Spark Plug Module Mounting Bolt

I have a 2000 Chrysler LHS with approximately 50,000 miles.
When I went to clean the plugs, I tried the only Torx size bits that
were close (T25 and T30).
It appears that I need a size between those two. Has anyone changed the
plugs on the 3.5 V6 and what size torx bit do I need.
Also, any recommendations on what plugs to use and what plugs to stay
away from? The Chilton manual recommends Champion RC12PEC5, or equivalent.

Thanks in advance,
Ron
Munroe Falls, Ohio

 

There is no T27.5. T25 is the right size. It can be a problem getting
them out. You might try letting some good penetrating oil soak in and a
good rap square on the head of the screws with a hammer before taking
them out. Anti-seize on re-install.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
adddress with the letter 'x')

 

it's a #27 torqs and the plugs are a 100k maintence item. u have 50 k to go

 

I didn't know about the existence of T27 torx. That would explain why
people post a lot on the LH forums of problems getting those screws out
(T27 is an odd size in your generic - i.e., cheap - torx sets). I've
read that on the later years of LH production, they don't use torx
screws. Not sure what they went to - maybe hex cap - but they must've
gotten a lot of complaints about the torx's.

(Hmmm - Before I hit "send", I went and checked the set I have. It is a
cheap set, but it does in fact have T25, T27, and T30. Probably
unusual, but would explain why I didn't have the problems a lot of
others have had with those screws.)

I have found that it's best not to go the full 100k on plugs. More
chance of a plug binding in the threads, gas mileage definitely drops
considerably during the later parts of the 100k even though it may run
fine (probably some drop in performance if it were to be meaured), and
probably idle quality suffers.

I definitely think it's a worthwhile gain to change no later than 80k
(I've been doing mine about every 70k - even then, there is a genuine
jump in mileage when I change them).

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
adddress with the letter 'x')

 

Seems we both need to backpedal a little on this one. I just went out
and checked the fit of the torx bits in the coil mounting screws on my
'99 Concorde. The T27 was definitely too big. The T25 is the right
size. Either your saying it's a T27 is wrong, or they changed the size
from one year to the next on the LH cars.

It's definitely T25 on mine.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
adddress with the letter 'x')

 

Bill and Tim
Thanks for the input.
I was concerned about the 100,000 mile plug replacement. It seems like
after 8-10 years of my typical driving, the plugs would be impossible to
get out. My first thought was to pull the plugs and see what they
looked like.
I will try to find a T27 because the T25 definitely spins on my LHS.

Ron
Munroe Falls

 

Normally what happens is over the years that #27 hole gets corroded and the
shape changes. That causes the bit to strip the screw.

 

Whatever size it is, normally over the years the screw becomes corroded and
the bit no longer fits

 

if that doesn't work get a new good set of vice grips

 

Or get your allen wrenches out, I forget which one will work but you will
be surprised how it fits when your torx bit doesnt work

 

that is true. i use my torqs bits in allen bolts such as the tcase