Ron67Alpine
Silver Level Sponsor
Not long ago I posted a couple of questions about water from my exhaust and a squeal coming from engine.
I've come across a factory service bulletin posted on TE/AE forum site that may be pertainant.
Bulletin 68-18: Alpine V Engine Vibration:
http://teae.org/1968/bulletin-68-18/
This is about a "vibration" particularly around 3200rpm which can be "felt" through the gas pedal. It is apparantly associated w/the center exhaust manifold bolt.
Has anyone ever had this problem and is there any kind of noise or squeal associated w/this vibration? This question is only about wether the above "vibration" talked about in this service bulletin can generate the squealing, I've been hearing. Suggestions from the previous threads have included belts/alt/water pump, #3 rod bearing, something dragging on the flywheel, starter not disengaging, distributor bushings, rear main bearing, center main journal thrust bearing. The simple stuff I've taken care of, I'd really like to totally eliminate all the easy stuff, before I take the engine apart or buy new distributor.
thanks,
Ron
Below are some quotes, from the "water from exhaust" thread discribing what I'm hearing and where it's apparantly coming from.
"When I go quickly to a high rpm, I hear a screeching. I'd, previously, thought it was the pump or belt, but I've fixed those things. "
"The screeching is a worry, I was also thinking of a spun bearing. I've got around 22lbs oil pressure @ around 2K rpm, 40 @ 3K. I've got a new aftermarket OP guage."
"I kinda included eliminating anything associated w/the belt/alt/waterpump, when I mentioned replacing WP/belt. It was also the first thing I thought of when I got it started the first time and heard the noise. The alt is also a new replacement. Everything up there is now quiet as a church mouse."
"I've been hearing this racing idle screech, since I first got the engine running, last spring. As mentioned, I've pretty much gone down the list of standard suspects. Alt/pump/belts are all new and not making any noise. There was quite a bit of time while waiting for parts to arrive, where I did start the engine w/everything disconnedted from the belt and still got the screeching, when engine races."
"I'm pretty sure the starter is disengaging. I've had no problems w/jamming. It's not a clattering of gears grinding, either.
Since, getting it to idle, relatively well, I've been able to listen better, as to where it's coming from. It's not as loud as it used to be and seems to be coming from mid engine, under the manifolds. It only happens when, it (quickly) revs from low to high rpms. It could even be metal on metal vibration."
"I replaced it w/a new steel pump from Classic Sunbeam as well as a new alternator. I also heard the noise at least once, when I had the alt and WP removed while waiting for replacements. I know this sounds like one of the above but I'm really sure it's not."
"I was just in the garage, idling the car. I had her up to over 5Krpm before the screaching started."
Since my last post in the "water" thread, I've done a couple of more tests w/engine speed. If I slowly bring the revs up, it doesn't squeel, until reaching around 5K, but if I quickly bring the revs up, it starts at a much lower rpm. Pushing the clutch in while squeeling does nothing.
I've come across a factory service bulletin posted on TE/AE forum site that may be pertainant.
Bulletin 68-18: Alpine V Engine Vibration:
http://teae.org/1968/bulletin-68-18/
This is about a "vibration" particularly around 3200rpm which can be "felt" through the gas pedal. It is apparantly associated w/the center exhaust manifold bolt.
Has anyone ever had this problem and is there any kind of noise or squeal associated w/this vibration? This question is only about wether the above "vibration" talked about in this service bulletin can generate the squealing, I've been hearing. Suggestions from the previous threads have included belts/alt/water pump, #3 rod bearing, something dragging on the flywheel, starter not disengaging, distributor bushings, rear main bearing, center main journal thrust bearing. The simple stuff I've taken care of, I'd really like to totally eliminate all the easy stuff, before I take the engine apart or buy new distributor.
thanks,
Ron
Below are some quotes, from the "water from exhaust" thread discribing what I'm hearing and where it's apparantly coming from.
"When I go quickly to a high rpm, I hear a screeching. I'd, previously, thought it was the pump or belt, but I've fixed those things. "
"The screeching is a worry, I was also thinking of a spun bearing. I've got around 22lbs oil pressure @ around 2K rpm, 40 @ 3K. I've got a new aftermarket OP guage."
"I kinda included eliminating anything associated w/the belt/alt/waterpump, when I mentioned replacing WP/belt. It was also the first thing I thought of when I got it started the first time and heard the noise. The alt is also a new replacement. Everything up there is now quiet as a church mouse."
"I've been hearing this racing idle screech, since I first got the engine running, last spring. As mentioned, I've pretty much gone down the list of standard suspects. Alt/pump/belts are all new and not making any noise. There was quite a bit of time while waiting for parts to arrive, where I did start the engine w/everything disconnedted from the belt and still got the screeching, when engine races."
"I'm pretty sure the starter is disengaging. I've had no problems w/jamming. It's not a clattering of gears grinding, either.
Since, getting it to idle, relatively well, I've been able to listen better, as to where it's coming from. It's not as loud as it used to be and seems to be coming from mid engine, under the manifolds. It only happens when, it (quickly) revs from low to high rpms. It could even be metal on metal vibration."
"I replaced it w/a new steel pump from Classic Sunbeam as well as a new alternator. I also heard the noise at least once, when I had the alt and WP removed while waiting for replacements. I know this sounds like one of the above but I'm really sure it's not."
"I was just in the garage, idling the car. I had her up to over 5Krpm before the screaching started."
Since my last post in the "water" thread, I've done a couple of more tests w/engine speed. If I slowly bring the revs up, it doesn't squeel, until reaching around 5K, but if I quickly bring the revs up, it starts at a much lower rpm. Pushing the clutch in while squeeling does nothing.