docmirror

Yup. Sitting in my driveway on the trailer I can futz with it for a while, then go inside watch some ball, take a swim, couple a beers, have a nap then a massive dump and go back out and turn another wrench. So far so good.

The Fixer

I hope you're washing your hands after all that^

It's easy to become a member last time i checked.

PLEASE PICS !

Bilal928S4

Doc,
Your avatar still states you are a member not a user??

docmirror

Unpaid. I will happily be a member if there is a collection from the group for my dues. I was a member for a while, but the thought of paying someone to publish my opinions, pics, etc is something I just don't countenance. But - that's just me.

The 928 group and other tech groups on this forum have been good to me. Helped out a number of times. I consider paying my 'dues' by helping others along the way.

Imo000

It's not just you, I feel the same way too and there are many others that do as well.

69gaugeman

I'm one of them.

BPG_Austin

Doc, I was about 3 cars back on the track when I drove by your GT sitting on the side of the corner.. 7 years ago already? Geez... Time flies. Good to see you're getting back to work on the car. Looking forward to watching your progress.
Ben

docmirror

Yeah, it seems like just a year or two but it was 07. I was having a really Good Day right up to that point, passed a lot of metal and I had that turbo run down. I was just going to let my brakes cool a bit after feeling some fade on the entry to turn 1, and then attack! The car had other ideas...

docmirror

well, I thought I would get this thread caught up. My first idea was to swap out a known good engine for the one in my car with oil pressure problems. With the help of Sean, we sort of pinned down the issue. I was getting good pressure in the lower galleries but the right head didn't seem to get oil after a few minutes of running. Since we didn't want to go further without checking it out, I let it sit until I could get the cam cover off.

I had a problem with the other head oil pressure relief valve being lose, and I was concerned that this side had the same problem. Well, we were proved right today, when I got the cam cover off on the right, and the pressure relief parts are sitting in the back of the well of the head. The retention screw from the side is not in, and there was no oil pressure getting up to the right side. I'm going to put the relief valve back in, and then spin the engine with the plugs out for a while to pump up some pressure.

Thankfully, we barely ran the engine before discovering the problem. All the journals look very good, and I had lots of lube on the cam lobes so no damage there either. Two steps forward, one step back. Maybe Sean will post the pic of what I found when I opened it up.

BC

Photo bucket . com

Free image hosting. Been around for a while.

Just copy [img] links from there and post here. Done.

SeanR

Yea, why we didn't look at this years ago is beyond me. It's what caused the initial issues back 7 years ago but on the other head.

docmirror

Anger, frustration, kids, beer, strife in the ME, locusts, planes, 968, Ferrari, etc.

Life just gets in the way. The one thing I'm particularly happy about is that I didn't pony up and buy the other GT engine before checking this. I do recall sticking my little finger down in the back of the cover and checking for that allen screw to see if it was the right depth but I can't recall what my findings were. I think I found the little screw in there, but couldn't decide if it was seated enough or not.

What I can recall is that after I found the first one, I called the head rebuilder and shouted at him a bit because he left it lose and broke my cam, but when I asked him about the other side he seemed sure it was ME that took them out and installed them and I am sure it wasn't. I wanted a turn key head job that was ready to install and showed him the invoice for cleaning the oil passages as well as the water jacket, and valve machining plus some new exh valves and of course seals. After that he kind of grumbled and said 'the warrantee covers your machining, and not the oil leaking, that is your problem'. He wouldn't take my calls after that. Inspecting the actual valve work, it looks great, but the oil retention plugs he clearly had never seen before cause he screwed up both sides.

docmirror

Upon reflection, and in retrospect - I will sorely admit that in this case, I would have been well served having the heads and block assembly done by one of the 928 specialists. I made a mistake on one bearing shell set which is on me, and the two faults in the head assembly are also on me in the final examination, although I didn't commit the sin, I should have inspected the work better.

The rest of the rebuild is straightforward, and was done with care, but in the case of the bearing reversal I have no excuse. Just a simple mistake. Lucky it didn't lead to infant mortality of the entire engine and John caught it in time. The engine will run again.

Now, what is the consensus on lubing and filling the lifters while the cover is off? This would entail a fair amount of hours as I would have to remove the cams and chains and re-time the valve train again. I wonder how long it will take to fill the lifters once engine oil is supplied? I've used some assembly lube on the cam lobes, and I'll have more oil in there when I close up, but it'll be a minute or so until the pressure displaces the air in the oiling circuit.

SeanR

No matter, now we just get the ball out, put it all back together correctly and you can go drive.

69gaugeman

No need to fill the lifters. It is a short amount of time before the oil galleries fill them. They do no engine damage while they are collapsed. If you are really worried about it pull the fuel pump relay and run the starter in 10 second bursts to get the oil pressure up.