does the set up still use the taper lock balancer location and the splined oil pump drive?which tends to frett into the shoulder allowing the balancer to come loose
haven't been here for a while but I can tell you how we used to repair this problem.
firstly as stated prev the key is only there to postion the pulley, pulley should be a transition fit and torqued, the best way to go now is to replace the crank as to repair it properly will require removal...
I am no expert but was once told by someone who thought he was that engines rely on the thermostats to regulate water flow so that there is no fluctuations in temperature and water is kept in the radiator long enough to be cooled to the desired temp.Also they keep a supply to high areas of the...
This sounds like a set up problem with either the tunnel bore or the boring.
You said there were saddles fitted which I'm presuming by 351! is reducing from 3" to 2.750" mains and new caps fitted this would require a line bore/hone and if not set parallel to deck heights could cause your error...
I agree with btrueblood on machining after anodizing due to uneven coating we anodize pins for mining applications and grind to bottom tolerance or lower to allow for specified thickness.
I used to reclaim cranks using hardchrome and would build up to .010" o/size and grind back to finish size...
Thanks for the info again arunmrao and taking the time to reply. The people on this site are always a great help I only wish I could return some, I'll write all this down and when the technician comes in again I'll ask him a few questions and see if it all adds up, in the mean time will check...
I had a look at the machine today their is no manufacturer id and the heat settings, frequencies etc are programmed through a computer by the technician who set it up,There are 2 gauges one for power input% and the other for volts and kilowatts, we set up following written instructions but have...
Thanks again arunmrao
I searched google last night which was a lot easier once you put me on the right track and found some good info,tho I don't know the machine's outputs etc.
Will give the boss Inductotherm info and he can take it from there they have an associate company in Australia...
Thanks arunmrao I read redpickers reply to a previous post on rehardening a spline which made me realise we were getting different results from the 2 machines.Now we have to work out whether we change(if possible) the larger computurised machine to low frequency or increase the size capacity of...
Hello all I am trying to find out the best method for induction hardening 4140.
The material is thru hardened 30hrc of 76mm to 100plus diam.Required surface hardness is 52to 55hrc to a depth of 7mm/14mm diam.
We have 2 induction hardeners 1 is a low frequency up to 100mm diam and the second...
5secondracing is right about the stress relieving.
I am currently grinding an RB26 Nissan crank which is to be nitrided.The heat treatment company uses cryo to stress relieve some shafts before normal stress relieving as it reduces the amount of distortion when the shaft is heat stress...
Thanks to all for some good info.The crank was my main issue but I got much more advice than I bargained for and is much appreciated.Keep up the good work.
I was asked the question about the viability of a 2litre ford engine if turbo'd for a rally car.I have my doubts with the crank and was wondering if anyone has modified these engines previously and what problems they encountered.
You have to be careful with these engines they have a bad problem with picking up big end bearings in particular No4,but I have seen cranks with numerous failures.
Once heated the pin loses its hardness (it should be 55hrc)and most times develope a heat crack across the underside(main side)of...
G'Day PackardV8.
Thanks for the reply it sounds like you are having the same probs as we have with the cheap imports.A lot of wreckers began importing Jap motors years ago and really knocked the guts out of the reco industry and the government did nothing to help except reap in all their...
