Lotus Elan Central

by **Paul.P** » Thu 15.11.2007, 20:41

Can anyone please tell me torque settings of the 4 bolts & 2 nuts that hold the wastegate manifold to the pre-cat ?

by **paulwatkins** » Thu 15.11.2007, 20:53

Paul, is this diagram any good, or is it the wrong section?

by **Paul.P** » Thu 15.11.2007, 20:55

Yea, thats spot on Paul !, do you know these settings ?

by **paulwatkins** » Thu 15.11.2007, 20:56

No I just copied the diagram from the manual.

I referenced it when I did my rebuild

by **tweetdriver63** » Thu 15.11.2007, 21:03

Paul.P wrote:Yea, thats spot on Paul !, do you know these settings ?

If this is what you're asking, that's lb-ft in parenthesis, and the metric (whatever you guys use) is the other number.

by **Paul.P** » Thu 15.11.2007, 21:05

tweetdriver63 wrote:If this is what you're asking, that's lb-ft in parenthesis, and the metric (whatever you guys use) is the other number.

Need the values Chris ?

by **GeoffSmith** » Thu 15.11.2007, 21:29

Paul.P wrote:
tweetdriver63 wrote:If this is what you're asking, that's lb-ft in parenthesis, and the metric (whatever you guys use) is the other number.

Need the values Chris ?

20.9 lb-ft and 43.3 lb-ft according to the diagram Paul. :wink:

by **Paul.P** » Thu 15.11.2007, 21:53

geoffsmith wrote:20.9 lb-ft and 43.3 lb-ft according to the diagram Paul.

WAP !, thanks Geoffers, good job your here :!:

by **Paul.P** » Thu 15.11.2007, 22:29

From what i can make out from diagram Geoff, the 6 bolts are all 20.9, do you concour ?
Think the 43's are the bolts which hold the turbo to the engine ?

by **GeoffSmith** » Thu 15.11.2007, 23:59

Yep.

Exhaust manifold to block and turbo housing to manifold = 43

Wastegate plumbing (bit agricultural to be called a manifold Paul!) to turbo and plumbing to precat pre-cat = 20.9

It's now Wiki'd for when I come to do it.

Just noticed that the 'metric' figures are a bit strange, because by my reckoning, 43ft-lbs = 29 N.m not 2.9! :smt017

by **tweetdriver63** » Fri 16.11.2007, 01:33

Geoff,
This is how the service manual explains the numbers:

kgf.m (lbf.ft)

I'm not sure what the extra "f" is in each (before the dot), but my guess is "force," so pound force per foot, and kilogram force per meter. Sound reasonable?

If so, then 43.3 lb-ft = 19.6kg-ft = 5.9kg-m.

That would seem to agree with the diagram, which has "6.0 (43.3)" for the turbo mounting bolts.

Wow. I'm pretty good. :smt038

(We need a smiley that pats itself on the back)

by **GeoffSmith** » Fri 16.11.2007, 09:11

.... and multiply by 9.8m/s² to convert to Newtons. :smt023

by **dapinky** » Fri 16.11.2007, 11:35

I agree with both the findings and the mathmatics, however, i take exception to the phrase which suggests we on this side of the pond use Metric!!!!

Luckily the British (I can't say English, 'cos the Scotts Dragoons were there aswell) beat Napoleon a few years ago and as such, and being an 'old fart', i still work in Imperial measurements.

I'm quite used to useing a spanner (wrench) and do a bolt up to 25ft.lbs and be happy that it is gonna be very close to the required torque, but i wouldn't have a clue what 15Nm or 1.6Kg.M feels like.

Sorry, I'm :offtopic:

by **rip** » Fri 16.11.2007, 13:24

dapinky wrote:I agree with both the findings and the mathmatics, however, i take exception to the phrase which suggests we on this side of the pond use Metric!!!!

We all use both in the UK.

I expect you will have a metric set of spanners. You should have because most (if not all) of the nuts & bolts in the Elan are metric.

I was brought up fairly fluent in both, and believe imperial to be silly (which I am prepared to debate sensibly in the off-topic section), but I fully understand that to ditch it in favour of metric would be a major, expensive upheaval.

A kg.m is not a true measurement of torque anyway.

:offtopic:

by **dapinky** » Fri 16.11.2007, 13:36

rip wrote:I expect you will have a metric set of spanners. You should have because most (if not all) of the nuts & bolts in the Elan are metric.

.....and believe imperial to be silly (which I am prepared to debate sensibly in the off-topic section)

Sorry, I am definately Off Topic!

Yes, I have metric spanners etc (and I do understand linear metric) but cannot accept what is silly about measuring distance in cubits, chains and furlongs :roll:

)

We all accept horses measured in hands, races in furlongs, distances in miles, pressure in psi, fuel in gallons, milk in pints, beer in the official 'scoop' {which = 1 Imperial pint!}, etc etc etc

I was dismayed when i last bought some timber though.....

....I wanted 2 yards of 4" x 2"........

.....I could only get 2 metres of 100mm x 47mm.......

....and it cost me 3 bob a foot! :smt044