Engine Drop

[Discseven]

Am dropping 1985 Carrera engine to replace a number of parts for general maintenance. I’ll list these parts below.

If you have any suggestions as to what I should look at and what I should do while the engine is out, I’d welcome your input.

I was going to replace all the oil seals but have grown fond of adding 2-3 quarts monthly and changing the filter every other month. No leaks are over the manifolds. I drive under 1,000 miles per month. I'm planning to dump the sump and tank once a year. I've been checking the oil consistently, placing a few hot drops from the stick on a sheet of brilliant white, glossy paper. It's very clean. (Cannot say the same for garage floor.)

Replacing:

• Front crank seal (was told that oil leaking here may interfere with the flywheel sensors)
• Guide rails
• (Check chains – possible replacement)
• Trans oil - synthetic
• (Check clutch pad – possible replacement)
• CVs, boots & gaskets (not the shafts)
• Fan housing (alternator mount has begun to crack – fan rubs housing on occasion on starts)
• Fan (blistering crack is growing near inside edge of fan where fan meets center hub - photos below)
• Fuel pump
• Fuel pump relay
• Fuel filter
• Fuel pressure regulator
• Ox sensor
• Oil warn switch
• Oil pressure sender
• Spark plugs
• Air filter
• Oil
• Oil filter
• Belts (Fan & AC)

Notes:
Engine has turbo valve covers and collapsible return tubes.
Valve clearance was set a few months ago.
Flywheel sensor, cylinder head temp sensor, starter, distrib cap & rotor, ignition wires were recently replaced.

Blistering/cracking fan:

[will hung]

You have a pretty good list. I say replace the internal oil thermostat while you have the engine out too. Mine was stuck open.

[GaryR]

Rear main seal, any external seals and gaskets that are hard/impossible to get to with the engine in..

[kodioneill]

How many miles on the engine? If over 100,000 check for head stud (lower) breakage and possible valve guides and valve grind.

[Discseven]

Thanks guys ~

Engine has 230,000 miles.

[zippy_gg]

I am going through a similar maintenance and would suggest the following:

• Check/replace S hose out of oil tank
• Check/replace heater hoses
• Check/replace clutch cable
• Check/replace starter
• Check/replace fuel lines in engine bay
• Check/replace engine and transmission mounts
• Check/replace crankcase breather hose and replace gasket
• Replace oil cooler thermostat o-ring
• Replace Oil cooler seals (3)
• Replace rocker arm seal
• Check/replace distributor o-ring
• Check/replace main shaft seal underneath crankshaft pulley (as already mentioned)?

[GaryR]

2-3 qts for each 1000 miles, 230K on a 3.2, your valve guides are most likely toast. You should plan on a top end rebuild at the least.

[DRACO A5OG]

Synthetic Gear Lube? Are you sure?

[86 911 Targa]

Replace the vacuum, and fuel lines:



Good luck,

Gerry

[GaryR]

Originally Posted by DRACO A5OG

Synthetic Gear Lube? Are you sure?

Positive, nothing is better in the 901.6

[RWebb]

my suggestion is to do a search on engine drop and you will find many ideas

a 1985 trans. will be a 915 - so do NOT put a synthetic gear oil in it; use Swepco

I dunno how the above opinion was arrived at but it conflicts with everything else

[GaryR]

Relax RW, I was just playing off Draco's out-of-nowhere comment.. no such thing as a "901.6" as far as I know!
And I say use Kendall in a 915!

[Discseven]

A mechanic (Richard Danvers) that used to work on the car put the synthetic in when I first got the engine at 62,000 miles. (It's in a 1980 Targa. At the time I had the option to rebuild my existing '80 engine or get the 85 Carerra -- I chose the latter.)

I wast told that once synthetic has been run in a trans, it's not good to put fossil oil in afterwards --- stay with synthetic.

[midnight911]

Originally Posted by Discseven

A mechanic (Richard Danvers) that used to work on the car put the synthetic in when I first got the engine at 62,000 miles. (It's in a 1980 Targa. At the time I had the option to rebuild my existing '80 engine or get the 85 Carerra -- I chose the latter.)

I wast told that once synthetic has been run in a trans, it's not good to put fossil oil in afterwards --- stay with synthetic.

^this is very exciting!!!

[GaryR]

Originally Posted by Discseven

I wast told that once synthetic has been run in a trans, it's not good to put fossil oil in afterwards --- stay with synthetic.

902's will immediately eject all the dino oil onto the ground if they are used to synthetic!

[DRACO A5OG]

Either way change the gear lube after 1000 miles to get most of the synthetic out.