Ausmini
It is currently Tue Mar 19, 2024 6:38 pm

All times are UTC + 10 hours




Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: Starting a rebuilt motor
PostPosted: Wed Dec 14, 2016 3:48 pm 
Offline
848cc
848cc
User avatar

Joined: Mon Apr 27, 2009 9:18 pm
Posts: 267
Location: South Australia
Hi, I've had my 998 rebuilt and hubby and I will put it back into the car, are there any tips or tricks we should be aware of when starting a rebuilt motor?

Cheers

_________________
It's not the size of the dog in the fight, but the size of the fight in the dog!!

1976 Mini SS
1971 Mini Ute (Custom) - really hubby's but I will claim half :)
1976 Mini SS Shell
Oh and an 850 shell waiting for our dear son to start his resto!


Top
 Profile  
 
PostPosted: Wed Dec 14, 2016 4:32 pm 
Offline
1360cc
1360cc
User avatar

Joined: Sun Apr 11, 2004 11:32 am
Posts: 12390
Location: Sthrn HiLoLands, NSW, Australia
Leave the plugs OUT until you are sure it has Oil Pressure when cranked...

Don't use a really heavy oil...initially

Follow any running in instructions...I assume that the rebuilders would have run in the cam...

If driving it on the road, try and avoid constant speed running...

Watch the temp gauge for any signs of overheating...it is normal for a rebuilt engine to be a little tight and therefore overheat slightly...

Change oil as recommended or at least a couple of times in the first 1000 miles

ohhhh,

and have FUN! :D

_________________
"Show me the Mini!"


Top
 Profile  
 
PostPosted: Wed Dec 14, 2016 6:12 pm 
Offline
1275cc
1275cc
User avatar

Joined: Thu Aug 31, 2006 7:56 pm
Posts: 2651
Location: Muswellbrook -- NSW
Talk to your engine builder , they will advise you on what you need to do , if you built it yourself , make sure you have clean fuel and carby is in good running order , and more importantly make sure you have your timing correct , the last thing you need for a new engine is for it to start popping and banging and cutting out because something isn't right , first initial startup on a new engine is probably the most critical ,check & double check these items .

As for oil , in the past i have used cheap 20W / 50 oil from supermarkets , ( not Friction Modified ) , i've not used any type of running in oil as such , but that's another option , as Mick said change it a few times in the first 1000 K's , to prime the oil pump, you can remove the pipe from the block to the oil filter, and with an oil can , squirt oil directly into the pump ,and with the car in gear , rock the car backwards to prime the pump , do this a couple of times until it's full .


Top
 Profile  
 
PostPosted: Tue Feb 21, 2017 7:40 pm 
Offline
1275cc
1275cc
User avatar

Joined: Sun Jan 21, 2007 9:16 pm
Posts: 3165
Location: North of the Harbour planning my next mini project
I have started a few fresh motors and found for the first 5 minutes they usually get very hot, extractors glow red. I shut down at this point and let it cool down before starting again then all good.
And yes the timing was correct and I changed nothing after starting initially and then the 2nd start. So yes check the valve clearances, check the static timing, check for fresh fuel, turn over with no plugs until you have oil pressure, shouldn't be more than about 15 to 20 seconds, then put the plugs in and enjoy. for the first 20 minutes keep the revs up around 3000rpm to run the cam in It is an idea to check the timing with a light to confirm the static setting was correct, you may need to adjust slightly once running. Good luck!

_________________
1969 Cooper "S"
1967 Mini Deluxe
1973 Clubman Van (the fleet spare)
1978 ex 1275 LS ("Wizard" Eaton Supercharged) :)
2015 HSV GenF GTS(occasional drive & tow car)
2019 MINI F55 Cooper S


Top
 Profile  
 
PostPosted: Thu Feb 23, 2017 11:00 am 
Offline
998cc
998cc

Joined: Fri Apr 01, 2011 8:33 pm
Posts: 1146
On start up you need a period at elevated idle (as has already been mentioned) to bed the cam in.

Then, based on my experience, you really need to make sure the rings are bedded in ... Run the engine under load (but not lugging) at lower/mid range revs .... Find a nice hill and run up it a few times in third gear at, say 3K, revs. The bearings need a nice long run at varying speed, run it up through the revs and then back off.

The trick is not to baby it .. while not thrashing it.

Cheers, Ian


Top
 Profile  
 
PostPosted: Thu Feb 23, 2017 5:24 pm 
Offline
1275cc
1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2571
Location: Brisbane
One 'expert' says on initial start up, run the engine at a higher idle for twenty minutes to run in the cam (without driving), I disagree. I tried his method and ended up with an engine that had rings that didn't bed in.

_________________
The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.


Top
 Profile  
 
PostPosted: Thu Feb 23, 2017 5:40 pm 
Offline
Yay For Hay!
User avatar

Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15856
Location: Wodonga - Vic/NSW border
TK wrote:
One 'expert' says on initial start up, run the engine at a higher idle for twenty minutes to run in the cam (without driving), I disagree. I tried his method and ended up with an engine that had rings that didn't bed in.


yep, totally.... if it's a fresh motor, don't even consider "running in the cam"...

get it driving as soon as you can, lots of hills

_________________
did I tell you that I won a trophy?


Top
 Profile  
 
PostPosted: Thu Feb 23, 2017 6:26 pm 
Offline
998cc
998cc

Joined: Mon Mar 10, 2014 11:38 am
Posts: 1139
Location: Tassie
As a rule at work we run the engines at 2000rpm for 20 minutes when running a cam in.
Havent had an issue with rings yet. I have been told people using different lubrication on the rings when assembling have varied rusults. Touch wood all have been fine so far for me.

_________________
1963 Morris 850 Smoke Grey
1963 Morris 850 Shadow Blue
1965 Morris Mini Smooth Van
1966 Morris Mini Van
1969 Morris Mini Deluxe Resto
5/72 Clubman Gt


Top
 Profile  
 
PostPosted: Thu Feb 23, 2017 9:00 pm 
Offline
1275cc
1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2571
Location: Brisbane
I only use oil on the rings, nothing special.

_________________
The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.


Top
 Profile  
 
PostPosted: Sat Feb 25, 2017 8:15 am 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39617
Location: near Baulkham Hills, NSW
simon k wrote:
TK wrote:
One 'expert' says on initial start up, run the engine at a higher idle for twenty minutes to run in the cam (without driving), I disagree. I tried his method and ended up with an engine that had rings that didn't bed in.


yep, totally.... if it's a fresh motor, don't even consider "running in the cam"...

get it driving as soon as you can, lots of hills

I agree. Idling at high revs for 20 mins is a recipe for glazed rings. Go drive it ASAP after starting, as Simon says.

Edit
and use WD 40 on the pistons and rings, not motor oil. Faster bed in.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


Last edited by drmini in aust on Tue Feb 28, 2017 12:27 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Sun Feb 26, 2017 2:27 pm 
Offline
1275cc
1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2571
Location: Brisbane
I certainly went back to my usual way of running in a rebuilt engine. Bloody experts!!!

_________________
The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

cron

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.