Just a few questions - Chevy Impala SS Forum
 
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post #1 of 9 (permalink) Old 11-29-2005, 05:02 PM
95L99
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Hi everyone,
I've been a long time lurker, but I finally registered. I see there are plenty of knowledgeble people here, so hopefully you could help me out. My 95 4.3 has now 249k on it, and altough still running very well (knock on wood), I do wonder what the "life expectancy" is... So, seeing that an LT1 swap is fairly inexpensive and pretty easy, where in the NYC area would you recommend I pick up a used engine? Is 249k something to be scared about? The car is properly maintained, and I've encountered very little in the 2 years I've had it in terms of problems, heck, I think even the tranny is still original... So, sorry for the long post, but what insight can you give me? Places to get parts?

Thanks,
Danny
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post #2 of 9 (permalink) Old 11-30-2005, 08:22 AM
KWBaraka
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Well......249K is a lot of miles but I wouldn't be overly concerned if it's running OK [img]graemlins/.gif[/img] .

Still......it's a good idea to get an engine on-hand....or a plan in place in case you need one quick.

If I were in your position, I'd look at the following:

1. Get a new LT1 Longblock from either a Chevy Dealer or from Chad golen @ http://www.golenengineservice.com/ ...go to his Engines link and follow your nose .

2. The other alternative is to get a used LT1 and rebuild it before installing. I would not drop a used, un-rebuilt engine into my SS or 9C1. Go to http://www.summitracing.com/ and do a search for part # FEM-CSMHP765-000. This rebuild kit costs $470 but would be less if you delete the pistons from the purchase and re-use your current pistons.

3. I'd also buy a 4L60e Rebuilt Kit from http://www.700r4l60e.com/store/customer/home.php?cat=22 ......the Heavy Duty kit will be fine. That kit will come with a Transgo shift kit, too......so you'd be set for when it's time to rebuild your tranny.

Again......this is what I'd do; of course, you have your own course to follow .

Good Luck [img]smile.gif[/img] !

KW
post #3 of 9 (permalink) Old 12-01-2005, 10:09 AM
95L99
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Thanks!! Yeah, I'm not too concerned with the mileage, just wanna have more or less a plan if stuff happens. My main problem now is that Im getting 8mpg. I do drive 98% city, but still cant help but think that it cant be *that* bad. No check engine lights or anything... Just the occasional sputter for about 2 sec, which goes away after I hit the gas slightly... Any ideas? Also, does the Optispark give any warning signs when its about to die?

Thanks again,
Danny
 
post #4 of 9 (permalink) Old 12-06-2005, 07:43 PM
spazzychalk
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check for vac leaks? fuel filter? msd blaster coil? new plugs/wires, injector cleaner, k&n filter, remove unwanted exhaust parts like resonators, clean throttle body, combustion chamber, etc
post #5 of 9 (permalink) Old 12-08-2005, 02:25 PM
95L99
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Speaking of unwanted exaust parts, what could be removed? Cause the little rubber 90 degree elbow that comes off the exaust manifold on the passenger side, and seems to connect to a tube going towards the air pump keeps frying up. I've changed like five so far, and it only takes about 3 weeks and they crack, so I get a nice exaust leak... Any suggestions? The fuel filter is about 20k old, the plugs are as well, but they are Bosch Platinum, so they should last longer, no? The Opti... I have no idea. I got the car with about 200k on it, and it hasnt been touched at all.

Thanks for all help,
Danny
post #6 of 9 (permalink) Old 12-08-2005, 04:36 PM
cletus284
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20k on Bosch Platinums...they're toast. I had a set in my car when I bought it, they were total garbage. Get the '96 LT1 ACDelco double platinums, do it once, and do it right.
post #7 of 9 (permalink) Old 12-08-2005, 07:13 PM
marion
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hey 95L99 that elbow pipe that keeps burning up the cause is from what the dealership called a back fire valve the pipe that comes off of the exhaust manifold and hooks into the backfire valve then into that rubber elbow hose the valve should cost around 20 to 40 if I remeber correctly I blew mine coming down from 110 mph in my 95 hope that helped/helps
post #8 of 9 (permalink) Old 12-08-2005, 07:40 PM
spazzychalk
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can you show pics? ive never heard of it. before your reply to the question i thought he meant the heat riser. i saw a 2-3 mpg increase by gutting the cat and the chopping off the post-catr resonator and straight piping it
post #9 of 9 (permalink) Old 12-13-2005, 05:40 PM
95L99
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Hmm, so I gotta do the plugs then... As soon as it gets a little warmer... now we're at 26*F--nice and toasty! [img]graemlins/.gif[/img]
As for the elbow that keeps burning out, yeah there is a valve of some sort that its connected to, but I never knew what its name was...backfire valve, huh... do you know what its purpose is? I guess I'll go see how much it is.
Can someone tell me if there is a way to tell when the opti is on its way out as to not get stranded? As I said earlier, it hasn't been touched since I got the car 2 years and 50k ago bare minimum. Are there any special tools required to change the Opti if need be?
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