engine change PLEASE HELP

[Techmonkey]

this i what happened my 83 944 started making a clanging noise so I drove it immideatly to my mechanics it seized up when they started it to pull it on a lift. What happened was I spun a bearing and ate up the cam shaft and wasnt sure if it could be milled.
Anyway I bought a 87 engine and the DME that was with it.
Finally to the question: What can I use from the old engine and what parts will I need to get?

Please help



Soooo Glad I found this site.

[Wolf1]

How complete is your new engine? You should have everything you need between the two engines. Dont forget, new belts and rollers while you are at it. If reusing your old oil cooler, be sure to flush or better yet replace it to prevent destroying the new motor with old bearing material from the spun bearing. WOW.....another Idaho Porsche guy....what are the chances!!!

[Techmonkey]

was planning on belts and rollers will get oil cooler probably
Thanks


Saw your 72 914 in the paper

[AFJuvat]

Welcome to the group.

As stated, you should have everything you need between the two engines.

If you are doing a full on engine swap, you will have some wiring considerations as the 83 and 87 had a different DME and wiring harness.

If you use anything from your old engine, it will have to be cleaned completely due to bearing contamination.

AFJuvat

[SoCal Driver]

Put the 87 engine in the 83 using the 83's DME, AFS and harness.

Use the 83's alternator and A/C bracket and all.

Change the poly rib pully on the front of the crank to the 83's. You have to remove the V-belt power steering pulley anyway.

Torq the big center bolt on the front of the crank to 150 foot pounds. You will need a flywheel lock or two really big screw drivers like I used.

The temp sender for the dash gauge on the later model engines has two connetions. One will run the gauge in the dash the other is for a warning light. You may have to put a smaller electrical slip on connector on the single wire. A good idea anyway as these corrode.

Use the intake and injectors and fuel rail from the 83.

Use the cast iron exhaust manifold from the 83.

Use the speed and reference sensors bracket and all from the 83.

NOTE: Be sure to remove these first before extracting the engine. Some also take off the oil pressure sending unit as this hangs up too.

[Techmonkey]

Thanks for th welcome.

so the 83 DME is the way to go NOT useing the new DME from the 87

The old enigine is already on a stand because we had to pull to get the cam shaft out

The DME A/C compressor, alternator & exhaust manifold are the things removed from the 87 engine

[Wolf1]

Originally posted by Techmonkey


Saw your 72 914 in the paper

Nope that wasn't mine. I sold mine online to an attorney in Chicago.

I've noticed a few teeners in the paper around here lately though. Where are you located in Idaho? Must not be too far away if we are lookin at the same paper!!!!

[Techmonkey]

I'm in pocatello

[Wolf1]

Ahh, just down the road a few miles. My 931 came out of Poky.

[Techmonkey]

do you do all your work your self or do you have a mechanic if so who?

[Wolf1]

I do all work myself. I work at an independant repair shop, however none of our customers drive Porsche's. So my only Porsche experience is on my own cars.

[SoCal Driver]

Originally posted by Techmonkey
Thanks for th welcome.

so the 83 DME is the way to go NOT useing the new DME from the 87

The old enigine is already on a stand because we had to pull to get the cam shaft out

The DME A/C compressor, alternator & exhaust manifold are the things removed from the 87 engine

The "brains" changed at the 85.5 model change over. This is where the dash went from the square to the elongated oval.

strip down the 87 engine and use the 83's intake and fuel rail, exhaust, alternator, A/C and bracket, AFS. Change the pulleys on the crank making darn sure the bolt is torq'd to 150 foot pounds.

You can use the 87's gauge temp sender as well as the oil pressure sender. Make sure the wires are correct on the oil pressure sender or the pressure gauge will stay at 5 as soon as you turn the key on.


NOTE: The oil filler is different between these engines. The 87 has a larger port on the bottom than the 83 so you will need the one off of the 87.

After you get the 97 engine in take out the spark plugs, disconnect the two wires to the coil and pull the plugs on the injectors and crank the engine over till you see some oil pressure. I've had to change the oil filters on a couple of engines that had sat for a while to get oil pressure.

[Techmonkey]

execllent I know I would have run into problems unless I got so help and this is exactly what I needed.


should I just put a new filter on from the start then crank until I get pressure

I take it youve done this before SoCal Driver. Thank you.
Anything else you think I will need to know would be very helpful.

The engine should be comming in monday.