"what is the direction of valve rotation supposed to affect?"
My opinion is nothing, It's just incedental.
Is it a good thing that the valve to seat contact differs all the time? Maybe for equal wear or seal?
Kind of begs the question, what would happen if we fitted square or oval section...
C'mon guys, tell me I've stumbled on something pretty new!
http://s103.photobucket.com/albums/m127/Deltona_II/miscellaneous/?action=view¤t=P1000153.jpg
Pros and cons?
Dunno myself having only taken the pic today and not had time to think about it, but I wonder what the spool up time...
Hello Desertfox,
I used an off-the-shelf thread insert - or two anyhow, one on top of the other to get the correct length.
Someone brought in an 'Emergency job' a few weeks back of a similar kind (different circumstances and engine) and I bored it out oversize, made up an insert from an M14...
Hi Desertfox,
I've never had this happen before and neither has another specialist I spoke to, I think unless we got the actual bolts tested we will never know, the fault definately lies with either a previous mechanic or the bolts. I think they must have been tightened (or over tightened) too...
Hi Desertfox,
Sorry for slow reply, Christmas and all that got in the way.....
Total bolt length to underside of (bolt) head is 173mm.
On a similar note:
I don't think a torque plate is totally necessary when boring and honing these cast iron 4 cyl blocks as they are very rigid, but I like...
Ah, I see. It seems the extra two 90' turns give (practically speaking and not theoretical) an approximate increase of 25 - 30Nm, let me explain:
Set the tool to 20Nm, tighten bolt. Set to 40Nm, tighten bolt. Set tool to 90' (or use a 90' angle indicator, set square etc) and turn bolt through...
It is the very same wrench Terry, I'm finding that it doesn't allow for the play in the socket fittings or the spring in itself or the bolt.
Now looking at that statement I just made you got me thinking and I'm going to invest in a new 'socket' (I put that in inverted commas because it is a Ribe...
Guys, what are your thoughts on these?
After years of using the 'click' type I recently got one and didn't really get on with it, it wasn't cheap at around $450 and I had hoped for more.
When using the tool it vibrated and beeped at 1Nm less than what was on the display so I set it higher...
Hi Desertfox,
I don't think there is much to be gleaned from any info I can get on these bolts but:
M10 x 1.25.
Length of thread in contact with block: 20mm.
No markings on them whatsoever.
Torque figure is difficult to define, but sequence is: 20Nm, then 40Nm, 90 degrees, 90 degrees. This...
Hi Desertfox,
Thanks for persisting, I fitted some new standard bolts today and they all held fine. They were the same length as the others.
It would be interesting to know why what has happened did, but without extensive testing which I have no funds or time for we can only guess.
With no real...
Hi DF,
I'm afraid I don't know much about the spec of the bolts (beyond what I can see and measure of course). I just assumed they were standard, mainly because they look it and have the 'Ribe' fitting on the head.
I have ordered some standard bolts which will come tomorrow, at least then I...
Thanks for your pointers Rod/Franz and yep, the 124 does have the Lampredi Twincam too, just an earlier version. The ones I work on are the later turbo 16v type with twin balancer shafts which were used in the integrales and Fiat Coupe (16vt).
You are also correct in that I am trying to sort out...
Hello all,
I recently got a car with a four cylinder turbo Lampredi Twincam in the workshop with a recent rebuild from some 'expert' engine builder. The engine started to knock whilst in my care so I stripped it to find it failed on worn out crank bearings (mains and big end), scuffed bores and...
