Motor back together, first start, goofy idle timing advance

[one finger john]

So Lee, what was the timing problem?

John

 

[Gerry]

[QUOTE="

[/QUOTE]

Built in intercooler as well. Deal.

Would also like to know what the problem was?

 

[Lee_in_KC]

So Lee, what was the timing problem?

John

Well, I'm not sure. There wasn't anything obvious. I just kept tuning on it. Maybe breaking it in a little more by driving around helped. Got some more heat into the motor or something?!?!? Heck, I don't know. I'm tired of screwing with it!!

 

[2old2fast]

Hey Lee , how's the motor doing , have you put some miles on ??
dave

 

[Lee_in_KC]

Only have about 100 miles on it, but so far so good, with one exception. Water pump is bad... squealing pretty good and coolant leaking out the weep hole. I have had a pump fail before. I think it's because of the strain of the v-belt. I have to run it very tight to keep the alternator pulley from squealing on start-up. I don't know if it's due to the low mount alternator or what, but it has always been a problem. Seriously thinking about going to a gilmer belt drive.

 

[railroad]

You might want to do a check on the pulley and belt size. Not all V belts are the same angle or width. I would not think you have enough battery drain to really load down the alternator. I like the Edelbrock water pumps. They are available in bright finish, bling, too.

 

[T-Test]

Only have about 100 miles on it, but so far so good, with one exception. Water pump is bad... squealing pretty good and coolant leaking out the weep hole. I have had a pump fail before. I think it's because of the strain of the v-belt. I have to run it very tight to keep the alternator pulley from squealing on start-up. I don't know if it's due to the low mount alternator or what, but it has always been a problem. Seriously thinking about going to a gilmer belt drive.

Lee, if you are using an aluminum alternator pulley, I'd say that is the problem. Put a steel pully on and I bet it does the trick. Ask Cookieman?

 

[Lee_in_KC]

Railroad, the belt seems to fit the pulleys well. I don't know how to determine the best fit. Bruce, the alternator pulley is chromed steel.

The belt only slips on the alternator until I rev the motor to bring the alternator on-line. The alternator is a Powermaster that is maybe five years old.

 

[choppedtop]

They used to make a belt dressing that would prevent belt slipping. May be worth a try, just to see if that cures the problem. Temporary bandaid, but that may let you know if the aluminum is the problem.

 

[Lee_in_KC]

They used to make a belt dressing that would prevent belt slipping. May be worth a try, just to see if that cures the problem. Temporary bandaid, but that may let you know if the aluminum is the problem.

I tried that... it helped a little temporarily.

 

[2old2fast]

When my "big name" water pump puked 3 or 4 years ago , I put a jegs "house brand" [read cheap] aluminum pump on , it's been fine so far ...
dave​

 

[fletcherson]

I have the same issue on my z28. When I first accelerate enough to activate the voltage regulator, it squeals a bit and it has a serpentine belt on it. It's a high output alternator. It bugs me, but that's the only time it does it, so I just live with it. I thought about changing the pulley diameter to attempt to spin the alternator at a higher speed at idle so it would be energized sooner, but that's as far as I got with it.

 

[2old2fast]

My alternator is a small GM [90's] 105 amp converted to 1-wire , never a problem .
dave

 

[railroad]

Pulley diameter is also a factor in belt traction and alternator function. A larger pulley might be a cure for the squeal, but have to watch and maintain sufficient alternator rpm.