Lotus Elan

reinstalling timing chain

PostPost by: billwill » Tue Oct 05, 2021 1:47 pm

You probably didn't actually need to take the tensioner out. If you had put a bit of string or wire on the top of the chain and tied it up so that the top of the chain doesnt fall down to the waterpump-boss. You could take the chain off the camshaft sprockets (or take the sprockets off). and have a very slack chain.

With the tensioner slacked off, you could probably have tapped the jammed chain free of the mainshaft & casing jam by using a long metal rod. You can then juggle the slack chain until you can see/feel that it is correctly on the mainshaft sprocket and then using the pull-up string/wire keep it taught until you have got it on the exhaust cam sprocket and then the inlet cam sprocket and tensioner. The important bit is to get the exhaust side of the chain reasonably taut & straight, while ensuring that the timing marks line up. The rest just more or less follows naturally.

That's pretty much how I do it, though I have never yet jammed the chain at the bottom :D
Bill Williams

36/6725 S3 Coupe OGU108E Yellow over Black.
billwill
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 4892
Joined: 19 Apr 2008
Location: London UK

PostPost by: rgh0 » Wed Oct 06, 2021 8:30 am

I just leave the sump off until I get the head fitted and timing done, makes ensuring the chain its fitted correctly easy and also enables easy retrieval of anything you drop down the chain cover :)

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 8031
Joined: 22 Sep 2003
Location: Melbourne, Australia

PostPost by: billwill » Wed Oct 06, 2021 5:46 pm

rgh0 wrote:I just leave the sump off until I get the head fitted and timing done, makes ensuring the chain its fitted correctly easy and also enables easy retrieval of anything you drop down the chain cover :)

cheers
Rohan



But that's only applicable if the engine is out of the car.
Bill Williams

36/6725 S3 Coupe OGU108E Yellow over Black.
billwill
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 4892
Joined: 19 Apr 2008
Location: London UK

PostPost by: nmauduit » Thu Oct 07, 2021 1:00 pm

billwill wrote:But that's only applicable if the engine is out of the car.

a common mod consist in making the U profile brace under the chassis removable, so that the sump can be removed with the engine in place...
S4SE 36/8198
User avatar
nmauduit
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1820
Joined: 02 Sep 2013
Location: France

PostPost by: Mazzini » Thu Oct 07, 2021 3:26 pm

nmauduit wrote:
billwill wrote:But that's only applicable if the engine is out of the car.

a common mod consist in making the U profile brace under the chassis removable, so that the sump can be removed with the engine in place...


+1. Can't understand why Lotus didn't do it back in the day.
User avatar
Mazzini
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2260
Joined: 11 Dec 2010
Location: NE UK
Previous

Total Online:

Users browsing this forum: No registered users and 9 guests