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Studiog
yes, i agree 100%. I'm going for the 2nd opinion route now.
enough throwing good money after bad
yes, i agree 100%. I'm going for the 2nd opinion route now.
enough throwing good money after bad
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Viet Nam Vett said:Sounds like it's time to move on to a new Mechanic...No disrespect intended.
Were talking about 60's tech..Points & basic timing set up. Any good mechanic should be able to figure out this problem with this simple 60's tech ignition if he is familiar with a points type system.
The motor must be diagnosed in the proper order to eliminate other items that could be causing the problem. There is a valve trane to consider also as well as other items. I think your on the right track with county corvette..
Good luck and keep us posted on your progress. I'm sure we would all like to know what the final problem was for our own future troubles.![]()
sting66ray said:This is going to sound strange, but have you checked the valve lash, that might make it feel like it was missing somewhat, I believe you should have solid lifters and they need to be checked almost monthly.
Tom
BarryK said:Hi
I have the 327/365 in my car.
i'm not very knowlegable on distributors and engine repairs so please excuse me if this post seems a bit disjointed or confusing but it's the best I can explain it.
When I bought the car a few months ago I was told the distributor needed to be recurved. I took it to my mechanic - he is the only one who touches my car so far and came highly recommended from a friend who also has a '65.
After replacing the points and trying to recurve and redo the timing my mechanic said he couldn't get the timing set properly because the bushings were worn. As I understand it that means as the timing was changing constantly because of the movement of the shaft because of the worn bushings?
Anyway, since I had the cataloges from the Vette suppliers we went through the Long Island Corvette cat and bought the following:
new shaft (the hi-perf one for the 365hp motor)
springs and weights
baseplate and wire
vacume advance
tach driven gear
lower gear and lower gear pin
upper shaft bushing and lower shaft bushing
Two days ago he rebuilt the distributor with the new parts. Again he said he can't get the timing set correctly. On the first try after setting the dwell (with some meter) and than setting the timing with the timing light we drove the car and it wouldn't get out of it's own way and it sounded really bad. He immediatelly said it seemed as though something on the front of the engine "slipped" (maybe a harmonic balancer - I'm not really sure or can't remember what he said exactly) but that he could probably get the timing set by ear and by driving the car.
After almost another 2 hours of playing with it it's SLIGHTLY better than before we started with all the new parts but barely. Previously, the car would rev to 6000rpm than the engine just wouldn't go any further. Now it will go to about 6300rpm but still no further. Also, low end torgue is not what I think it really should be.
I really don't rev the engine up very hight when i'm driving it but I DO want everything to be right and everything set correctly regardless.
Now he tells me we need to get a new "vibration dampener" and that will allow him to properly get the timing set correctly.
Does this sound correct???
The first time I took the car to him was for the distributor recurve (and a few other things). That was $300 and I still left without proper timing. Than I got the parts which cost me over $200 from LICS and than the labor charge again the other day of $270. I've already spent almost $800 and it's still not right and calling around locally this "vibration dampener" runs about $70 and it will be about 1.5 hours labor to install for another approx $112.50.
Am I wasting my time (and more importantly my money!)? What's going on here?
Please Help!
Barry
Tempus_Fugit said:Here is how I set up distributors. I have done this many many times.
you need to get #1 cylinder at tdc on the compression stroke. This has nothing to do with the distributor. Have some one tick it over while you have your finger over the plug hole. When it starts to compress you need to bring it up to the top, this can be difficult but if you do not trust the damper you need to slip something long and thin into the hole and feel when the piston hits the top. You will need to rotate engine manually without the starter, it might be easier with the plugs out. On a car with a good (non slipped) damper the marks will line up at 0.
Paint a nice white stripe on the damper mark, which is hopefully very near the adjustment teeth. If the mark is no where in sight, paint your own mark at 0 until you can get a new damper, it will not be 100% accurate, but it will be close.
Now you need to set up the dist so the rotor is slightly past the #1 terminal. This is because of the the cylinder actually fires prior to the piston hitting tdc. Note here that you can't really be (funtionally) a tooth off. You could put position the distributor housing any place you want and you could still line up #1. However on your 365 (like mine) you have to hit the right tooth on order to get the vaccum pod between the coil and the intake and still have a good range of adjustment.
As an ex wrench I would say that half the calls I get from friends for help is in setting up distributors. On monster garage one time I watched a "pro" struggle with this a long time. This is becoming lost art like carbs and points.
Don't be quick to dismiss dealers. There atill some old timers at dealers who know c2-c3s inside and out. Walk in the back door and look for old guys, ask them the right questions. If you are satisfied with their experiences, have them write a work order. It will probably cost 50-100 bucks.
AVR75 said:HOW WAS THE VEHICLE RUNNING BEFORE YOU FIRST WENT TO HIM? IF IT WAS RUNNING O.K. THEN HE WORKED ON IT AND MADE CONDITION WORSE,I WOULD THINK HE MAY HAVE CONTRIBUTED TO THE CONDITION IT IS IN. EITHER WAY HE SHOULD BE ABLE TO DIAGNOSE THE PROBLEM MORE THOUROUGHLY:eyerole MAYBE THE LOCAL CHEVY DEALER MIGHT NOT HAVE BEEN SUCH A BAD IDEA???????
jerrybramlett said:Valve lash has nothing to do with spark timing. It has everything to do with low speed power. Rockers set too tight will kill the off-idle response of the stock 365 hp cam. So will any non-stock magic/mystical settings that may be recommended by valve train fanatics. Use the .030/.030" setting recommended by GM. Yes, you can set them cold with the engine off. No, you don't need to check them every month. Every 5,000 miles when you change plugs is plenty.
You can do a quick check to find out if your valve lash has been set too tight. Just see what intake vacuum you have at an 800 rpm idle speed. If it's less than 12 inches of vacuum, your lash is probably too tight.
IH2LOSE said:Barry again sorry for your troubles.
Have you met any local vette owners or collector car owners who do there own wrenching?
Maybee you can get with them to help you sort things out.Around me I have some collector car owners and they help me with my problems and I help them with theres.Its terrible to say but there are not too many real mecanics working in shops these days they all seem to be parts changers with no real diagnostic skills if the computer is not showing a code they cant fix it.You need to get with some old school people to help you through this.I am luckey because when I get in a real jam I have my brother inlaws who were trained by me deceased father in law who are REAL mecanics.
Good luck and you really need to get to square one,I would suggest having the distriputor proffestionally rebuilt and tested (dave feilder TI specialties and others) then working away from that.Wants been sucessfull for me is working with folks who have collector cars them selfs.
Good Luck and I do understand your frustration I have been thu it my self with my computors at work not being able to correct the problem my self and trusting a SO CALLED mecanic to fix it only to find out they just own the tools they are actually not a mecanic.
coves4me said:Barry,
I have used the following methods to time many engines and it has worked for me very successfully. Assuming the engine is still assembled with the distributor installed, pull all of the spark plugs except the No. 1 cylinder. On a Chevy, it is the forwardmost cylinder on the driver's side of the engine. With the transmission in neutral, and using a breaker bar or long socket extension handle and properly-sized socket, rotate the crankshaft by hand using the crankshaft bolt inside the crankshaft pulley. Rotate the engine in the direction of normal travel and feel for resistance on the bar. When resistance is felt, you are on the compression stroke of the No. 1 cylinder. Since balancers can't slip, the timing marks on the pointer and on the scored line on the balancer should locate top dead center (TDC) for you even if there is some wear in the timing chain. Once found, and with the distributor cap still installed, find the No. 1 plug wire and put a small mark on the side of the distributor housing directly below the No. 1 plug wire location on the cap. Now pull the cap, and view the relationship between the rotor firing tip and the mark you just made. If they line up, your timing is close to being on target. If they don't, you need to pull the distributor and rotate it until it drops in so that the rotor and the marks line up. You may need to rotate the oil pump driveshaft below the distributor that interlocks with the bottom of the distributor shaft to get the distributor to drop in. Once in, install the hold down bolt, install the cap, install the other plugs and check to make sure the plug wires are correcly installed per the firing order, and then see if it fires. It should, and you should then be able to set your timing correctly. Also, remember that point gap affects timing, so make sure that your points are set to 28-32 degrees dwell with the engine running. Once set, recheck your timing at the crank. I hope this helps.![]()
Rowdy1 said:In your very first post here, you said you were told your distributor needed to be recurved, by who, the seller? And "if" so, what led him or her to make that statement? You say the engine was rebuilt just before you bought the car right? There's a whole lot to be said for the newer technology in distributors as opposed to point ignitions, especially dual points. I'm puzzled by a few things you say also regarding the low end and the high end. A small block isn't known for it's low end torque but it is for it's ablity to rev, BUT, unless you have an aftermarket cam, 6500 is your redline for that or any other small block. I had a dual point in my 62 and changed it over to unilite after about a month for $105.00 and shortly after that, I went with a total MSD ignition and I don't regret it a bit. Keep us up on what you find and if you want a pointless Mallory distributor with the tach drive give me a shout.
vettefinderjim said:First off Barry, You have so many posts here this must be very confusing by now. Jerry Bramlett has given great advice, as others, but that advice is for you as a new mechanic to take on.
This is not a hard item to learn, but there are three items in timing that must be understood.
Basic timing, vacumn advance, mechanical advance and then the total advance or all items added together. In the old race days, we set 40 degrees total advance at 3000RPM......and these little 283 and 327 motors ran fast. real fast. All three of these items must be checked for your car to run properly
You may have a vacumn canister that is not correct for this engine........it may be that simple.
You may have a camshaft that was not installed correctly, but as Jerry says, this can be compensated for.
You may have a bad camshaft,with worn lobes. Still working, but opening the valve late.....and closing it early. That means the gas/air mixtures entering the cylinders is lean of fuel......and no POWER or TORQUE comes out of the motor.
Believe it or not, your CHEVROLET dealer has good techs that can do a complete ignition and timing check on your car. And I will guarantee you that the restorer with 43 cars can also. If i were you, I would start from the beginning. ONE HOUR should completely check and repair minor timing problems. The almost $1000 you have invested could have replaced a camshaft !
Sorry for the grief......once corrected and you drive a good 365hp car, you will lust for many miles of continued smiles. Those motors.....set correctly were very powerfully.
Jim