when I bring it, no dropping it off and coming back later). I have a build sheet 3-4' long with the work they did, what I spec'd and what I wanted done. Total was roughly $1800 which included them assembling the bottom end. Everything new except the crank and block. Aux shaft was reused but checked and had new thrust plate and collar installed.
My concerns are how far they will go to repair the motor if it was their fault. From a business stand point I foresee the minimal amount of work it requires to get it right but do NOT feel comfortable with this. I'd expect a full tear down, cleaning and starting over. Cleaning be the key here.. rings replaced, and bearings replaced at their cost.
Is this ^ expectation reasonable?
what should I expect if not?
Should it be re-ringed and honed?
Anything else that would wipe a bearing this quickly?
If this was your motor, your $4k+, your time.. would you let them do the repair and walk away confident it would last? any experience to support why or why not?
, I'll try again over the weekend or monday. Going to pick up another HG from you in the near future.