Hey to all, I'm having some issues with my 430 engine ..I'm getting a rattling sound when I hit the gas. In park I don't hear it, but driving I can hear it, when I hit the gas....what would b the cause of tht, and what would b some remedies to correct the issue...Thanks all info is appreciated...
That pinging is detonation caused by the gas octane being too low, compression being too high, timing being set too high, carbon build up on the pistons etc. I would avoid driving it until this is addressed. Are you using the highest octane fuel available at the pump?
Yes I'm using 93, u mentioned compression, timing,carbon build up...whts the correct timing, n compression tht needs to be with this engine..us the carb out of the question...is there a gd any not expensive way to get this fixed. Thanks..
It could be as simple as backing off on the timing. U gotta know where your at and where it should be first. Best of all its free!
Also, I would like to approach the mechanic with a lil knowledge n info bout the issue. Flynbuick pour out as much knowledge u have on this...thanks ---------- Post added at 07:28 PM ---------- Previous post was at 07:25 PM ---------- Do anybody know where timing should b set at? Thanks..
The total timing without the vacuum advance should be 30 to 34 degrees without any audible pinging. It is possible the carb is running lean but check the timing first.
The stock Initial timing for a 1969 Buick Electra 225 with a 430 engine is 0* (TDC). Disconnect and plug the vacuum advance to check the initial timing at idle. That ONLY applies if the distributor in the engine is original. If the distributor has been replaced, the stock timing specs go out the window. The stock distributor part number is 1111335. A lot of parts get changed out in 43 years. Unless you have owned the car from new, and know it's history, you will need to check the distributor part number If the distributor is not original, the engine should be checked for total timing. All that is needed is a good timing light and a set of aftermarket advance springs. The details are in this thread that I wrote: http://www.v8buick.com/showthread.php?63475-Power-Timing-your-Buick-V8 Do you have a timing light, and do you feel capable of checking your timing?
No, I really dont feel comfortable with it...I took out my old distributor, n replaced it with one tht appears to b the same...now I have that pinging noise..I took it to a shop to have them replace it n get my timing straight...wht will I have to say to them to c if they're capable of doing the job ...I'm lost, n really ready to get it painted...I jus don't want to do it if I'm still under the hood...
wait for it .. I can here it coming . . . . . Why did you change out your distrib. and what did you put in ?
I changed it out, one of the wires connecting to the point assembly came loose, n the ride was horrible..I connected it back but the wires looked fried...its where the small bolt and wire connect...my clamp tht connects the wire to the bolt broke...so my electrical connection wasn't strong at tht point...so I thought to replace the whole distributor, as long as ity was stock r better yet, the one that matched up to the auto zone part finder.. took it to meineke to have then put it n, now u have tht pinging noise.....whts the percentage its n engine, r overall timing...thanks all info is appreciated...
Your car came from the factory with an advertised compression ratio of 10.25:1 Running on today's gas, the car has to be tuned exactly to spec for it not to ping under load - and even then it may once hot (the summer heat makes it even worse). So, you need to now find out where this new distributor is currently tuned at and what its total timing is when set to zero. I don't know your mechanic, but if he is not schooled in older cars you'd be much better off finding someone who is ... and prefferably a Buick knowledgable guy. Post your location - someone from the board may be nearby and willing to help. Without trying to sound snooty - you own a car that requires proper maintenance and upkeep. Its not a modern car that can run for 100,000 miles without ever opening the hood. Basic skills and tools - like checking and setting your timing - are required on a regular basis and unless your pockets are very deep, you should learn how to perform these skills and others. People here are very helpfull but you also need to learn to use the search function (top right of every page) and at least look to see if your questions have been answered before. In the case of your 430 timing, its been covered to death This thread covers just about everything you could ever want to know about timing http://www.v8buick.com/showthread.php?63475-Power-Timing-your-Buick-V8&highlight=
Distributors for the big block Buick are not all the same. They differ in the amount of mechanical advance built into them. I think it is safe to say that your timing is probably too advanced. It is very difficult to help you because it is pretty obvious that you aren't really versed in basic auto mechanics. I don't mean to insult you, but it is like we are speaking in different languages. Everything you need to know was in that linked thread I provided to you. If you would like to attempt to do this yourself, you will find plenty of support from everyone here. The first thing you need is a timing light. If you do not want to attempt this, then my best advice is to find a shop familiar with older cars. Tell the shop you replaced the distributor in the engine, and you need the total timing checked and adjusted to 32*. If they look at you like you have two heads, look for another shop. It might help you to list your location. If you lived near me, I'd help you myself. There may be a member close enough to help. You'll never know it, and neither will they. Either tell us where you live, or better yet, fill out your profile fully, so that your location comes up every time you post. Good luck.
you guys might be barking uo the wrong tree.... might be driveline, i had a loose torque converter bolt that acted kinda the same way. pinging might be different than knocking... just sayin"
Sure, lots of things can make noise in an engine, and transmission, but what is the most likely cause, and how should we go about diagnosing it? Checking ignition timing is a simple thing, and the first thing that needs to be done. A loose torque converter bolt will make noise all the time if you listen for it. Always check the simple things first. It's like the guy who skips all the way to a flattened cam lobe when his engine develops a slight miss.
Thanks to all...I'm new to this n I appreciate all the help...I'm in Indianapolis and I've been looking to get a hold of a gd Buick person...so all that has bn mentioned I'm going forward w/ tht...I appreciate all info n keep all coming....anything cn n will help...
For now turn the distrbutor back until it stops pinging/detonating. #1 cause of bearing failure is letting it knock....pounds out the bearings......like a sledgehammer hitting the piston. Even 93 premium isn't enought for high comp Buicks.
Did the factory rubber bushing fall off the pin that limits the mechanical advance? Either way you need to check both Int and total timing. Until you have done that you can't fix anything other then the wiring. Most parts installers today don't have a clue how to set up a points distributor or dwell.
I think he mentioned it was an Autozone replacement distributor, The Garage he used probably installed it, adjusted it to 10* initial, and never checked the total. I've seen that more times than I can remember right here on this board. ---------- Post added at 04:48 PM ---------- Previous post was at 04:46 PM ---------- Instead of paying someone else to work on your car, go to Sears, and buy their advance timing light. Then we will teach you how to use it.
