Lotus Elan

Oil pickup pipe press fit

PostPost by: 2cams70 » Mon Jul 04, 2016 3:14 pm

Hi Guys,

I'm wondering whether anyone has had issues with the press fit used on later pickup pipes becoming loose. In my younger days scouring wreckers yards when English Fords were everywhere I well remember taking the sump off a newly reconditioned crossflow engine I was going to purchase only to find the crankshaft and it's bearings totally destroyed. On closer examination I found the oil pickup pipe to be loose at the press fit interface between the pipe and the block. It was obvious that the oil pump had been sucking in air at this point rather than oil from the sump!

I don't want the same thing to happen to my Lotus engine and as it is currently the press fit seems to be a bit loose. Do you guys have any recommendations regarding how to restore/improve the press fit or a suitable sealant to use at this joint? The pickup is the big wing type so unfortunately I cannot easily find a replacement because the Elan/Cortina type is different.

Photos of the pickup and of the press fit section are attached for reference.

Regards
Attachments
img_15101.jpg and
img_15081.jpg and
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2015 Honda City 5spd.
2cams70
Fourth Gear
Fourth Gear
 
Posts: 938
Joined: 10 Jun 2015
Location: Australia

PostPost by: Galwaylotus » Mon Jul 04, 2016 7:12 pm

Consider getting it swaged to a tighter-fitting diameter.
Mechanical Engineer, happily retired!

'67 S3 SE FHC

See Facebook page: W J Barry Photography

Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Galwaylotus
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1357
Joined: 01 May 2006
Location: Galway, Ireland

PostPost by: Hawksfield » Mon Jul 04, 2016 7:16 pm

Hi

I always use Loctite bearing fit, never had a problem but also its not loose in the block.
Also mine is a straight tube.
Regards

John

+2s130 1971
User avatar
Hawksfield
Third Gear
Third Gear
 
Posts: 387
Joined: 14 Jul 2004
Location: Hartlepool Teesside

PostPost by: mrdoow » Mon Jul 04, 2016 7:20 pm

20140415_101704.jpg and
die and practice result
Can you resize the end with a die made from a hard bolt (see photos)?
Attachments
20140415_095753.jpg and
mrdoow
First Gear
First Gear
 
Posts: 18
Joined: 08 Dec 2010
Location: Stanwood WA USA

PostPost by: elj221c » Tue Jul 05, 2016 9:01 am

Hawksfield wrote: Also mine is a straight tube.


Indeed so is mine. I thought they all were?
Attachments
untitled-21.1.jpg and
Roy
'65 S2
User avatar
elj221c
Fourth Gear
Fourth Gear
 
Posts: 633
Joined: 12 Sep 2003
Location: Surrey Hills, England

PostPost by: rgh0 » Tue Jul 05, 2016 9:47 am

The bent tube is for a rear bowl sump engine such as used on Escorts

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 7511
Joined: 22 Sep 2003
Location: Melbourne, Australia

PostPost by: billwill » Tue Jul 05, 2016 1:34 pm

rgh0 wrote:The bent tube is for a rear bowl sump engine such as used on Escorts

cheers
Rohan



I'm puzzled because such an engine will presumably not fit in a Lotus, yet the original Poster said his problem is for a Lotus engine.
Bill Williams

36/6725 S3 Coupe OGU108E Yellow over Black.
billwill
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 4721
Joined: 19 Apr 2008
Location: London UK

PostPost by: h20hamelan » Mon Feb 03, 2020 4:01 am

2cams70 wrote:Hi Guys,

I'm wondering whether anyone has had issues with the press fit used on later pickup pipes becoming loose. In my younger days scouring wreckers yards when English Fords were everywhere I well remember taking the sump off a newly reconditioned crossflow engine I was going to purchase only to find the crankshaft and it's bearings totally destroyed. On closer examination I found the oil pickup pipe to be loose at the press fit interface between the pipe and the block. It was obvious that the oil pump had been sucking in air at this point rather than oil from the sump!

I don't want the same thing to happen to my Lotus engine and as it is currently the press fit seems to be a bit loose. Do you guys have any recommendations regarding how to restore/improve the press fit or a suitable sealant to use at this joint? The pickup is the big wing type so unfortunately I cannot easily find a replacement because the Elan/Cortina type is different.

Photos of the pickup and of the press fit section are attached for reference.

Regards


And the few I have noticed are straight

RDENT

C4F39CE6-2F0B-4226-94FB-59BDC5F18B38.jpeg
C4F39CE6-2F0B-4226-94FB-59BDC5F18B38.jpeg (33.17 KiB) Viewed 1112 times



The swinging one was bent. From a recent post. Maybe that one has to be.

I suppose on long sweeping corners the baffles do their thing (CeeJay design). And the largest accusump does not have enough in reserve. I suppose its all a moot point as things have been this way for 50 years. So outside of a dry sump...

Maybe I am missing something. I am hoping to be ready to make baffles and secure a “swagged” oil pick up tube with 641 “loctite bearing” i think it was.

Sort of surprised there is no stainless safety wire or the like...
W. Kootenays B.C. Canada
Born, and brought home from the hospital (no seat belt (wtf)) in a baby!
Find out where the limits are, and start from there
User avatar
h20hamelan
Third Gear
Third Gear
 
Posts: 497
Joined: 25 Sep 2010

PostPost by: rgh0 » Mon Feb 03, 2020 4:26 am

The original post from some time ago was by 2cams70 and he has a couple of twincam escorts with the rear bowl sump and hence the bent pick up compared to the straight press in one in the Elan. If you modify the sump for the swinging baffle design up then you need to modify the pickup tube to add a bend to bring it to the centre of the sump if using the press in style block

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 7511
Joined: 22 Sep 2003
Location: Melbourne, Australia

Total Online:

Users browsing this forum: No registered users and 8 guests