300 hp N/A carb 2.8 V6 engine

[Purple pit]

Do you think it needed a shim or was it not lined up somehow? Or was it a bolt torque problem and the bolts came loose just enough to take it out of line? Hard to blame the starter, those two look the same.

[veekuusi]

I got a new 3400 reduction gear starter.
150 euros (including tax) , something like $ 170.

[Purple pit]

3400/newer style starter? Just put on a gear reduction myself and now have some teeth missing on the flexplate. Not sure if a shim would do anything for us. Bendix is not a cheap starter, my Airtex kind of was.

[veekuusi]

I got the engine running all right.
But it made an interesting sound.
It took a while to figure out , what was wrong.

Starter motor gave up.
Bendix in the starter motor do not work.
The gear of the starter jammed to the fly wheel .

It takes a few days to get a new starter motor.

[Will'sFiero]

I found a suitable fitting today.
"Reducer" , or what you call it.
I quess it is 1/8 NPT to 1/4 NPT ?

"Reducing bushing"

That must have been something you did then, is that what youcre saying?

The small port 3100 heads had a temp sensor located in that position in many applications.

[veekuusi]

I found a suitable fitting today.
"Reducer" , or what you call it.
I quess it is 1/8 NPT to 1/4 NPT ?

And there certainly was a 1/8 NPT thread in those 3400 heads , that I was using.
The thread was only in one cylinder head (for coolant temp sensor) , I had to make
the 1/8 NPT thread to the other head by myself (first drill a hole of course).

I need those fittings , because the water outlet is in different place in head , I think otherwise
there can remain air in the head .

Learn something new every day. I have never seen a 3400 with that coolant temp sensor in the cylinder head.

Neither have I.

[SappySE107]

Learn something new every day. I have never seen a 3400 with that coolant temp sensor in the cylinder head.

[34blazer]

1/4 npt

Sent from my XT1080 using Tapatalk

[veekuusi]

I think that the thread is 1/8 NPT in the 3400 heads.
The hole in the 3100 heads is 2 mm bigger , some 11 mm.

[SappySE107]

What size is the hole on the 3400 heads?

[veekuusi]

The water plug thread in the new 3100 head is bigger than in the old 3400 head.
I have to get some kind of adapter.




The first race of this 2016 season was this week end. I could not take part in the race.
Next race is in a one months time.
Target is there.

[veekuusi]

Custom intake , for twin Weber 45 mm carbs.
And roller rockers.
But nothing new, you have seen them before.

[Purple pit]

The lip on the sides and bottom will disrupt flow too. That is a no go. Can you cut some of the gasket off the top? Looks like you could if that would be enough. Then it would be down to matching the gasket(cutting and equal amount off first). Also some gasket maker(brush on style) would help seal it all up. I know it's a basic way of thinking, but I'm a basic guy and this is a unique case.

Does leave a lot of blending work to do though.