
How Hard Is It To Do A Cam Change?
#1
Posted 13 February 2013 - 02:56 PM
My question is, is it really 1400NZD BIG? I have worked on a lot of evo's before, engines in and out, g box in and out, clutches, transfer box's, rear diffs, replacing cams, manifolds, turbos, you get the drift even when I paid someone to take my gear box out it cost 400 bucks and taking out a gearbox is 5% away from taking out the engine. Those of u who have worked on AWDs know its a PITA!! I would have thought the mini wouldn't be such a mission compared to say an evo?
#2
Posted 13 February 2013 - 03:09 PM
It's engine out yeah, I'd say head off or at least pushrods out, timing gear off which will need resetting, that should be all?
Think of the labour going into stripping ancillaries off to remove an engine and then put it all back.
Do it yourself! Get someone else to do the tune ;)
#3
Posted 13 February 2013 - 03:25 PM
#4
Posted 13 February 2013 - 03:27 PM
You do have to pull most of the top engine apart, an build back up again.. And if it doesn't have follower covers on the back you have to slip from the gearbox to get the followers out and install newuns.
That's where the cost is.
#5
Posted 13 February 2013 - 03:27 PM
#6
Posted 13 February 2013 - 03:28 PM
#7
Posted 13 February 2013 - 03:45 PM

Strangely I didn't ask him to demonstrate the concept on my car!!

#8
Posted 13 February 2013 - 03:55 PM
Last time I put my mini on Peter Baldwins rolling road (and he told me that my cam was probably knackered!!) he told me that he used to change cams at the trackside with the engine still in the car!! He reckoned he did it by removing the rad, taking the nearside front wheel off, cutting/pulling a couple of the slats in inner wing out of the way and then rolling the car on it's side onto a mattress, and doing it all under the wheel arch through the inner wing!!
Strangely I didn't ask him to demonstrate the concept on my car!!
Thats how you do it on a engine with tappet chest covers
#9
Posted 13 February 2013 - 04:13 PM
#10
Posted 13 February 2013 - 04:15 PM
So it's: remove engine and gearbox, remove clutch & flywheel, remove head and push rods, remove engine from block, remove front pully & timing cover, timing gears & timing chain (good time to change the chain as well), remove engine front plate. With engine turned to rest on the block face pull out camshaft, remove cam followers.
Then do all this in reverse.
AS for man hours, allow 3 to 4 hours for getting the engine out, 4 to 5 hours for the strip and re-assembly with the new cam, and 5 to 6 hours to re-install the engine. Thus a minimum of 12 hours and up to 15 hours for the entire job.
Wise to change the oil pump whilst doing this job and to check for clutch wear. Perhaps a new 'red' primary gear seal as well.
#11
Posted 13 February 2013 - 05:30 PM
It may take very nearly as long as taking the engine out, because it is fiddly. And, if you drop one tappet, you WILL be taking the engine out.
#12
Posted 13 February 2013 - 07:43 PM
#13
Posted 13 February 2013 - 07:53 PM
#14
Posted 13 February 2013 - 08:57 PM
I would check the crank end float as well, if its a recently recently rebuilt engine then it should be within tolerance, if it isnt then something is amiss.
check the cam liners as well for wear.
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