Re: engine vibration 232 engine

I think I told you awhile back(but maybe not, memory is shot)but i have a 
new aftermarket exhaust manifold to replace mine as it has a leak somewhere 
(cracked?). I'll let you know how that turns out. A couple of weeks from 
now.

Jay
----- Original Message ----- 
From: "Matt Haas" <mhaas@xxxxxxx>
To: <mail@xxxxxxxxxxxx>
Sent: Sunday, November 07, 2004 5:18 PM
Subject: Re: engine vibration 232 engine


> Jay,
>
> You can see the service bulletin here: 
> http://www.mattsoldcars.com/RestoreAmerican/loose_intake.shtml. It's not 
> an exact copy of it, but what I got my hands on wasn't either. I'd love to 
> have a copy of the original but what I put on my site should cover it. One 
> other thing that I just remembered -- the exhaust donut gasket in the 
> FelPro gasket set was the wrong size for my manifolds. I think it was too 
> small. The donut gasket I ended up with was also made by FelPro and sold 
> as fitting the same applications but worked okay. I don't know if that was 
> just a fluke or if it's still even a problem since the last gasket set I 
> bought was about 5 years ago.
>
> There's also another one for 1964-6 sixes about carbon build up in the 
> intake manifold from the heat riser valve not working properly causing 
> stumbling and hesitation. This fix for that is to remove the manifolds, 
> burn the carbon off with a torch, install a new heat riser valve, and put 
> everything back together. I doubt you'll be able to find a new heat riser 
> valve but if it isn't working, you can just cut it out and put in a couple 
> of pipe plugs. I've driven mine in about 10 degree weather since having 
> mine cut out and driveability was okay.
>
> Matt
>
> At 03:40 PM 11/7/2004 -0500, you wrote:
>>I already replaced the U-Joints when I  replaced the tranny mount. I 
>>already thought about the rear wheel brgs, but havenj't done anything with 
>>them yet. I have brand new tires (last week) and it had the vibration 
>>before I had the tires changed.  I guess the next thing to do is remove 
>>the manifolds, put on a new gasket and i have a new exhaust manifold to 
>>replace the old one(its getting noisy,thin walls, I think).
>>Have you a copy of the service bulletin you could email me a copy of?
>>
>>Jay
>>----- Original Message ----- From: "Matt Haas" <mhaas@xxxxxxx>
>>To: <mail@xxxxxxxxxxxx>
>>Sent: Sunday, November 07, 2004 2:41 PM
>>Subject: Re: engine vibration 232 engine
>>
>>
>>>Jay,
>>>
>>>I just found out that there was a service bulletin issued in 1969 about 
>>>rough idle and/or surging on six cylinders. The fix was new intake 
>>>manifold gaskets and a specific intake torque sequence. The bad part 
>>>about this fix is that you need to separate the intake and exhaust 
>>>manifolds and there's a good chance that one of those studs or bolts will 
>>>break.
>>>
>>>The torque sequence starts with the top left bolt behind the carburetor 
>>>and works clockwise outward. After that, it calls for tightening the nuts 
>>>on the intake to exhaust manifold studs (left first, then right) between 
>>>the carburetor and motor and then the outer manifold bolts (the ones that 
>>>are on the bottom) in the same order.
>>>
>>>The vibration could be a bunch of things. Once you fix the wheel 
>>>bearings, try over-inflating the tires (add bout 10 psi) and see if it 
>>>changes or goes away. You could also have any of the following out of 
>>>balance or damaged: wheels and tires, drums, driveshaft. Also, worn out 
>>>u-joints or rear wheel bearings can cause vibration.
>>>
>>>Matt
>>>
>>>At 11:35 AM 11/7/2004 -0500, you wrote:
>>>>I finally got around to tightening the intake and exhaust manifolds to 
>>>>25 ft/lbs and it did help the vibration problem but not entirely.  I 
>>>>also have a synchronous vibration while driving at about 35 mph. If I 
>>>>let up on the gas it diminishes slightly . There is a  "flex" fan on the 
>>>>engine, seems to be in good condition and the water pump has no play in 
>>>>the shaft. I would like to find a 5 blade OEM  fan as i don't like flex 
>>>>fans much. The problem with that is it is a small fan because of hose 
>>>>clearance problems. You have an American, so you know what I mean. The 
>>>>35 mph bibration may be a wheel bearing going bad. When I got the car 
>>>>back in April, I was checking things over and found the LF wheel was NOT 
>>>>tightened down properly at the wheel shaft nut. I tightened the nut 
>>>>about a 1/4 turn until I had no play in the wheel when held at the top 
>>>>and bottom.  I have no idea how many miles the bearing was loose and 
>>>>driven that way. I am going to replace the bearings on the front wheels 
>>>>just to be safe.    BTW, I had a simliar  35 mph vibration on my 66 AMBO 
>>>>and I never did find out what caused it. the only thing i didn' t 
>>>>replace on it was the engine mounts. I have replaced the tranny mount on 
>>>>the American.
>>>>
>>>>Jay
>>>>----- Original Message ----- From: "Matt Haas" <mhaas@xxxxxxx>
>>>>To: <mail@xxxxxxxxxxxx>
>>>>Sent: Monday, November 01, 2004 8:54 PM
>>>>Subject: Re: engine vibration 232 engine
>>>>
>>>>
>>>>>Jay,
>>>>>
>>>>>Check the intake manifold bolts. My American did that and tightening 
>>>>>the bolts solved the problem.
>>>>>
>>>>>Matt
>>>>>
>>>>>At 06:12 PM 10/31/2004 -0500, you wrote:
>>>>>>Hey Guys, i have a 66 American with the 232/2bbl engine. I have set 
>>>>>>the timing, set the idle speed at 700 rpm in neutral/ 550 in drive. 
>>>>>>The engine has new plugs and points, doesn't appear to have any vacuum 
>>>>>>leaks.  At the 550 rpm speed the engine has a rapid vibration which is 
>>>>>>quite annoying. The vibration mostly stops when i speed the engine up 
>>>>>>above the idle.  I have replaced the tranny mount which was dissolved 
>>>>>>from tranny fluid getting on it before i got the car. Could the engine 
>>>>>>mounts be so old and stiff that they won't absorb even the slightest 
>>>>>>vibration and transmit it to the frame? I had a 65 American with a 
>>>>>>232/2bbl when it was new in 65 and i don;t remember it being anything 
>>>>>>but smooth idling. The engine runs smoothly as far a vacuum gauge 
>>>>>>shows, no fluctuations due to worn valves or rings. The engine doesn't 
>>>>>>smoke and has 120k miles on the odometer. Someone did put the oil kit 
>>>>>>from the side of the block up into the valve cover as suggested in a 
>>>>>>service bulletin. I know that has nothing to do with the idle. Just 
>>>>>>mentioning it as I hadn't seen this done to many 232 engines.  I 
>>>>>>didn;t mention it but the engine has new plug wires also. Any ideas?
>>>>>>
>>>>>>Jay in Central FL.
>>>>>
>>>>>mhaas@xxxxxxx
>>>>>Cincinnati, OH
>>>>>http://www.mattsoldcars.com
>>>>>1966 Rambler Rebel
>>>>>1968 Rambler American sedan
>>>>>===============================================================
>>>>>According to a February survey of Internet holdouts released by
>>>>>UCLA's Center for Communication Policy, people cite
>>>>>not having a computer as the No. 1 reason they won't go online.
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