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post #1 of 7 (permalink) Old Apr 19th, 2017, 01:47 PM Thread Starter
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Engine Rebuild - option advice

Hi all,
haven't been here for many years.
I am in Australia and have recently purchased my old R53 JCW back from the guy I sold it to (missed it). Unfortunately after having it for 3 weeks it seems to have developed a knock and has been diagnosed with a bad crank bearing. Major bummer since the guy who had it had the engine and gearbox fully rebuilt only 20,000 kms ago. Either a bad build or something not maintained correctly, although the guy who had it was pretty particular after spending $12,000 on the engine and gearbox and had serviced it every 6 months.
Anyhow, I am now looking at my options here in Australia with limited tuners specialising in Minis.
I am very interested in using some performance parts and honestly I am looking at building a tougher, faster Mini than I currently have (not withstanding the bum engine).

First of all I'm looking at dropping the sump and making sure that it is actually a bearing that is shot. I drained the oil and there were 2 flakes of a bronze coloured material. About the 2 mm in size. I am no mechanic and people are telling me the engine is shot and I need to rebuild because the metal has probably gone through the engine and wrecked it.

If this is the case, then I have 2 options, buy an recon engine in the UK and get Lohen or similar to build me one, or buy an engine here (found one in a wreckers, Mini hit in side and set off airbags) and bring the parts in.
Any of you guys heard about Mintech Spares in the UK? Cars - Mintech Spares UK BMW Mini Parts

I would definitely like some guidance in terms of parts because I am going to keep this Mini forever and I want to do it right. Need to purchase the right bits.
I do have the JCW kit with the inclusion of a sports cam when it was rebuilt.

Initial thoughts
Lohen head (to replace JCW??)
Headers and high flow cat
SPRINTEX supercharger (any thoughts on this?)
Larger intercooler
Oil cooler
Oil catchcan
Possibly Forged Pistons and rods
FA53 Tuning kit and remote Mynes tune

The other option is get the replacement Cooper S engine I found here in Sydney for $1750 installed and build a kick ass engine out of mine over the next year then substitute.
BTW, anyone who is here in Sydney, do you know anyone who is good with Minis?

Thanks in advance
Andrew


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post #2 of 7 (permalink) Old Apr 19th, 2017, 05:57 PM
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Originally Posted by Boo View Post
Hi all,
haven't been here for many years.
I am in Australia and have recently purchased my old R53 JCW back from the guy I sold it to (missed it). Unfortunately after having it for 3 weeks it seems to have developed a knock and has been diagnosed with a bad crank bearing. Major bummer since the guy who had it had the engine and gearbox fully rebuilt only 20,000 kms ago. Either a bad build or something not maintained correctly, although the guy who had it was pretty particular after spending $12,000 on the engine and gearbox and had serviced it every 6 months.
Anyhow, I am now looking at my options here in Australia with limited tuners specialising in Minis.
I am very interested in using some performance parts and honestly I am looking at building a tougher, faster Mini than I currently have (not withstanding the bum engine).

First of all I'm looking at dropping the sump and making sure that it is actually a bearing that is shot. I drained the oil and there were 2 flakes of a bronze coloured material. About the 2 mm in size. I am no mechanic and people are telling me the engine is shot and I need to rebuild because the metal has probably gone through the engine and wrecked it.

If this is the case, then I have 2 options, buy an recon engine in the UK and get Lohen or similar to build me one, or buy an engine here (found one in a wreckers, Mini hit in side and set off airbags) and bring the parts in.
Any of you guys heard about Mintech Spares in the UK? Cars - Mintech Spares UK BMW Mini Parts

I would definitely like some guidance in terms of parts because I am going to keep this Mini forever and I want to do it right. Need to purchase the right bits.
I do have the JCW kit with the inclusion of a sports cam when it was rebuilt.

Initial thoughts
Lohen head (to replace JCW??)
Headers and high flow cat
SPRINTEX supercharger (any thoughts on this?)
Larger intercooler
Oil cooler
Oil catchcan
Possibly Forged Pistons and rods
FA53 Tuning kit and remote Mynes tune

The other option is get the replacement Cooper S engine I found here in Sydney for $1750 installed and build a kick ass engine out of mine over the next year then substitute.
BTW, anyone who is here in Sydney, do you know anyone who is good with Minis?

Thanks in advance
Andrew
i've been buying broken mini's for years and doing rebuilds on them with standard parts, the best way to get a proper race engine built is to go to a engine builders and let them work it all out,, honestly when buying non factory internals its a mine field, conrods and crankshaft and sizes need to be perfect the first time..

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post #3 of 7 (permalink) Old Apr 19th, 2017, 09:39 PM Thread Starter
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Thanks for the reply.
I'm definitely not building it myself and the engine is just for road use, I'm past the track phase of my life for the moment so spirited driving is the deal.
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post #4 of 7 (permalink) Old Apr 20th, 2017, 01:43 AM
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G'day Boo,

You may get some info on who is good with Mini's from James at Masterparts.com.au . He is based in Sydney and is always helpful where he can be.

Regarding the intercooler, unless your tracking there isn't much point in deviating from the standard unit as they are very efficient as is.

Sprintex, very expensive (they are available from Perth) and the only thing I ike about them is that you have a dipstick for the oil reservoir by the snout, not sure about the electric water pump setup.

Consider the cost of sending the SC to GTT in the UK and having it overhauled (not aware of anyone in Oz that does them).

For spirited driving, stick with the JCW head, its already ported on the exhaust ports.

Forged pistons and rods, OEM should be good enough as your not tracking it and regarding the tuning kits, cant comment on them as I am not familiar with them.

If you have the money, drop the SH engine in so you can rebuild your current one or even blueprint it at your leisure, that way your Mini is back on the road.



Oil cooler, prob better than the standard heat exchanger, oil catch can, definitely and something I'm looking to do in the near future considering the oil going through my SC.
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post #5 of 7 (permalink) Old Apr 20th, 2017, 08:41 AM Thread Starter
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Thanks Milpol. The only thing that worries me about the second hand engine is if it turns out to be crap I'll bust another 4k buying and getting it installed. It comes with a 3 month warranty so i suppose I'll get a copy of the warranty and see what is covered in it. Could always buy the engine, install it and get it looked over by a mechanic.
Kind of sucks when all i need really is a decent short block and BMW want to charge $7200 for it with the return of the core..

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post #6 of 7 (permalink) Old Apr 20th, 2017, 08:50 AM
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Mate, must be a wrecker in Syd that has something, also, have you watched the Modmini video where he pulls the engine out. If you have the garage space and some basic tools and an engine hoist or can hire one, its well within the capability of a DIY. Again, give James at Car Parts & Accessories | Masterparts and he may be able to recommend someone local.

Here is the Modmini link, although its a self imposed time challenge, it shows how easy it is with the space to do it.

https://www.youtube.com/watch?v=fie-sUtiNAo

Might also get some help from here.

https://www.facebook.com/clubmininswact/
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post #7 of 7 (permalink) Old Apr 21st, 2017, 02:36 AM Thread Starter
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Thanks mate, that Modmini guy is awesome. Watched 4 hours of that video last night. I actually have a workshop with 2 hoists We do aftermarket stoneguard applications, I might give it a go... Ordered a Serpentine Tool from Masterparts last night. Can buy a 2nd hand engine from the UK for 900 pounds that has 60K kms on it.
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