Flywheel removal
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Discussion

S6PNJ

Original Poster:

5,628 posts

297 months

Thursday 17th July
quotequote all
I'm in the middle of a clutch repalcment on my Sp6 and think I need to send my flywheel off for a refurb while everything is apart. Except for the obvious 6 (or is it 7?) bolts holding the flywheel on, is there anythign else I need to be aware of? Do I need to drain the engine oil or is everything still sealed behind the flywheel and removing it won't 'release' the oil as such?

Any tips / tricks to removing the flywheel and what torque should the bolts be re-done up to upon replacement?
Thanks!

GreenV8S

30,905 posts

300 months

Thursday 17th July
quotequote all
S6PNJ said:
what torque should the bolts be re-done up to upon replacement?
No disrespect intended, but the level of questions you're asking make me worry whether you know what you're doing. If this goes wrong then the worst case scenarios involve people literally losing limbs.

S6PNJ

Original Poster:

5,628 posts

297 months

Thursday 17th July
quotequote all
Thanks, yes, I know what I'm doing - just need the relevant info.

S6PNJ

Original Poster:

5,628 posts

297 months

Friday 18th July
quotequote all
Anyone know (and willing to share) the torque value for the flywheel bolts?

As to 'taking limbs off', if the flywheel is able to escape the 7 bolts, take the clutch pack with it, exit through the bell housing and take out the tubular steel chassis, then yes, limbs might be at risk, but I doubt it rolleyes

notaping

418 posts

87 months

Friday 18th July
quotequote all
When I built my 4.2 the figure I got from the build manual was 60lb/ft. Can't think it will be any different for the Sp6.

S6PNJ

Original Poster:

5,628 posts

297 months

Friday 18th July
quotequote all
Thanks, that's a helpful response. thumbup

Byker28i

76,123 posts

233 months

Friday 18th July
quotequote all
For the Cerbera there's a wiki for torque settings
https://www.pistonheads.com/gassing/topic.asp?h=0&...

PeteS2k

50 posts

153 months

Friday 18th July
quotequote all
The Sagaris manual is available in the member's area of the TVRCC web-site.

S6PNJ

Original Poster:

5,628 posts

297 months

Friday 18th July
quotequote all
Byker28i said:
For the Cerbera there's a wiki for torque settings
https://www.pistonheads.com/gassing/topic.asp?h=0&...
Thanks - useful, much obliged!

PeteS2k said:
The Sagaris manual is available in the member's area of the TVRCC web-site.
I was a member of the TVR Card Club but gave that up many years ago... I do have an original copy of the Sagaris manual (from Graham) but I didn't see it in there - indeed scant info on flywheel removal or clutch removal - eg remove the 4 bolts... that's it (sort of thing)!

weeman6556

67 posts

163 months

Friday 18th July
quotequote all
65ft lbs, its on page 437 of the Sagaris manual under Torque settings.

S6PNJ

Original Poster:

5,628 posts

297 months

Friday 18th July
quotequote all
Cheers! and dammit, I didn't think to look for a torque setting chapter (or just didn't spot it), just thought it would be under the clutch chapter. There is also the bell housing and gearbox torque values there so that saves me another question / search.

Basil Brush

5,358 posts

279 months

Friday 18th July
quotequote all
S6PNJ said:
Cheers! and dammit, I didn't think to look for a torque setting chapter (or just didn't spot it), just thought it would be under the clutch chapter. There is also the bell housing and gearbox torque values there so that saves me another question / search.
I was looking for it yesterday and thought the same!

S6PNJ

Original Poster:

5,628 posts

297 months

Friday 18th July
quotequote all
Thanks for the file, but I can't open it - could you try re-saving it in a different format or try resending it please? It's the 3mf one I can;t open - my (personal edition) of Fusion won't open it and my slicer (Cura) says it's empty or doesn't contain any models (despite being around 300Kb in size).

Basil Brush

5,358 posts

279 months

Friday 18th July
quotequote all
It's a Bambu file. I'll resend exported as an STL.

S6PNJ

Original Poster:

5,628 posts

297 months

Wednesday 30th July
quotequote all
Next part after flywheel removal comes ------ putting it all back together - and I think I've done something incorrectly.

Car won't start, get a couple of 'misfires' and the odd sneeze etc from the throttle bodies - something is definitely amiss!!

It didn't particularly dawn on me when refitting the flywheel, but I'm suspecting that I have (rotationally) incorrectly fitted it, hence probably a timing issue. The question is, how do I know which one of seemingly 8 positions (8 bolt holes all (from memory and photos) seemingly equally spaced) should the locating lug sit into? There is clearly a 'missing tooth' on the engine side of the flywheel which is for the hall effect sensor on the top of the engine where the flywheel sits.

Should the 'missing tooth' (timing mark) on the flywheel be nearest the locating lug by any chance? There's nothing I can see in Graham's bible and searching on here doesn't turn anything up. I've tried calling Jason / Chas at Str8Six (as they have previously serviced my car on several occasions) to ask for some technical help, but no one seems to answering the phone this afternoon.

I'm starting to think I'm going to have to strip everything down again, re-bleed, re-fill etc etc grrr....

One other linked question - there is a connection to the hall effect sensor - I know this has been refitted, but there is also a nearby plug that I don't particularly recollect removing - it says cam sensor on it - is this a redundant plug or have I inadvertently disconnected it and not remembered / realised? If so, where is the other end of it, ie where should it be plugged into?

CerbWill

697 posts

134 months

Wednesday 30th July
quotequote all
The flywheel will only fit on in 1 orientation unless you've somehow managed to jam it on at a wonky angle, highly unlikely! There's all sorts of extra plugs on the S6 wiring loom that aren't used.

The 2 holes top right have a different spacing to the rest & the hole at around 2 o'clock is a slightly different diameter.


Edited by CerbWill on Wednesday 30th July 18:35

S6PNJ

Original Poster:

5,628 posts

297 months

Wednesday 30th July
quotequote all
Cheers!

All 7 bolts went in, ie the holes must have been aligned, but that must have been pretty much good luck for me to align it without even thinking about it. Doesn't necessarily explain why it now won't start, when it was fine before the clutch/flywheel removal. What else can I check?

I've added a longer post here with more info in it if you fancy a read? https://www.pistonheads.com/gassing/topic.asp?h=0&...

CerbWill

697 posts

134 months

Wednesday 30th July
quotequote all
Worth getting to software out to see if its getting an RPM signal during cranking. Beyond that it's a lucky dip really. If it's cranking then you've obviously reconnected the starter motor wiring. I wonder if you've knocked a HT lead or the coil pack connector as its right next to the starter motor.

Other than that, if you've got it in a ramp/axle stands just double check it's not in gear with the handbrake on. Not that I've ever done anything that stupid. Obviously. biggrin

Edited by CerbWill on Wednesday 30th July 19:11

S6PNJ

Original Poster:

5,628 posts

297 months

Wednesday 30th July
quotequote all
CerbWill said:
Worth getting to software out to see if its getting an RPM signal during cranking. Beyond that it's a lucky dip really. If it's cranking then you've obviously reconnected the starter motor wiring. I wonder if you've knocked a HT lead or the coil pack connector as its right next to the starter motor.
Thanks! I have the software / cable etc so hook it up and look for... RPM signal how .... with the 'TVR software' or the alternative (can't remember the name of it - is it EvoOli's?) ?

The HT leads have not been disconnected, the 'LT' plug was removed and was 100% back on (as was the Hall effect sensor plug to the flywheel - both of which I've subsequently removed and reattached to try and eliminate.

notaping

418 posts

87 months

Wednesday 30th July
quotequote all
If you run the software and record a trace while trying to start the engine you should be able to see any logged faults in the csv file created. Look for a '1' in any faults column.

Text from the original TVR software help fiile: -