11 replies to this topic

[Willpill20]

Hi I have got my engine built up to the point where you do the cam timing . I have done the timing and got a 167.25 degrees . I know that this is completely wrong as it is supposed to be timed at 107 degrees. I have tried to adjust this so many times (more then 30 times) but it just makes it worse someone please help me
Thanks

[Avtovaz]

what exactly are you doing to get that figure? what s the set up for finding tdc, etc?

Edited by Avtovaz, 14 September 2021 - 04:35 PM.

[Willpill20]

I got my dial indicator got the 1st piston closest to the heater pump to tdc , the put on my degree wheel thing and put it to tdc with the piston , then moved the dial indicator to the 1st inlet pushrod and got that to tdc . I then zeroed the dial indicator then span the engine backwards to 0.005” and get 2.5 degrees . I then turn it back forwards to get to 0 the forwards to 0.005” again and get 332 . Add then up and divide by 2 I get 167.25 . I’m new to this stuff and am very confused . It looked a lot easier then I thought .
Hope you can help
Thanks

[Avtovaz]

the way i did it, and it is harder on a mini that say my other volvo b230 engine, is to have the engine assembled, with head gasket etc. Then get an old plug, smash the inner out of it, weld a nut onto that, and get a long bolt to go threw it, like this

 

 

 

now get the engine to TDC, turn the bolt until it his no1 piston, then turn the engine over 180 degs, screw your bolt in say 5 turns. 

 

Now bring the engine SLOWLY up to tdc, and when it hits the bolt put your degree indicator to 0, then turn the engine the other way until it hits the bolt, say you get 18 degs, not you want to move your degree indicator to 9 degrees which is half the 18. Now when you turn the engine back you could have 9 degs, and forward 9 degs before. THat is the most accurate way to set tdc imho. remove the plug before going on .

 

 

depending on the cam specs, you may get a lift at for a valve, or you may get max opening at a certain degree. Put the dial gauge on the valve, the top hat bit i forget its proper name ! set it at 0 for when its closed and turn the engine over until you get what the cam specs say. ONLY turn if forward, the engine never goes back, there will be some slack in the links of the chain or anything will knock the reading off. plus also, if the piston is being pulled down the bore when it should be getting pushed up, any play in the size of the piston to bore walls, or little end or what ever will aslo set it out.

 

hope that helps, im not an engine builder but ive done about 5 so far.

Edited by Avtovaz, 14 September 2021 - 05:12 PM.

[Willpill20]

That sounds a bit confusing to me , thanks anyway

[Avtovaz]

like this from about 7 mins

 

CLICK HERE FOR YOUTUBE VID

 

shows it better than i can explain it.

[Timmyquick]

Just finished fitting Evolution001 Camshaft today myself. Went to the hassle of buying a Timing wheel, found a post on this forum how to do it and got 107 degree's bang on. My point being the timing gears were set Dot Dot, so if its a standard timing gear and chain set what was the point? You will get 107 from my experience of doing it today, but I'm still learning!

[minidave54]

I fitted an Evolution 001 cam at the beginning of the year and found lots of useful information for  setting up the timing on line. There are several videos on you tube and a step by step guide in the mini spares technical articles. Not forgetting all the help and articles you will find on this site. Just check your figures and check again, in my case i need an offset woodruff key available from Mini Spares

[Spider]

Hi I have got my engine built up to the point where you do the cam timing . I have done the timing and got a 167.25 degrees . I know that this is completely wrong as it is supposed to be timed at 107 degrees. I have tried to adjust this so many times (more then 30 times) but it just makes it worse someone please help me
Thanks

 

Are you measuring off the Inlet Valve or Exhaust ?  2nd Push Rod / Valve from the Water Pump is the one you want.

[absx2]

Just finished fitting Evolution001 Camshaft today myself. Went to the hassle of buying a Timing wheel, found a post on this forum how to do it and got 107 degree's bang on. My point being the timing gears were set Dot Dot, so if its a standard timing gear and chain set what was the point? You will get 107 from my experience of doing it today, but I'm still learning!

 

Same here funnily enough as I set dot to dot and got 106.5, is pure luck or being machined from a blank are the Evo cams good to go for most people straight out of the box ??

[floormanager]

I fitted one, timed up perfectly at 107 degrees.  Really pleased with the performance, certainly would fit another.

[iain1967s]

My Evo1 was around 102 dot to dot. I brought it back to around 106 with an offset woodruff key.
[More likely to be the dots on the sprockets out a little, than the cam keyway I think]

Seems to run great, very smooth and better than the ST510 I had in my previous build.

 

Are you sure you’re on the firing stroke for #1 cylinder TDC?

2.5° sounds like you’re either on the #4 stroke, or you’re measuring on the exhaust valve as Spider suggests…

 

As a general guide, the 5-thou numbers should be roughly somewhere in the 120° and 90° range.

Edited by iain1967s, 14 September 2021 - 10:22 PM.