5 replies to this topic

[pete l]

Hi all,

 

How do I go about my first engine start after a rebuild ? 

 

Rebore, new pistons and rings, new camshaft, cam bearings and followers, new crank main and big end bearings.

 

Apparently I have to keep the engine revs up to at least 2000 rpm, at the same time I need to load the engine up to push the rings into the bores to get them to bed and and not glaze up the bores.

 

How do I do all that at the same time ?

 

Pete.

[Icey]

https://www.calverst...in-new-engines/

Mr Calver has (an) answer, but there are many opinions.

[pete l]

Thanks for that. 

[mab01uk]

Also remove plugs, disconnect the coil and crank up oil pressure on starter motor before first starting the engine. If you don't get oil pressure doing this you will need to prime the oil pump. 

(Remove the block to filter head oil transfer pipe where it leaves the cylinder block and insert a pipe/funnel into the hole in the block, then fill it slowly with oil. Put car in gear and push it backwards which will turn the engine backwards, so drawing the oil in and filling the oil pump. Then reconnect the oil transfer pipe and turn the engine over on the starter with spark plugs out, which should now give oil pressure on the gauge...if the pump was primed ok with with the oil you added).

 

 

[Spider]

If the engine has been sitting for a few weeks since doing the build, I'll do the manual prime that mab01uk has referred to soon-ish after getting the engine in and even before doing all the bolt ups. That give the oil some time to drain back through the pump .

 

When it comes to that first start,I'll screw in the idle screw about 1-1/2 - 2 turns and I like to have everything for the car to be ready to drive right away, literally withing it doing those first 30 turns, then I'll go for a short drive (about 400 - 500 metres and bring it back to top up the water and check things over before going a few more similar short drives, but going out further. I have found it quite important to get some load on the engine right away to avoid glazing of the cylinders. You'll also probably need to pick your time of day when to do this so you can best avoid traffic.

 

This is a sheet I would give to owners following an engine rebuild;-

 

 Engine Initial Start & Running In_Page_1.jpg   40K   4 downloads

 

 Engine Initial Start & Running In_Page_2.jpg   34K   5 downloads

[sonscar]

Start it and drive it straight away,use it fairly vigorously with lots of snapping throttle shut to bed rings.Give it twenty miles or so and check vitals.Enjoy.Others will have their own views.Steve..