so i accidentally chipped the harmonic balancer while removing it and im wondering how big a deal it is. I know you dont want it to be out of balance but the chip is very small (only about half a pinky finger nail) maybe 3 or 4 grams in weight.

 

How in the world did you manage to do that?

Three or 4 grams? Dirt and oil could make it out of balance that much and its not like it is a 20" tire.

 

wrong puller, stupid mistake, so you think it will be ok then, dont bother buying a new one? heres a pic

 

You used a 3 prong puller instead of the one that bolts to the centre of the pulley......Seen that a few times

I wouldn't worry about it, as long as you can see there are no other cracks, like I said seen it a few, and it didn't effect the running on those XKs, I would just find it incredibly annoying knowing it was there

 

ya it is, but at this point im not wanting to spend any more money on it for a little while unless i can source a cheap used one. having spent money on the chains, guides, tensioners, thermostat, water pump, t stat housing this month. coulda bought a new car with what ive spent already

 

just a thought, but you could use a small grinding wheel, smooth out your "boo-boo" and then create an identical divit with the grinder directly oposite to the first one. That would rebalance everything again, right?

 

I think he should grind it smooth regardless of whether he puts an identical one on the opposite side. If you looked at that rough chip under a microscope you'd see hundreds of tiny little cracks. Those cracks will grow unless you smooth it out.

 

A welder could fix that like it never happened in about 5 minutes.

 

I think I would put it up on a lathe and machine it out/round again, you dont need the big lip there to hold the belt, would be a 5 minute job a machine shop would only charge a few bux for it, as long as something was left behind, I could live with that.

 

So, XKRacer, I am a bit confused and would like some clarification. That fix that you propose would change the weight of the balancer and reduce the lip to hold the belt in and would you propose that to be a better fix than having the balancer repaired to its original condition by repairing the chip area and restoring the balancer to its original condition?

 

I wouldn't say it is ideal, the amount you are taking off is not a lot as far as weight is concerned otherwise people who do the pulley conversions on Rs would of run into many problems by now.
I would not machine the lip completely off just enough to either lose the chip or leave enough to retain the belt.
It is also the cheapest route, as this seems to be part of the OPs criteria, if you weld the pulley, as it is cast, will harden as good as glass and be impossible to machine, it would then then need to be ground clean and could cause a lot more cracking, and lets face it, it would look no where near as good, OK not many will see it but being the person I am it would be my own personal option apart from replacing.

Just IMO

 

OK, I guess that's the difference. Having been a welding inspector in nuclear power plants for 10 years, I know that there are welders who could fix it as good as new, cast iron or not.

 

Gee Whiz . . . leave it alone.

 

lol, ok i took everybodys input and decided to grind it down and fill it. Ground down with a dremmel til it was smooth and shiny. then mixed up some jb weld and filled in the chip, let dry, ground down to proper shape, filled in a few spots, dried and reground, looks almost like nothing happened. I dont know what the weight difference is from jb weld to cast iron but on a piece that big cant be much. the car is back together and seems to run fine. will post pics when i can and keep u posted if anything goes terribly wrong

 

Sounds like a very good solution. While the weight difference between the ground out area and the original balancer might not have been a problem, surely the weight difference between the original metal and the jb weld is much less. Let's hope that it holds it's place and does not fly off. I have used jb weld sparingly over the years, but usually with good results.

 

I'm a bit late to chime in but...I think you went the correct route with JB Weld. Had you tried to weld cast iron, the heat required could very likely have ruined the rubber isolation band between the balancer and pulley. If constructed like most harmonic balancers, the outer pulley is pressed on to the hub and the rubber keeps it there.

 

hello i have a jaguar xjr 2000 and i was wondering were can i get a harmonic balancer my is crack ? any ideas?

 

A wreaking yard is the best source. Try here: Car-Part.com--Used Auto Parts Market

. . . and welcome to the forum!

 

go to motorcarsltd.com, they sell remanned harmonic balancers with new rubber

 

will Jaguar XK8 XKR 2001 harmonic balancer be compatible with the jaguar xjr 2000 harmonic balancer?