1995 Buick Riviera ?`s

So this is my concern i have a supercharged engine but it has a rod knock i want to kno if i can put a series 2 N/A engine since on the 95 that was option . To my understanding is that it has the same computer so what do you guys think the N/A is 10 tines easier and ch.eaper to find in my area

Are you sure its rod knock or is it maybe the supercharger coupler worn and making noise. Which sounds like rods.

Hint Z slip the SC belt off and start car (Do NOT run it long with belt off) does the noise change/go away?

Yeah im sure i lost oil pressure and put new rod bearings its actually running good ive put in about
10,000 miles since but i would really like to fix the problem .

I would say if you did the machine shop work you were supposed to when you replaced those bearings then it's not unrealistic to think you have a supercharger coupler noise not rod noise. However if you did not then we would not be surprised to find that you have rod knock.

I actually did it at home thinkinking it was a.permanent fix but 20 miles later i got a light knock its not to bad but i would like it to be gone .. do youthink that it would be sible to swap in a N/A engine instead i dont mine less hp on my rivi im buying a buick regal soon for speed

did you already shop for a replacement engine? An SC engine might not be as much $$ as you think, given that if you put in an NA engine you are going to have a, well, PCM headache and that there's more than one SC engine out there.

The other thing - if you shop around I would not be surprised to find a replacement SC Series I engine for under (perhaps well under) $1,000. They were in a lot of 90's GM cars that were not driven very hard, like the Olds 88 LSS and Buick Park Ave.

AndI would still slip that SC belt off and see if the knock stays. Just for grins. Won't take but a moment...

Ive been calling different places for a couple months and the ones i found were over 1400 with over 14000 miles to me thats alot of money for the mileage i would glady pay if they had low miles.. and i will do the supercharger belt im starting to think that the knock kight be something else .. is it normal do you think for a engine to last 8 months with a rod knock being a daily drive and a abuse daily driver lol im young with a heavy foot

That would be unlikely, especially on a supercharged motor. I think you should take Alberts advice and slip off the sc belt. It only takes a couple of minutes to do.

bigdave wrote:

That would be unlikely, especially on a supercharged motor. I think you should take Alberts advice and slip off the sc belt. It only takes a couple of minutes to do.

Yeah, in my experience the failing alternator bearing sounds like a spun main bearing, and the supercharger coupler failing is mistaken for all kinds of problems - one way to get a SC buick or olds cheap was to find one where the SC bearing was going because it sounds so much like the chuckle of a knocking rod.