2 door VAE 306H

Let us all know what you are up to with your current restoration project. Get that Minor on the road!
kevin s
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Re: 2 door VAE 306H

Postby kevin s » Sun May 23, 2021 7:13 pm

Been away for a week, but got an hour on the minor today.

I think aside from checking the cam endfloat and cam timing everything else is ready to assemble on the bottom end, So I moved onto the head.

First thing i needed to do was fit the new inlet valve guides. As I didn't have time to go round my parents and make a punch on the lathe I knocked the old ones out with a punch about a mm smaller than the outside diameter. To get the new ones in I made a punch out of an old valve guide and the stem off on old valve
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Worked a treat and they knocked in with no problems.

Next up was having a go at the ports, given we are keeping the standard valve sizes there is no point going mad, so based on vizards book the plan is to clean them up around the guide and just behind it where the port is at it's narrowest and ìncrease the small radius behind the valve seat.

With the new guides fitted they looked like this.
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So after some work with the die grinder I had this.

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Could still do with a bit of refining, but already it's looking far less restrictive than it did to start with, I've roughef out all the exhaust ports and one inlet just need to do the other 3 and also the other 3 combustion chambers.

kevin s
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Re: 2 door VAE 306H

Postby kevin s » Thu May 27, 2021 12:36 pm

The combustion chamber and porting work on the heads is all done.
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The combustion chambers come out at 24cc each which works out at 9:1 static, with a fairly tame cam this should work fine.

Just need to grind the valves in (the engine machinist did do it when he fitted/cut the new seats but we have stainless exhaust and new guides on the inlet now) and assemble it all now.

kevin s
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Re: 2 door VAE 306H

Postby kevin s » Wed Jun 09, 2021 8:08 pm

For the last couple of weeks I have been rebuilding our conservatory, now we have windows, doors and a roof I can take a break here and there to play. So I have begun re-assembling the minor engine. Flushed all the oil galleries out with brake cleaner then begun assembly. Firstly fitted the oil slinger, used the rear main cap to line it up.
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Then fitted the mains lubed with engine oil.
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Followed by the crank, thrusts and caps. Threads and bolts were washed in brake cleaner then fitted with loctite.
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Pistons were then fitted to rods, one gudgen pin was a bit tight on the rod but a light going over with wet and dry freed it up.
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kevin s
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Re: 2 door VAE 306H

Postby kevin s » Wed Jun 09, 2021 8:12 pm

Compressed rings.
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Tapped all the pistons in torqued the big ends up with loctite and no tabs as per the mains.

All turns nicely, next up is the front cover, need to countersink the 2 bolts to clear the duplex chain first though.
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kevin s
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Re: 2 door VAE 306H

Postby kevin s » Thu Jun 10, 2021 9:03 am

Before work I measured the camshaft endfloat, came out as .07mm or 2.7 thou, spec seems to be 3 - 7 thou and I would rather be towards the upper end of this (certainly don't want it below), looks like I need to machine a bit off the sprocket.

philthehill
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Re: 2 door VAE 306H

Postby philthehill » Thu Jun 10, 2021 9:36 am

To increase the clearance/end float - machine off the face indicated in the photo below as required.
Cam gear 2.JPG
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Last edited by philthehill on Thu Jun 10, 2021 9:42 am, edited 1 time in total.


philthehill
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Re: 2 door VAE 306H

Postby philthehill » Thu Jun 10, 2021 9:37 am

Attaching a photo has again taken a turn for the worse. :cry:
Attachments
Cam gear 2.JPG
Cam gear 2.JPG (1.6 MiB) Viewed 265 times


kevin s
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Re: 2 door VAE 306H

Postby kevin s » Thu Jun 10, 2021 2:02 pm

All the photo's seem to have gone belly up!

I assume you are referring to the shoulder on the sprocket the front of the triangular plate abuts to, it was my plan to mount it on the lathe and skim a little off there.

philthehill
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Re: 2 door VAE 306H

Postby philthehill » Thu Jun 10, 2021 3:36 pm

Still no good on the photo front.
To increase the clearance take a slight skim off the main rubbing face not the front face of the boss.
Cam gear 2.JPG
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kevin s
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Re: 2 door VAE 306H

Postby kevin s » Fri Jun 11, 2021 9:14 pm

Yes that's what I was thinking, hopefullyget a chance to go round my parents and put it on the lathe tomorrow.
I'm doing bits as I can before and after work (one advantage of working from home) so I've now fitted the oil pump.
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Coutersunk the front plate screws.
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Also Fitted the oil filter housing, fuel pump blanking plate and ball type relief valvebut can't fit 3 core plugs, the dizzy and oil feed pipe with it on the stand though.

Today I looked at fitting the backplate, got the original out and noticed this.
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So I got the spare one out but the dowel was corroded in the top, decided to knock it out and this hapened.
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kevin s
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Re: 2 door VAE 306H

Postby kevin s » Fri Jun 11, 2021 9:25 pm

I was amazed to find it is made of cast iron, not suprised they crack!

A pain but it doesen't really affect it's function so I progressed to fit it then found a bigger problem, it wouln't fit over the oil pump, laying over the original.
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All the other holes line up but the oil pump one is about 5mm different, I guess it may fit over a standard pump but it would barely be clamped on the gasket.

So in the end I refitted the cracked one (oil pump hole is a perfect match for the block) the crack isn't going to get any worse and we will be changing it with the mazda gearbox eventually anyway (that one is steel too).

Also fitted the flywheel and clutch and started lapping the valves in, If I can get the sprocket done tomorrow I hope to wrap up the bottom end.

philthehill
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Re: 2 door VAE 306H

Postby philthehill » Fri Jun 11, 2021 10:09 pm

Cracking between the oil pump aperture and the crankshaft aperture is a common fault with the 'A' Series and more so on the 1275cc engine rear engine plate Pt No: AEG552.
The 1098cc rear engine plate Pt No: 12G275 is less prone to cracking but it can still happen.
The 1098cc & 1275cc oil pump apertures are not aligned in the rear engine plates. The plates cannot be easily interchanged.
You do need to fit the 12G275 rear engine plate to a 1098cc block and a AEG552 rear engine plate to a 1275cc block.


kevin s
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Re: 2 door VAE 306H

Postby kevin s » Sat Jun 12, 2021 8:01 pm

Turned a little off the sproket today.
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Then tried it.

Fully rearwards at zero.
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Fully forwards 0.15 mm.
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So 6 thou float, so within spec.

Hopefully timing chain etc tomorrow.


The plate I started out with for the mx5 box conversoion was a marina one(gerabox bolt pattern and starter position), that is steel and the holes all line up with the 1098 engine, did they do a 1100 marina?

philthehill
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Re: 2 door VAE 306H

Postby philthehill » Sat Jun 12, 2021 9:25 pm

BL did make a 1098cc engine for the Marina with a prefix of 10V.
The rear engine plate Pt No: 22G1693 was fitted to the Marina 1098cc and Marina 1275cc 12V engine.


kevin s
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Re: 2 door VAE 306H

Postby kevin s » Mon Jun 14, 2021 8:45 pm

Further progress.

Timing chain fitted,
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Tdc cheched.
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Marked on flywheel so I know where tdc is when I check the cam timing.
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Turns out the marks on the mini pulley are not far out either.
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kevin s
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Re: 2 door VAE 306H

Postby kevin s » Mon Jun 14, 2021 8:50 pm

Fitted the head studs and water pump
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.

Then fimished off the head, last of the valves lapped in.
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Valves fitted.
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New exhaust valves /seats mean the exhausts sit a bit lower.
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But I don't think this will be an issue, I will check the springs don't go coil bound later.

After sealing and fitting the bypass tube I dropped the head on.
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Last edited by kevin s on Mon Jun 14, 2021 9:07 pm, edited 1 time in total.

kevin s
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Re: 2 door VAE 306H

Postby kevin s » Mon Jun 14, 2021 9:02 pm

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Fitted the followers with cam lube, push rods and rocker shaft, then torqued all the head bolts to 40lbft.

Still need to set the valve clearances, and check the valve timing, at the moment the sump and front cover are on loosely until I have done this.

Then for future referance I tried the twin carbs on, obviously something is going to have to change with the bresther.
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We have this but I'm not really happy venting to atmosphere.
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.

I think the best option may be one of the aftermarket ones which goes in the fuel pump hole or a remote tank


Only a couple of issues, gasket sets don't include o rings for the side cover centre bolts, copper washers for the oil filter pipe or the rubber grommets for the rocker cover, I have found some O rings , will anneal the old copper washers and for now use secondhand rocker cover grommets.

philthehill
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Re: 2 door VAE 306H

Postby philthehill » Mon Jun 14, 2021 11:12 pm

This is what you need to clear the manifold:-

https://www.ebay.co.uk/itm/293048425169 ... SwIBJaeOnc


kevin s
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Re: 2 door VAE 306H

Postby kevin s » Tue Jun 15, 2021 1:34 pm

Went for plan C taking a pie cut out of the one we have and re-welding it, probably pretty much re-creating the one Phil linked to.
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It didn't really need doing at the moment as we are initialy using the original carb but I thought it would be easier to sort out with it on the stand.
Last edited by kevin s on Tue Jun 15, 2021 5:57 pm, edited 1 time in total.

kevin s
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Re: 2 door VAE 306H

Postby kevin s » Tue Jun 15, 2021 4:50 pm

Pretty much finished the engine now, this morning I checked the valve timing, protractor on crank, pointer made out a bit of garden wire set to zero degrees and dial gauge on no1 inlet valve.
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Did 3 measurements and they all came out with peak lift around 251-252 degrees. Cam timing is supposed to be 109 ATDC so that is pretty much spot on (360-109).
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With that I fitted the front cover and sump.
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Need to wait for the paint to arrive then there is just the crank pulley and distributor coil plugs and oil pipes covered by the stand to do. As it's going in from underneath the carb and manifold will go on when it's in the car.
Last edited by kevin s on Tue Jun 15, 2021 5:58 pm, edited 1 time in total.


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