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-   -   Drivetrain "rebuilding" the engine (https://www.northamericanmotoring.com/forums/drivetrain-cooper-s/243694-rebuilding-the-engine.html)

mgrant 01-19-2013 10:08 AM


Originally Posted by ClintTheMiniOwner (Post 3660888)
I have my mini apart right now to change pistons and do head touch up. I didnt have to take the engine completely out which was nice but the gaskets all come in a set so you will get all the gaskets anyways. Check out thumper heads and revolution heads. Thumper has a few options to look at. Maybe you can work out a deal on a good core w the vender if yours is cracked... The rocker assembly is touchy on these heads so you want a mini experienced machinist to do it. Trust me I have had my head off 4 times. Also get ARP head bolts in case you have to take it off again! it will pay off since you can use them multiple times.

I will have the head ported by a professional here. Mostly just a port matching job and a quick polish for now ... I dont have 2K to drop on a hean right now

Also thx i will go with the APR studs since i plan on maybe opening up the head in the future again

What should i be llooking for in the rocker assembly ?


Originally Posted by bmwr606 (Post 3661702)
am i missing something here? OP says he found water/antifreeze in the oil ...

i see no mention of at least looking at the rod big end and crank main bearings?

and what about checking the piston to cylinder fit, ring fit in the piston lands, the ring end gap, wrist pin to rod and wrist pin to piston?

no sense at all putting a new head on a bottom end ready to grenade

scott

Like mentionned before ... blown head gasket is the modt obvious choice ... but when everything will be opened (since i plan on upgrading everything at the same time) I will have a look at the piston rings for signs of degradation



Lastly i do not plan on touching the valve openings/sizes for now just to avoid any further problems ... but maybe in the future ... one never knows

ClintTheMiniOwner 01-19-2013 10:32 AM

The only thing you have to worry about with the rocker arms is when you set them back in place. The little plastic retainer rings can get pinched. Have your head guy check to see if the cam rocks back n fourth when its dry and all apart. Or clamp down the cam with the cam bearing caps only without rocker arm shafts and see if the cam gets tight. It needs to spin freely. And get a "newman cam" in there!

ColinGreene 01-19-2013 10:19 PM

Again its Colin, but anyway.
Sounds like if you had a really high quality head it would be sorted
Sad to see mini mania could not cover that.
good luck with the rebuild

ZippyNH 01-19-2013 11:15 PM


2005 R53 badly overheated and now it wont start
One question....ever find the cause of the water in the oil? Or WHY it would not start/run?
You have lots of good preventive MX stuff listed, but did you actually fix anything or just take it apart, the reassemble it? I understand you just hoping the bottom end is OK, but if it is all apart, did you check the pistons/rings? block for SQUARE and the head? YOU know it was overheated badly..and would not run...find out WHY it would not run...the head gasket can be CAUSE or EFFECT....
Sounds like you have lots of good parts and a decent plan, hopefully it will be running soon!
My gut says if you have a CAM, you will want bigger injectors and a tune when you can scrape up the cash!!

ClintTheMiniOwner 01-20-2013 09:46 AM

I found my old shrick cam if youre interested- i wish i could erase. I guess both my cams in my garage are stock. I though one was a shrick. Not sure if they are worth anything. -sorry

mgrant 01-20-2013 05:43 PM


Originally Posted by ClintTheMiniOwner (Post 3662976)
I found my old shrick cam if youre interested- i wish i could erase. I guess both my cams in my garage are stock. I though one was a shrick. Not sure if they are worth anything. -sorry

Thx but i think im going to leave the head/cam as is for now and wait for the summer and more cash flow in order to change the head/cam/injectors and a tune all at once ... dunnno

Would it be ok to just change the camshaft for now eventhough the car has about 140000km (87.5k miles) ... could putting a new camshaft with old valves and seals cause a problem ???


Originally Posted by ZippyNH (Post 3662796)
One question....ever find the cause of the water in the oil? Or WHY it would not start/run?
You have lots of good preventive MX stuff listed, but did you actually fix anything or just take it apart, the reassemble it? I understand you just hoping the bottom end is OK, but if it is all apart, did you check the pistons/rings? block for SQUARE and the head? YOU know it was overheated badly..and would not run...find out WHY it would not run...the head gasket can be CAUSE or EFFECT....
Sounds like you have lots of good parts and a decent plan, hopefully it will be running soon!
My gut says if you have a CAM, you will want bigger injectors and a tune when you can scrape up the cash!!

car wasnt starting since the gasket broke between cylinder 1 and 2 (checked the spark plugs and they were really wet). Car could start with only one cylinder not working although it would really not work well. But since i had water in two cylinders it was impossilbe for the car to start


Now i just need to wait for the parts to arrive ... hope its soon

mgrant 02-17-2013 05:22 PM

1 Attachment(s)
lots of water in cylinders 1 and 2 was found


At least now car is reassembled but when we came to start it up we found a fuel leak
Now we just have to find that LEAK

ColinGreene 02-17-2013 06:49 PM

Fuel Leak, Just check the barb fitting on the fuel rail. I have had them not seat all the way before.
its pretty uncommon to have a bad fuel leak on these cars.

mgrant 02-18-2013 11:19 AM


Originally Posted by ColinGreene (Post 3681296)
Fuel Leak, Just check the barb fitting on the fuel rail. I have had them not seat all the way before.
its pretty uncommon to have a bad fuel leak on these cars.

perfect ll check that very soon and report back ... im sure its not a big problem

Helix13mini 02-18-2013 11:28 AM


Originally Posted by mgrant (Post 3681232)
lots of water in cylinders 1 and 2 was found


At least now car is reassembled but when we came to start it up we found a fuel leak
Now we just have to find that LEAK

That water falls into the cylinder when removing the head, not when the car is running (or it would stop running in a great hurry). Good luck with your fuel leak.

ColinGreene 02-18-2013 06:28 PM

^that.

mgrant 02-28-2013 11:34 AM

so the fuel leak headed up being a worn out gasket on injector 1. the gasket in question is the one between the fuel rail and the injector ... parts should arrive sometime tmrw morning

Now a quick question regarding injectors. When i took the fuel rail out i had to leave the injectors in the intake manifold since i could not get them out. Unfortunatly when doing so i removed the retaining clips on the injectors.
Now when comes time to put everything back together I was wondering where in which groove of the injectors did the clip go into. Is it the one closest to the fuel rail (goes completement around the injector) or is it the lower one (groove on either side) ???

Also are there any tips for installing the fuel rail with the injectors already in the manifold ?

Thx in advance

martinb 02-28-2013 06:10 PM

'Can't help you with your question, but if one gasket is worn out, the others are likely mostly worn as well. I'd replace all four.

mgrant 02-28-2013 11:18 PM


Originally Posted by martinb (Post 3689036)
'Can't help you with your question, but if one gasket is worn out, the others are likely mostly worn as well. I'd replace all four.

I am only replacing the worn out gasket since i plan on moving to bigger injectors this summer anyways

As for my problem i was able to figure it out ... the clips go on the lower groove and can be snap in place when the fuel rail is pushed down hence i dont need to remove the injectors as of yet

mgrant 03-01-2013 12:54 PM

Well after 2 months of not having a car and having to run around to gather parts. Multiple nights of dispair thinking to myself that i would never finish.

THE JOB IS COMPLETED !

Now i cant wait to go for a long drive

ColinGreene 03-01-2013 08:08 PM

I would replace all 8 0 rings its about 12 dollars, also make sure that your fuel pressure regulator hose is hooked up.
Glad to see that you are up and running.

mgrant 03-02-2013 08:29 PM


Originally Posted by ColinGreene (Post 3689822)
I would replace all 8 0 rings its about 12 dollars, also make sure that your fuel pressure regulator hose is hooked up.
Glad to see that you are up and running.

Reason i didnt change all the orings is that they are 11$ each here in montreal if bought from the dealer. so 12*11=$132 plus taxes
As mentionned the injectors will be changed this summer so ...


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