thebufenator

iTrader: (2)

I just did a WOT run to 80......and afterwards I hear a clacking sound coming from the engine bay. All the gauges look good.

I pull over, shut it down, restart, same thing.
pop the hood.....and it looks like the noise is coming from under the T-stat.

So I am thinking opti or water pump. I was able to drive the car fine home......rpm's seem fine. Around idle it started acting weird, kinda bucking alittle like it was about to die from too much load, so I kept the rpm's around 700 and it was fine.
Drove it home, now its cooling down.

any thoughts?

thebufenator

iTrader: (2)

Here's a video.
http://s2.photobucket.com/albums/y2/...t=DSCF0562.flv

there is a strong smell of gas when it is running, and little puffs of white smoke out the exhaust. Its also running really rough.

When I put a screwdriver against the engine block, I can feel the grinding that is making the noise......but when I put the screwdriver against the top of the water pump, it is 10x worse there.

Leads me to think its something up front.

any help?

I really dont know what I am doing.

-PEPE-

iTrader: (10)

hard to diagnose over the net, could be the waterpump, timing chain sounds like at a guess, is the waterpump dripping out of the weep hole on the bottom of it? It might be your chain and it's throwing timing off & running rough.

borninatransam

iTrader: (4)

i was thinking timing chain as well. i just dont see a water pump causing it to run rough even if the impeller went out in it. but since the water pump is driven by a gear thats turned by the timing chain i could see the issue sounding like thats where it lies.

-PEPE-

iTrader: (10)

exactly what I was thinking, little timing gear actually sits in a bearing that is held in by a plate with two screws, my bearing was shot which caused gear wear from the chain. This was 4 yrs ago when I was just running a stock engine with an 847.

thebufenator

iTrader: (2)

So should I order a new chain........or what?
I am gonna start taking it apart later today.

Do you think I need new gear sprockets?
Also, should I get the LT4 chain, or the GM heavy duty set?

thanks.

-PEPE-

iTrader: (10)

I'd tear into it first see what's going on then order your timing set. The GM heavy duty set is just fine, LT4 would be fine too, it's a pretty stock setup the GM set is more than enough.

thebufenator

iTrader: (2)

Any pointers on what order i should tear it down?
I've never done this......

-PEPE-

iTrader: (10)

I'll find you a writeup on it. basically though you will pull your belts, radiator (easier access), hoses, crank dampner/pulley, waterpump, optispark, then loosen your oilpan about 3/4" in the front (have to loosen almost all your bolts), pull timing cover. I'll stop there and recommend you get a Hayes manual. It's not that bad of a job really but you still need to pull the gears, chain, etc, etc, R&R any bad parts and put her back together.

-PEPE-

iTrader: (10)

as promised, this should with a manual get you going.

http://www.gmhightechperformance.com...eliable_build/

thebufenator

iTrader: (2)

alright, thanks.
How many hours do you think this will take?

-PEPE-

iTrader: (10)

4 - 6 if you've never done it.

thebufenator

iTrader: (2)

well, I was looking at timing sets, and the LT4 sets wont work w/o me changing alot of stuff, since I have a 93.
Argh.

While I have the front apart, how much harder would it be to put a cam in?

-PEPE-

iTrader: (10)

pull the intake, rockers, pushrods, lifters, replace all of that with good stuff including your cam. google shoebox camaroz28.com he has a good "howto" website and there are quite a few other good ones out there with purdy pictures and step by step guides.

thebufenator

iTrader: (2)

I dont think I have the money to change all that......

What about the timing kits? Do you know what I can use since I have a 93 engine?
I found a comp cams kit, but its $510.....kinda expensive

ulakovic22

iTrader: (12)

Elec. w/p and true roller. Should be about the same as replacing the timing chain and you won't ever have to worry about it again.

thebufenator

iTrader: (2)

explain?

ulakovic22

iTrader: (12)

You could use a standard SBC chain instead of the LTx style since you won't need the w/p gear......that is if you change to an elec. w/p. Also there will be less load on the front cam bearing from driving the w/p all the time.

chavez885

iTrader: (12)

looks like the eurotails broke the LT1,doh!

MEAN LT1

iTrader: (2)

I would find out what wrong with it first and then start getting parts.