I have a 93Z with 240K on the clock. The motor runs strong, does not smoke on start up or when giving it gas. Who among you would rip into this motor and install a new cam package?

 

I would at least do a compression check...and go from there...but do yourself a favor and get the engine freshened up...or save for a new shortblock...

 

I would recommend a new short block or atleast freshing yours up before installing a cam. Especailly an original short block with 240,000 miles.

 

Not a chance in the world.

 

Absolutely NOT! That's wayyyyy too many miles to do that kind of work. That engine is living on borrowed time. If you take it easy with it and dont beat on it it may last another 60k or more.....but you better be easy on in!
Mike

 

I beat the crap out of this motor and it keeps on running. I have done a compression check and the motor is in GREAT shape. Like i said, no hesitation, no smoking (except for the tires).

What are the dangers of installing a new cam in this block?

 

Do it, then when it breaks build it again. You are do for a rebuild anyways, prob overdo.

High rpms likes to kill factory bearings, I spun 2 rod bearings with a cc306 spinning to @ 6500 with 120k on the clock. Cam had been in @ 10k.

 

jsetzer - < You read my mind. I was thinking of just throwing upgrades to the motor until it breaks.. then when it does i'll rebuild the block and really hammer it.

Someone told me that you have to be careful about removing a cam thats been in the motor for a while because the cam lobes and the bearing surfaces have become matted.. is that true?

 

Well, they wear on each other. The bearings will very likely be thin and not fit a new cam well. And while I say go for it, also realize that anything you throw in there could potentially get destroyed when the motor goes.

By some miracle my cc306 made it out alive. Everything was shot, even the spider gear that drives the oil pump. But the cam looked brand new and checked out with the machine shop.

Just saying, realize that if you do, and a rebuild comes (which it will) you may have to buy parts again that you just put into the motor. I kept my block, intake and heads from the stock motor. Each recieved porting/boring etc. Everything from the pan to the injectors I replaced on the new motor.

 

Also, consider doing it all at once and doing it right. If you want to stay cheap your crank, rods may be fine. New set of cheap pistons, .030 over bore, new bearings, head, cam and you would have a pretty nice NA motor you could trust for a while. Your current shortblock I wouldn't trust to go to the grocery store

 

<jsetzer>
I have a 40% sponsorship by a local machine shop so i am not worried about the rebuild. I already have a set of pully ported heads with upgraded springs and valves waiting on me. I am going with a LT4 Hotcam which i understand is not a radical upgrade over the stock one.. with new timing chaing and valve springs.

 

NO!!! Go bigger lol.
With an m6, you won't know you have a cam. The cc306 was small. I don't think the gm847 is a monster,but it puts me right where I need to be. Already a little large for n20.

 

195k on mine with the cc306 and bolt ons, 12.4 @114 on a crappy 1.99 60', she still rips

 

lol hell noo

 

ZX -- thanks for the words of encouragement I am sure the motor will be just fine. My builder told me that the cam bearings are pretty durable and dont actually wear that much with age. He said besides.. if it blows i'll rebuild it for you <----------- How can you argue with that