Engine rebuild and power mods

[makeitfit]

Is that big plug in the inlet manifold what was the blow off?, if so what was it before?

Darn it, I didn't do a pic of that :doh but yes. The blow off valve is a mushroom like gizmo that I think lets go about 1 bar or a bit less.

 

[solarman216]

Bloody 'ell mate, if Carlsberg made threads :bow

Is that big plug in the inlet manifold what was the blow off?, if so what was it before?

It would have been an over boost relief thingy, Pete dont need that, just slows the motor down, Rick

 

[terranosaurusdoug]

Respect for keeping up this thread Pete :thumb2

 

[terranosaurusdoug]

It would have been an over boost relief thingy, Pete dont need that, just slows the motor down, Rick

Is it standard Rick, will mine have one?

 

[solarman216]

Is it standard Rick, will mine have one?

Some do some dont, post some pics of your inlet manifold and I will tell you, Rick

 

[terranosaurusdoug]

Some do some dont, post some pics of your inlet manifold and I will tell you, Rick

Thanks, will do :thumb2

 

[makeitfit]

Found you a pic on google :thumbs
https://www.google.co.uk/imgres?img...ZzaAhVGLMAKHdtNDA0QMwhbKBQwFA&iact=mrc&uact=8

 

[solarman216]

Yep that is one type, there are others, Rick

 

[terranosaurusdoug]

Nice one, I shall have a look :thumb2

Have you altered your intake Pete?

 

[solarman216]

This is what a 2.8 Patrol one looks like

 

[solarman216]

And this is where one would have gone on the Mrs 2.7 T2, and my old T2 is the same cept hers is Boch and mine was Zexel, Rick

 

[Banshee]

Wow!!!! That's wore more than I expected

I'm sure glad mine is nice and thick, feel sorry for all those that took Ricks advice in multiple other threads I've seen and use Aluminium or "an old coke can" :lol :doh

 

[terranosaurusdoug]

Aluminium would not rust like the mild steel has, probably last forever!!

 

[makeitfit]

Pretty sure that plate was a bit of galv.

 

[makeitfit]

Top news, my son sneaked in my valves as a job from his garage :sly Just had them back refaced and ready to lap :clap
Yay happy Mondays

 

[terranosaurusdoug]

And this is where one would have gone on the Mrs 2.7 T2, and my old T2 is the same cept hers is Boch and mine was Zexel, Rick

Mine is like this, a blank, woohoo

 

[makeitfit]

Head build stalled
Had the valves back today. Cut as per Nissan manual, 45 degrees.
Thought I'd be banging the head on tonight but darn it , no cigar.
Valves cleaned up ok

I even checked the shaft no point putting a small shaft in a big hole :lol
Again all within spec :thumbs

BUT, here's where things stalled again. I lapped away expecting an easy session but keep getting double seat points So my thinking is the valve seat is a bit goosed too ?

Question, can I get a second cut put on the valves to loose that second contact point?
Like maybe a few degrees over 45 at the second contact point :nenau Reason being I really don't fancy another wallet emptying session getting new valve seat done too :surrender
What say you experts

 

[luke1987]

Looks good to me that mate nice contact point all the way round the valve and seat. Dont worry about that extra contact point. If you add an extra angle to the valve the seat must be cut to match hence 3 angle valve seats.

 

[macabethiel]

Head build stalled

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BUT, here's where things stalled again. I lapped away expecting an easy session but keep getting double seat points So my thinking is the valve seat is a bit goosed too ?

I would be happy with those seats is that an Aldi set of measuring calipers they are brilliant !

 

[makeitfit]

Well I kind of got carried away. I now have three angle valves and seats :naughty
Details later