A heavy oil used in compression-ignition engines.

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6
votes
2answers
5k views

Why do head gaskets fail in diesel engines?

I'm considering the purchase of a 2001 VW Golf TDI "mechanic's special", so named because it apparently has a failed head gasket (white smoke). I'm not a mechanic but I'm fairly handy with tools and ...
1
vote
1answer
719 views

Diesel motor running slightly jerky on normal RPM after having the turbo repaired

I got my turbo repaired, the service told me that stopped working due to a sensor that had to be changed. It costed me a lot because they told me that the sensor was inside the turbo and it was hard ...
1
vote
4answers
12k views

What is causing air in my fuel line?

I have a 2003 Jetta TDI. I drove it last night with no problem. This morning I cannot start the car. I popped the hood, and discovered air in the fuel line between the fuel filter and injection ...
2
votes
1answer
310 views

1999 diesel Ford fiesta not starting

I'm having trouble starting a 1999 ford-fiesta, diesel (EN engine), that would be mk4 of fiesta. What I tried (in that order) was: Changed fuel filter Tried starting spray (the engine seems to have ...
2
votes
5answers
970 views

How can I increase the life of my diesel engine when my car does lots of small trips?

What things can I do to increase the life of my diesel engine when I make lots of short trips in the car? My daily routine means that the trip to work goes via another destination which gives my ...
2
votes
0answers
487 views

High oil pressure in a marine engine

High oil pressure in my marine Perkins 4108 diesel showing 80 on the gauge, oil and filters recently changed, wiring checked and ok it runs an alternator to charge the batteries and when disconnected ...
39
votes
8answers
5k views

What to check when buying a used car?

I'm looking to buy a used car. What do you think I should check (mechanically) before buying it (especially if it's diesel)?
4
votes
1answer
473 views

Biodiesel and DPF (Diesel Particulate Filter)

I read a little about DPFs and biodiesel. Some claim that there's a reduction in lubricity and/or viscosity of engine oil when using B30 or above. They warn about increased engine wear because of it. ...
-2
votes
1answer
285 views

Diesel engines maintenance [closed]

Diesel engines are more complex than their petrol counterparts. What are the basic diesel engines maintenance must-dos?
2
votes
2answers
13k views

How to extend the life of the dual mass flywheel in a diesel engine?

I am looking for ways to improve the life of the dual mass flywheel (DMF) in my 2005 Ford Focus tdci. I have heard that they can wear out quite quickly on the Ford Focus if they are driven in city ...
3
votes
1answer
1k views

Is it possible to use biodiesel in a BMW 335d if I remove the DPF and remap the ECU?

The new (2009-current) BMW 335d sells in the U.S. with a DPF to reduce emissions, but which prevents the use of biodiesel. I've read about people removing the DPF and re-mapping their ECU to get ...
11
votes
9answers
10k views

Diesel vs Petrol motorcars. Pro's and cons?

I realize this may be a silly question to those of you on here who are proper petrol-heads and this may even be a repeat question, but I could not find anything on it on here, so here goes: What are ...
5
votes
3answers
1k views

What kind of engine oil to run a Diesel?

I got an 1987 Toyota Land Cruiser with a 2H diesel engine. I never changed oil on a diesel engine prior to this truck, so I'm a little confused. Toyota Factory Shop Manual recommend API CC oil type, ...
3
votes
2answers
1k views

Marine Diesel fuel filter vacuum gauge spiked — filters are new

I've got an 80-HP marine diesel engine (in a sailboat, naturally). I've got a the Parker/Racor 75500MAX dual fuel filter system with an attached vacuum gauge to monitor resistance. For the first few ...
5
votes
2answers
503 views

What does this device on a 1985 Mercury Lynx/Ford Export Diesel do?

I have a 1985 Mercury Lynx (Ford Escort) Diesel 4 cylinder. The device shown in the pictures -- below the starter -- has a hose connecting it to the radiator. There is another hose that is ...
2
votes
1answer
2k views

High oil pressure after oil and filter change

I recently changed the engine oil and filter in my Westerbeke diesel. I gave it the usual (and specified) 4.5 quarts of SAE 30, specifically Chevron DELO. Now when it starts up it reads 80 psi of ...
8
votes
2answers
24k views

How to test for defective glow plugs?

On a diesel engine, how can I know which glow plugs are defective, and can I change these only?