Welcome to the homepage of 951 Werks! :-) This site was created in July 2023 as a repository for useful information when owning and working on a Porsche 944 turbo.
The 951 community is already rich with information, but I found that some info that circulates is incomplete, rather incomprehensive, and sometimes wrong.
Even the well-known websites (you know which one I mean in particular) have some errors which make working on the 951 more difficult than it needs to be.

Because it is impossible to edit other people's websites, and I don't want to bury the information on one of the many 951 forums, I started this website. I do not intend to make this the only 951 website you should have bookmarked, but rather envision it as an addendum to the many terrific websites there already are on our cars.

I hope to share some knowledge and tips hard-earned during my hours wrenching on my 944 turbo. And I hope you'll find it useful.

This is the history of my car.

My car is a very lightly optioned car which has its obvious drawbacks. On the other hand, this means there is also less stuff that can break or rust. It luckily does have airconditioning, which is a big plus in my book.

Color LM3Y/LM3Y: garnet rot metallic

Interior: burgundy leather

Options:

139: seat heating, left

298: prepared for unleaded fuel (catalyst, fuel filler neck), manual transmission car

418: side protection mouldings

423: holder for cassettes and coins

573: air conditioner

This is where I'll post the weird, funny or frustrating relics of the previous owner.

Bolt and nut missing from exhaust

Dust cover cap missing from behind ignition cap

Right heat shield missing that protects motor mount from exhaust heat

Bad welding on exhaust headers

Bad welding on exhaust pipe

Timing belt and rollers

Water pump

The cap of a brake fluid reservoir was wedged in between the heater core unit.

One of the windshield wiper valves was wrapped in wrapping film.

This is where I will post all breakdowns of my 944 turbo. This list only includes breakdowns that happen during actual drives or test drives. For an exhaustive list of broken stuff, see the work done page.

April 24, 2024:

After a 5 km drive to the fuel station where I went to air my tyres, I noticed smoke coming from under the hood. A coolant line had ruptured and was spewing coolant all over the place. I parked the car, and went to the local DIY store to get duct tape, a funnel and 5L of demineralised water to refill the system. In the end, I used the coolant I still had in the car. The duct tape didn't hold up, but after a mid journey stop to refill the reservoir again with the last of my coolant, I made it back home.

A quick second stop to add a bit more coolant.

This is where I will post all the work that has been done to my 951.

April 2024:

Completely refurbished windshield washer system (pump, connectors, hoses, valves)
Installed another new fuel rail (sheared off the cap nut connection)
Received national plates to go to DMV
Replaced 2 rubber coolant lines (94457258900 & 94410624103) + coolant refill and venting
Passed MOT inspection (29/04/2024)

March 2024:

Replaced heater clip (94457231400 + 94457221700) under dashboard (always hot air problem)
Removed wheel spacers (not allowed by MOT) + changed to open lug nuts to accommodate removal of spacers
Replaced broken hood strut mount (driver's side) with M6 ball stud + washers + lock nut, touched up mounting bracket with paint
Replaced both hood struts
Replaced oil cap seal (99970184640)
Conducted leak detection test with smoke (found 1 leak: busted turbo to intercooler hard pipe)
Fixed non-latching hood
Checked Fuel Quality Switch position in DME (Pos = 0)
Replaced turbo to intercooler hard pipe (95111031003)
Replaced rubber boot for turbo to intercooler hard pipe (95111037101)
Flushed windshield wiper fluid reservoir

January 2024:

Exhaust manifold replacement (including nuts, studs, gaskets)
Coolant hard pipe above exhaust manifold (94410624303)

December 2023:

Exhaust manifold heat shield replacement (95110705301)

November 2023:

Oil change + oil filter + drain plug
Replaced broken coolant venting screw + washer
Coolant top off + venting
New fuel rail + injector seals
Installed missing heat shield 95134110802
Moved the car to its (rented) home, closer to where I live

October 2023:

Crossover pipe for the second time (new old stock)
New Mass Airflow Meter
Restoration of original air filter box
New coolant reservoir + refill
New battery cut off
Injector seals
Intake header gaskets

September 2023:

New battery

August 2023:

Crossover pipe (welded pipe) + Lindsey's Racing copper crossover gaskets
Engine bay light bulb
Coolant refill
Fuel hoses (all 3 on fuel rail)
Injector seals
Fuel rail bolt (was missing)
Intake header gaskets
Lambda sensor

May 2023:

Timing belt + idlers/pulleys
Water pump + thermostats
Balance shaft belt
Balance shaft pulley
Balance shaft front seals
Airco/powersteering belt
Alternator belt
Front engine seal
Camshaft seal front & back
Distributor rotator
Coolant refresh
4 new tyres
FAILED MOT: CO emissions too high + wheel spacers (illegal) + windshield wiper spray didn't work

November 2022

Car bought :-)

Perform fuel pressure test: need to buy correct adapter

Replace fuel filter and fuel lines attached to it: PARTS READY FOR INSTALLATION

Fix fuel level gauge (incorrect level displayed): IDENTIFYING PROBLEM

Replace camshaft cover bolt: waiting for replacement bolt

Install new radio: BLAUPUNKT Bremen SQR 46 READY FOR INSTALLATION

Repair dashboard clock: PARTS READY FOR INSTALLATION

Replace battery cut off: IDENTIFYING SUITABLE REPLACEMENT

Replace possibly leaking cam tower gasket: VERIFYING PROBLEM

Helicoil fuel rail bolts: need training to be able to perform this job

Fix damaged powersteering reservoir hose (94434744505): WAITING TO ORDER PART

Full exhaust system: "5 year project"

Tial wastegate + boost controller: "5 year project"

Momo Prototipo steering wheel: "5 year project"

Motor mounts (seemingly 2 different types intalled): "5 year project"

Silver 'turbo' insignia (black one installed)

Front bumper respray (bad partial respray done): "10 year project"

Coolant: Bardahl Pink Type D -25 degree C G12 G12+

Oil: CASTROL GTX Ultraclean A3/B4 10W40

Tyres: in the front Nexen 205/55 ZR16 94W N'Fera Primus XL & in the rear, Nexen 225/50 ZR16 96W N'Fera Primus XL

Battery: Varta Blue E43 72ah 680A

Fuel filter: Mahle KL 21

99918172240: washer pump lines

477955455: washer reservoir cap

91162874900: filter washer reservoir

Technical articles

Here you will find an overview of technical procedures that I have carried out myself. These are guidelines and walkthroughs, filled with tips you may not find on the well-known websites such as Clarks or Pelican Parts.

• Air filter box installation
• Crossover Pipe Exhaust
• Exhaust manifold replacement
• Exhaust manifold heatshield replacement
• Hood strut mount repair

Here you will find links to the websites I have used most during the restoration and ownership of my 951. Their inclusion on this website is a token of approval, or at least of my personal assessment that I could recommend them and their services to others. I do not stand to gain anything from their inclusion.

Technical procedures

• Clarks Garage
• Pelican Parts 951 technical articles
• Partworks Torque Specs

International forums

• Carpokes: a very friendly forum for Porsche enthusiasts
• Rennlist: the biggest Porsche forum there is
• Pelican Parts 951 forum: a smaller but also very helpful forum dedicated to Porsche (and other brands)

Handy tools and information

• Renntech VIN Decoder
• Carpokes' 3D printed timing belt tensioning tool

944 option codes

• Stuttcars 944 (1986) option codes
• Stuttcars 944 (1987) option codes
• Stuttcars 944 (1988) option codes
• Stuttcars 944 (1989) option codes
• Stuttcars 944 (1990) option codes
• Stuttcars 944 (1991) option codes

Vendors I used

• 9xxTeile: local Belgian shop that is willing to order the little parts at Porsche, free pick up possible, good service!
• RosePassion: the well-known French Porsche superstore that has almost everything. Sometimes a bit expensive though, but good delivery times (unfortunately not free).
• Rennbay: great little USA shop, willing to work to lower custom charges. Good fuel line kit.
• Lindsey Racing: well known USA performance shop. Has interesting stuff, especially Xover pipe gaskets.
• Europa Parts: mixed reviews on the internet, but were very prompt in answering mails. Especially fast delivery: only 4 days from USA to Belgium. Had a killer deal on a brand new OEM air flow meter!
• Pelican Parts: well-known USA super store with a large selection. Clear shipping prices to EU and also sells Rennbay items.

Second-hand parts vendors

• Exclusive Classics: Dutch parts store that used to specialise in 944 but went with more modern Porsches as that's where the money is. Still has a lot of 944 parts, bought a Xover pipe there. Nice guy.
• 944parts: Small scale Dutch parts store. Friendly and knowledgeable guy, sold me a nice pair of exhaust headers for cheap.