Motor Vehicle Maintenance & Repair newsletter

Top new questions this week:

Why not use gasoline on diesel engines or vice versa?

I've read gasoline engines use sparks to ignite the mixture, but diesel engines use just compression which can't be done in gasoline engines due to high compression ratios which can cause engine ...

diesel gasoline  
asked by user3407319 12 votes
answered by vini_i 10 votes

How do variable-length intake manifolds work?

I have heard many vehicle manufacturers have been using this to improve power and torque figures. They do this by altering the length of the manifold, I am hoping for better diagrammatic explanation. ...

air-intake intake-manifold  
asked by Anarach 7 votes
answered by Zaid 6 votes

Failing starter motor - why does whacking it help?

Starter motors can be notorious for intermittent cranking issues towards the end of their useful life. Why is it that some starter motors can be persuaded to crank the engine by hitting or tapping ...

starter  
asked by Zaid 5 votes
answered by Paulster2 6 votes

Removing oil stains from the driveway?

A few weeks ago, our car seems to have spilled some oil on our driveway. I regret that I didn't ask sooner but I hope it's not too late: --> What can I do to remove these stains? As for the car, I'm ...

cleaning oil-leak  
asked by Torben Gundtofte-Bruun 5 votes
answered by mikes 4 votes

Rain tyres for motorcyles

I have recently started driving a motorcycle to work (60 km/day). I have a Honda XR125L. Today I had an accident. I was driving at 10-20 mph and wanted to break for cars that were standing still. I ...

motorcycle tires  
asked by Christophe De Troyer 4 votes
answered by Peter 4 votes

Oiling lawn mower air filters

Why does the air filter on a lawn mower need to be oiled? Is it true that major engine damage will occur if the intake air filter is not oiled?

air-intake lubrication small-engine air-filter  
asked by Andyz Smith 4 votes
answered by vini_i 5 votes

Assembly lube or engine oil when reassembling cylinder heads

I have read differing opinions on what should be used to lubricate cylinder head parts, such as valves, lifters, camshafts and bearings when reassembling cylinder heads. Some prefer engine oil while ...

lubrication cylinder-head  
asked by amphibient 4 votes
answered by Paulster2 4 votes

Greatest hits from previous weeks:

What is ECT Mode for? - Toyota Cars?

I'm not sure if this is a feature on Toyota cars alone, but I currently drive a '99 Avalon XLS and in addition to the D3 mode which I know disables overdrive, right above the radio near the top of ...

automatic-transmission performance towing  
asked by theonlylos 4 votes
answered by Brian Knoblauch 3 votes

Honda Accord 2000 V6 intermitently stalls when idling after start. What may cause it?

I have 2000 Honda Accord V6 with 140K miles and which is very well maintained and runs really nicely. However, every once in a while when I start it it would do some erratic rpm changes on idle and ...

accord rough-idle  
asked by Uncle Meat 4 votes
answered by Danny Yang 8 votes

Can you answer these?

Nissan vanette, low beams not working, high beams are! New relay wires still no change? It's a 1998

Work up to one head light no working on low beam. Both are working when on high beam. Checked all fuses, and the seem to be ok. Relay terminals are brand new. But after a week there is only one head ...

nissan  
asked by Tino 1 vote

Symptoms of valve adjustment necessity

I have recently had to rearrange my valve lifters in order to tune to an optimal clearance between cams and lifters, which on my Tacoma is 0.15-0.25 mm for the intake and 0.29-0.39 mm for the exhaust ...

valve cylinder-head valve-lifter  
asked by amphibient 1 vote

CD4E Transmission Flush

I just got a 98 Mazda 626 2L and need to flush the atx fluid, it's really dirty brownish red, but not burnt and I didn't notice any particles in it. I think the car has a CD4E tranny, and I've ...

automatic-transmission servicing  
asked by Robert S. Barnes 1 vote
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