Re: Asbestos heat shield & vibration

["jtrealtywebspannet" <jtrealty@xxxx>]

I replaced my heat shield with a non-asbestoes replacement from P.J. 
Grady. It is easy to do just try not to make too much dust and put the 
old one into a plastic bag, label as containing asbestoes, and dispose 
of properly. The only complaint with the replacement was that it 
emmitted an odor for a while until it all burnt out. It looks exactly 
like the origional. (I don't think it can have a large affect on 
overheating the motor.)
The temp problem sounds normal, what you are seeing is "heat soak".
The vibration problem sounds like the service center you went to 
didn't know what they are doing. It should be easy to eliminate a 
vibration problem if they know how to use a dynamic wheel balancer. 
Let us know how you did your wheel bearing repack, I for one would 
really be interested in the procedure!
Sources of vibration include any rotating part that is not balanced 
or is bent, or is missing pieces. Don't confuse alignment with 
balancing, a car out of alignment won't usually have a vibration and a 
car with a vibration doesn't usually need an alignment. A quick and 
dirty way to see if you have a bent rim is to raise the wheel and 
position a pointer against the outer edge of the rim. Rotate the tire 
slowly and the distance from the pointer to the rim should stay the 
same. Inspect the tires, run your hand over the sides and the tread 
looking for any lumps and bumps, of course have the correct air 
pressures in the tires. Generally when you have an out of balance tire 
the vibration is noticeable only at a particular speed, a vibration 
that gets worse as speed increases usually means something is bent. 
Worn tie rod ends will make things seem worse so check them too.
David Teitelbaum
vin 10757



--- In dmcnews@xxxx, "aaron_t_graham" <aaron_t_graham@xxxx> wrote:
> 
> My Delorean is running noticeably hotter than usual. The coolant 
> system works great; I spent several hundred $ making sure of that. 

> One thing that I did notice is that the engine will often be much 
> hotter *after* I leave it off for a few minutes (e.g., to get gas). 

> Then, when I crank the engine, the indicator rises almost to the 220 
> mark, the cooling fans come on, and it promptly cools down.
> 
> One cause for this may be the asbestos heat shield. Mine is 
starting 
> to break up, and I would like to get it replaced. I noticed that