911 T 2.2 rebuild - 1971

[ErrieKruger]

If the cam tower mating surface is off by 0.2mm on # 2 , and it is machined by removing +/- 0.1 mm from the # 1 and # 3 surfaces , what other effects can this cause?

Why and how would cam towers that are torqued down deform ?

I decided to order another ( machined and inspected ) cam tower , to make sure I sleep at night .

This will give me time to reflect on every step taken so far , and mentally motivate me to start taking things apart again.

One small step for man , one giant slip for Errie Kruger.

[ErrieKruger]

I also gave in to threats and pleas from Sue about moving my MOTOR out of the living room - tomorrow we will be married for 32 years.

This looks better. I got away on a technical point.

[ErrieKruger]

Cleaning up the living room was more appreciated than the leak-down tester I gave her as an anniversary present. That was until she saw the blingbling that was also in the box.

Hope to move the motor back when I receive the new cam tower

[ErrieKruger]

Replacing the cam tower might solve my problem , but not answer my questions - anybody wanting to give their 2 cents on this ?

[ajwans]

Have you measured all the cylinder heights? If your heads are not flat and
level across you have a problem somewhere. I would not entertain modifying
the cam tower as a valid solution to this problem. Not that it wouldn't work,
you're just solving the wrong problem. What is it that is making one of your
heads sit up a little?

andy

[ErrieKruger]

Andy - looking at all the options and potential causes .

Heads and case machined by Ollie's - trust them to be perfect.

Prof Ferdinand must be looking down on me with a smile.

[356RS]

Andy and I have both mentioned checking the cylinder heights. They must all be the same height. Cam tower could be warped some how, I have seen this before but not very often. Trying to re-machine the cam tower to correct the problem with # 2 is not the answer IMHO. If case and heads were done at Ollie's they should be fine, but you should still check and make sure.

[ErrieKruger]

Thanks guys - cylinder heights will be measured and feedback given. Hope to do it in the next few days.

These are new pistons and cylinders.

[350HP930]

Don't forget to measure all your shims as well.

[ErrieKruger]

Grady asked me to post pics of our trip in April. I took more than 1000 photos , but did not have internet access for 99% of the time ( cell phone reception as well ). Still got a $1321-27 bill for roaming charges.

Here is one where I introduced my grandson to a kitty that showed a bit too much interest.

[ErrieKruger]

Peak hour traffic more dangerous than the 405.

[Flieger]

That looks like fun to be around (trained) big cats like that.

[ErrieKruger]

Correction - shown here the 0.25 ( measured ) and 0.50 ( measured ) shims before removing the 0.25.




When taking the cam tower/heads off today , the thread on one stud looked different than the others ( this was on # 2 - the problem ). I will use my snap-on tool to make sure this is perfectly clean , use the washers received from Tom Butler , a new nut , and see what happens. This could have caused uneven torque.

[350HP930]

Have you been using any lube on your nuts before tightening? Dry is not the way to go and will not produce consistent torque values.

[ErrieKruger]

No luck - hoped I could get a break on this. Will do it the proper way as suggested by Pelicans.

I have used oil as lubricant , but must have used an old nut on this stud to keep the cylinder from falling when turning the motor.

With the last assembly , I did not add oil again. Will try one more time.

[ErrieKruger]

350HP930 - it works !!!!!! I hoped the whole time that this is a torque problem , and nothing more serious.

The combination of wrong washers , one dirty stud head , and not enough oil on threads was another rookie mistake.

[350HP930]

Glad I could be of help, then again I do have years of engine building under my belt and had to learn a few of these lessons the hard way myself as well, lol.

[ErrieKruger]

I have tried to be as precise as possible from the start. A repetitive action like taking the tower off at least 6 times , made me miss the basics. Yes Mr. White - you can not fix stupid.

Although the camshaft could be turned by hand , it was significantly tighter than the other side. Now they are perfect.

[ErrieKruger]

Max - this is a 6 month old cup kept in the kindergarden. The pic was taken at a research facility that does genetic testing and scientific research. There are numerous prides of lions , but because the males kill the offspring of other males , they are taken from the prides as soon as some brave or drunk ranger finds the guts.

They are then raised ( bottle fed ) till they get out of control and big enough to be released into the pride again.

There is no such a thing as a tame wild animal. Instinct will always take over at one stage. The only training these cups get , is how to be a lion that can survive in the wild. Wonderfull work by this dedicated team.

[ErrieKruger]

Did this a while ago - sandblasted , primed , and painted with high temp engine paint.