Main Bearing Change, some help required
Turbo Mini Forums

Hi, as i'm off uni for next week i was planning to try and fix my low oil pressure while at my dad's. Was just looking for some tips/tricks to help, as this will be the first time i've had the engine out the car.

I dot really have much idea what we'll need, but so far i' looking at Mains Bearings and Gaskets required for reassembly.

Hopefully i'll have a MG Metro cam, high flow oil pump and X pin diff to fit at the same time.

Just have a few questions, such as what gaskets i'll need, any special tools required to separate gearbox and block, do i need to replace piston rings if they are removed? or can i just detach the con-rods from the crank, remove the crank and leave the pistons in the bores?

Are there any other jobs that are worth while i have the engine out and in bits? in preparation for fitting a turbo or just general maintenance

these are the Bearings i've been looking at:
http://www.minispares.com/Product.aspx?ty=...=0&tc=1#submenu

couldn't find the A+ ones on the website though?

If it helps, the engine is and A+ 998, with (i'm assuming) standard internals.

Cheers,


Mike

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Centre oil pickup pipe is definitely something to fit whilst the engine is apart, if nothing else.

If you are changing the cam, you will need to change the followers. DO the head gasket while you are at it. Try and use genuine gaskets where you can.

Oil pickup will be a bit of a job if you've never had an engine apart before.

Okay, thanks, the cam change will be dependant on whether I can source one by next week.

As for the oil pick up, I'll definitely try and get one. Why will it be difficult if I havnt had the engine apart? Apparently the engine was rebuilt 20 thousand miles or so ago, so I assume that means it was apart?

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

You'll need a flywheel puller and obviously a torque wrench. Your best bet is to just buy a complete engine gasket set.

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1/4mile in 13.2sec @ 111 terminal on 15psi

Just difficult in terms of being a fidly PITA to get the lay gear etc out if you've never done it before.

Ahh, fair enough, thanks for the heads up.

we have a week to do it, so if we cock it all up or something that should be enough time to get it all back together...

I'll start reading up on the process of taking it out and getting it apart

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

might be worth changing the oil pump while your there also!

im not sure about theavailability of 998 hi flow oil pumps. if you cant find one just fit astandard 998 one or even with a little mod fit a 1275 one but this involves drilling and tapping a hole in the block and grinding down the shaft of the pump. but is simple. the kent 500 cam is same as mg metro you can get thesenew if time is an issue and dont order the bearings untill you got the engine apart as the crank might need regrind but fingers crossed it wont.

My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901

Yep definitely change the pump, especially as you have pressure problems. It might turn out that the mains are fine and its the pump thats worn.

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1/4mile in 13.2sec @ 111 terminal on 15psi

Right then, ive spoken to people on here before about oil pumps, and it seems a modified metro turbo one is the way to go, I'm sure I can find the info on how to convert one on here, but where's the best place to get one?

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

A standard pump will be fine. Don't let urban myths get to you.

dont you want to turbo it eventually? That was my thinking and the reason i said about the 1275 pump as when a turbo is fitted the availability of more oil flow is ideal. But a standard pump on good engine should have enough flow. But the choice is yours

My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901

Why do you need more oil pumping round? The extra will make it as far as the pressure relief valve and then get dumped in the sump...

for the turbo if he fits one. Why do metro turbos have larger capacity pumps than standard 1275's?. He said he was going to fit a hi flow 998 pump i just advised there is a cheaper more available option. But like i said its his choice

My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901

maybe they had a different strength spring in the metro turbo...

Okay, bit of an update on this, the thought is that rather than just changing the bearings myself, and probably making a hash of it, i'm looking into getting the engine completely refurbed by someone who knows what they're doing.

This thought process has been brought on by several other problems, such as oil leaks and the like, but also as it would be an opportunity to make the engine suitable for more boost than i was planning, so i can turn it up without blowing holes in my pistons. I was also considering a bore out?

The only thing is i dont know anyone who can do that, any suggestions? preferably local to me (Hertfordshire).

Thanks everyone

Mike

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0