RD 28 top end strip

[solarman216]

Small update I filled all the ports with kerro to the top and 6 hours later no leakage at all, so will check the one valve stem seal that I removed the valve from, if still soft then valve will go back in, if hard then I will replace them all, Rick

 

[solarman216]

Valve stem seal still soft so valve back in, this is the Ali stud I made and fitted it with studlock so hopefully when I cut the top off, drill and tap the original position it will not turn, the stock I used started life as a door handle

 

[solarman216]

All the followers cleaned and re assembled with new oil, you can see the indentations made in the wood blocks as well as the Ali one which proved most successful, Rick

 

[solarman216]

Ali filler stud cut and filler plug ready to drive in to enable central drilling of the original stud hole

 

[solarman216]

Drilled, threaded and stud fitted to original position

 

[solarman216]

Had to shoot off to Eastbourne to collect my refurbished turbo, Rick

 

[Flying Torquewrench]

Looks good Rick!

You have done an excellent job so far.

 

[Flying Torquewrench]

Rick, how are you getting on?

That turbo looks very good btw.

 

[solarman216]

Been a bit slow, frost has not left the ground here all day, head back on turbo loosely fitted exhaust manifold on and inlet part fitted but such fiddly bolts and my hands just do not function like they used too, like to get it done by Sunday afternoon but somehow doubt it, got to check the oil pressure relief valve but discovered that the oil pump will not come off without dropping the sump, ho hum it gets done when it gets done, customers screaming but they will just have to wait, Rick

 

[Flying Torquewrench]

Cheers Rick! Thats fair enough, it has been cold up here the last few days too.

With the snow forecast we had I haven’t dared starting the job as the Patrol is our only way out. Had about an inch of snow overnight which was no issue for the Patrol. One of our neighbours has a BMW and he cleared 1/2 mile of road as he wouldn’t get to the main road. The joy’s of living in a rural location at the bottom of a valley.

 

[solarman216]

Only managed to put the cam belt on today, as the minus 3 last night froze our water supply and took best part of the day sorting it out, Rick

 

[solarman216]

Well a very disappointing day, got it all back together about 1.30 and the moment I turned the key, my heart sank, it spun over like a petrol engine with no spark plugs, it did start OK but road test says it is the same as before I stripped it, a mate suggested the valve springs are weak, I can only comment as said in an earlier post that my springs measured 10mm longer than stated in the manual and I put this down to the lack of "rotators" at the bottom, I just have two plain washers, on for the inner spring and one for the outer, I have no dimensions for the rotator but comparison on the drawing I would say they are about 10mm thick, at least I only have to pull the camshaft now to gain access to the followers and springs, checking out springs now as I know there are two lengths so need to get the correct ones but would not mind betting only one size is listed, the only good news is the turbo hits 6 psi stationary, Rick

 

[solarman216]

HELP

Cannot find RD 28t valve springs anywhere?????? Rick

 

[elty001]

Cannot find RD 28t valve springs anywhere?????? Rick

Wish i could help mate.
Maybe Banshee's contact at Japanese 4x4 spares can help??

 

[solarman216]

OK guys and girls, I need to work out a way of measuring 68Kg of downward force onto my cam followers as that is the pressure required to compress the springs to 25mm, if they fail then I have to get new springs, which in the scenario so far established seems to be the root cause, as cannot fault the cam followers, Rick

 

[solarman216]

Another thought, can I be experiencing abnormally high oil pressure to the head, causing the followers to be over pressure and therefore holding the valves open, how can this be checked? I am at my whit's end on this one, it just does not make sense, Rick

 

[Banshee]

I don't have much faith in these 2.8's

That's 3 poorly one's I know of now!!!

 

[solarman216]

This is where I am at currently, having looked at the oil diagrams there is no pressure check valve for the head supply and the book says 60 odd psi at 3k revs is good, so discount that, SPRINGS well apart form the fact they are not available I cannot accept that all 12 are going to go weak at the same time, so this W/E I will be having the cam shaft off and modifying the cam followers so that they can bypass oil far quicker, if that fails (excessively noisy tappets) then I will get a complete set of followers, if that fails I will convert them at no cost to fixed followers making my own shims, I will win, no question, Rick

 

[Barrbeast]

Rick, have you tried any of the Aussie Trol forums like patrol4x4 https://www.patrol4x4.com/forums/ or nissanpatrol.au http://www.nissanpatrol.com.au/forums/forum.php

They should know the Y60/GQ 2.8 inside out and I'm sure could assist.

 

[elty001]

Rick, have you tried any of the Aussie Trol forums like patrol4x4 https://www.patrol4x4.com/forums/ or nissanpatrol.au http://www.nissanpatrol.com.au/forums/forum.php

They should know the Y60/GQ 2.8 inside out and I'm sure could assist.

Good shout Rob:thumb2
The Aussies love their patrols.