I apologize ahead of time if this is a really simple question, but I'd really like to know.

Okay, so I bought a cadillac with a 4.5 about 3 years ago and pulled the engine. I took it all apart to rebuild and put it on the engine stand. I decided to serve a 2-year mission for my church so I covered it up with like 5 trash bags and well, I've been home from my mission for about 4 months now and I took the bags off and there's some rust on the cylinder sleeves:0

I haven't yet measured the pistons for reuseability, but I was hoping to not have to get it bored out due to lack of dinero. I think I can remember spraying something on the sleeves so that they wouldn't rust like WD-40 or something before I bagged it up. I touched the rust with my fingers and rubbed a tad and it smeared off onto my fingers. What would be the best thing to clean them up with to hopefully get all of the rust off?

Thanks, and pluses are always left for helpful info,

Mike

[This message has been edited by FierosinKY (edited 01-30-2006).]

quote Originally posted by FierosinKY: I think I can remember spraying something on the sleeves so that they wouldn't rust like WD-40 or something before I bagged it up. Mike

Mike; Hind sight being perfect 20-20, you should have rub some grease on the cylinder walls for long term protection instead of the WD-40. I would suggest you get a power drill and a cylinder hone and see if that cleans them up. Use a very light lubricating fluid with the cylinder hone. Good luck. Hop

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Naval Jelly, but if there is anything you can feel, as in pits etc, you will need to at least hone.

Kevin

edit, Hop beat me by a few....

[This message has been edited by Lambo nut (edited 01-30-2006).]

You might be able to get away with honing it yourself which would probably take all the rust out, but lets put it this way, to get my block hottanked,bored .030 over and honed only cost me $180, so its well worth IMO.

Hey Olaf, but then you have to buy new pistons too, how much for those? How much performance will it give you?

What does it mean to have your block hottanked?

[This message has been edited by FierosinKY (edited 01-30-2006).]

Gibbs Penetrant

Those caddy engines are known to surface rust like that in a hurry..

Certainly a cylinder hone will clean them up, but if there is only surface rust, then a ScotchBrite with WD40 will clean up the bores.

what part are the bores?

High neighbor.

The bores is where the pistons came out of. Before you reassemble the engine the bores have to be honed. This takes the shiness off of the bores and gives the surface preperation to allow the piston rings to seat properly. You could learn how to do this your self.

The first thing you need to do is to clean the surface rust off and measure the bores to the pistons you have to see if the block needs to be bored out.

Good Luck

Ernie

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Ernie

1988 Silver GT
One owner 47000 miles.
Soon to be a 3.4 DOHC powered.

Just to answere the questions above here is what my price list looked like.
-Hottank, bore,hone block-$180
-New .030 over pistons-$108 for all 6

BTW this is in Canadian funds so it should be cheaper down south.

quote Originally posted by olaf_fiero27: Just to answere the questions above here is what my price list looked like. -Hottank, bore,hone block-$180 -New .030 over pistons-$108 for all 6 BTW this is in Canadian funds so it should be cheaper down south.

You can't hot-tank an aluminum block. It will go bye-bye and all that will remain is the cylinder liners.

quote Originally posted by olaf_fiero27: Just to answere the questions above here is what my price list looked like. -Hottank, bore,hone block-$180 -New .030 over pistons-$108 for all 6 BTW this is in Canadian funds so it should be cheaper down south.

Also, he needs 8 pistons, not 6, since his engine is a V8.

Ed

Take some oil and rub the cyl walls down..... If there are any pits and I mean any you will need to either get new liners (Gm sells liner and piston kits for around $125 bucks each) Times that by 8 = expensive. Unfortantly most machine shops will not bore that engine. The reason why is because soon as that boring machine hits the liner they will never stay in place and will move. Honing will not clean up rust pits in 4.9 liners.

The liners are also very very hard ( much harder then cast iron) Some machine shops might beable to bore the liners, But there going to be expensive

4.9 liners rust like overnight but you might be ok once you apply grease. Looking at the photo it looks like you have very very light rust, I think you might be ok.

[This message has been edited by 86fieroEarl (edited 01-31-2006).]

I'll try to clean these up this afternoon. I'll keep my fingers crossed that there aren't any pits!

Thanks for all the advice,

Mike