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Ken -The 998 Micra Mini (New High Comp 1.3 Engine Build Underway)


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#721 lawrence

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Posted 05 July 2018 - 09:32 PM

Little update
Lower arm pin replaced and suspension all back together and torqued up
29351612858_9bf5844470_b.jpg20180702_095834 by Lawrence Balls, on Flickr

Trigger wheel all ready to weld on
41412868600_5b2b14d37d_b.jpg20180702_110229 by Lawrence Balls, on Flickr

It is welded in now but forgot to get a pic
I also bought the fuel for her and charged the battery.
Tried to start and I'm getting huge backfires through my inlet which is blowing the itbs off the manifold

Now I'm suspecting ignition timing or cam timing, so have bought a timing gun that will hopefully arrive soon so I can check EDIS is timing itself right on default settings.

Also fitted my electric window kit! It's well awesome! Took a bit of tinkering to get it to fit right but works wellish now. I need new window seals as mine are really rigid and breaking up in places!
41412868010_8637bdcc60_b.jpg20180704_164718 by Lawrence Balls, on Flickr
43223319971_9c6ed89f04_b.jpg20180704_165514 by Lawrence Balls, on Flickr

Need some new door cards also and some tasty DSN alloy door furniture but that can wait till the engine starts! Might make the cards myself, not sure yet!

More soon

Lawrence

#722 lawrence

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Posted 06 July 2018 - 07:54 PM

Little bugger,

Timing light arrived today, doesn't work at idle, lame.
Played with the ignition via tunerstudios. More backfires and even worse.
Then I sprayed easy start down all the plug and got backfires from both 1 and 4 and then 2 and 3.
Flames in pairs? Had to be something wrong with the timing.
Cam cover off. All fine cams fine, nothing 180 out.
Compression tested. 0, 0, 0, 0
!!!
I blew air down all the sparkplug holes.
Every inlet valve is open whether they are open because of cams or not.
Measured. All inlet valves are open about 2mm

Grr.

Looks like the heads coming off. Bet all the valves are bent. Not even looked at the exhaust. Stupid boy
All for now. Good I've got spare heads. Hope the heads ok if not I'll get another skimmed.

Annoyed at myself. This engine better be amazing when it works.
Lawrence

#723 lawrence

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Posted 08 July 2018 - 11:17 AM




Well yesterday was very enlightening!

 

Bit of stripping

43213005142_177982ea3e_z.jpg20180707_195050 by Lawrence Balls, on Flickr

 

ah

29392387288_08d6d051cf_z.jpg20180707_200616 by Lawrence Balls, on Flickr

43212984112_126771ffa7_z.jpg20180707_200620 by Lawrence Balls, on Flickr

 

So. Yh I laughed hahah. Had to really. Think I should stop making engines yet?!!

 

As always with me. Things don’t go great!

 

Close ups.

43212968452_49b85f787a_z.jpg20180707_201124 by Lawrence Balls, on Flickr

42358065645_e7a0a2ab1c_z.jpg20180707_201919 by Lawrence Balls, on Flickr

 

minimal bends there!

 

Where they kissed the seats

43212829072_a8cebc83a8_z.jpg20180707_201941 by Lawrence Balls, on Flickr

 

hahahah

42358067265_a4c81fa9f3_z.jpg20180707_203144 by Lawrence Balls, on Flickr

 

But its not all bad. I can see no cracks at all. All this damage has been done at cranking or manually turning the engine. 

 

Head first. 

 

Exhaust valves are all perfectly fine and undamaged. It appears that there is zero damage to the head itself. I trial fitted some spare inlet valves. No damage to any of the valve guides and the valve seats look perfect still. 

41452613040_100e5bbbf3_z.jpg20180707_201840 by Lawrence Balls, on Flickr

 

No leaks on cylinder 4. Valves sealing fine. Ill clean up the rest of my spare valves and trial fit them. If none of them leak or minially leak without lapping then I would say this head is good to go again!

 

And back to the block

43212968452_49b85f787a_z.jpg20180707_201124 by Lawrence Balls, on Flickr

 

The marks on all the pistons are very superficial, it appears the valves hit the piston and then were all forced backwards into the cylinder wall. This has pushed the aluminium up. The pockparks were on the crown already if people are interested. But, where the rings run haven’t been touched. Theres no marks on the cylinder walls.

 

So ive not damaged the liners but have come very very close. 

 

Plan – Test the valves. Assess block and maybe gently dress the bent aluminium down to level it again.

 

Sure there’s a risk it might not work when its all back together but for the cost of a headgasket which I already have im happy to risk it. And buy some breakdown cover.

 

All for now. Updates tommorow

Lawrence



#724 lawrence

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Posted 10 July 2018 - 08:33 PM




So time to catch up with a few days work

 

Yesterday I had a little supervisor to keep occupied so couldn’t do as much as I liked

28434342327_7e351c5b9f_z.jpg20180709_103415 by Lawrence Balls, on Flickr

 

So I lapped the valves in. 

28434248547_f1d337be9b_z.jpg20180709_110815 by Lawrence Balls, on Flickr

 

all sealed nicely

28434146777_ef044c4a2a_z.jpgreceived_10214498095878085 by Lawrence Balls, on Flickr

 

dressed the marks down on the block gently

41493968530_4a2dc2081a_z.jpg20180709_110046 by Lawrence Balls, on Flickr

28434278477_44716a7a81_z.jpg20180709_110051 by Lawrence Balls, on Flickr

 

ordered the headgasket kit

and made a little plane out of various bits lying about.

42585169044_ede06cb575_z.jpg20180709_170009 by Lawrence Balls, on Flickr

Might make a few more and sell them. Think it took me an hour or so to make it. Im going to make a few more and if I can get it made in less than half an hour see if I can sell them for £15 or so. Ill sort some stainless steel out too. 

 

Then onwards to today

Gasket set arrived

28458627067_7ae975b98a_z.jpg20180710_111007 by Lawrence Balls, on Flickr

 

compression tested – all about 250 again which is awesome!

43327528581_62230d3e1c_z.jpg20180710_130658 by Lawrence Balls, on Flickr

43277853222_38e6217647_z.jpg20180710_130939 by Lawrence Balls, on Flickr

 

modified and improved alternator mount fitted, I cut my hand badly on the rough one. This has nicely smoothed edges and the outer bar has stiffened it up more

43277797782_09c140ce76_z.jpg20180710_173606 by Lawrence Balls, on Flickr

 

Then I attacked the battery and started her up.

28458548447_d763494222_z.jpg20180710_193808 by Lawrence Balls, on Flickr

Oil pressure at idle is nice and solid, fast idle 35 ish. No rev counter so not sure how high, just done by ear. 

 

Drove her back and fourth a few times. 

42609757954_1b628f7e1e_z.jpg20180710_194607 by Lawrence Balls, on Flickr

 

So that’s that. Engine works. Bit smokey at first start but soon went away. Bought up to temp and kept at a high idle to bed the rings in best I could.

 

Few issues still

>Alternator is not charging the engine still!

>Quite a large oil leak  the clutch side of the engine, had a look underneath and the end seal on the sump is misplaced a little and is weeping from there – not something I can fix without sump off so that’s something to do. 

 

All for now.

Glad the engine runs nicely

 

Lawrence



#725 l_jonez

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Posted 13 July 2018 - 12:01 AM

Keep at it. If it was easy everyone would do it 






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