Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [timing]

114 questions
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Strange noise from timing belt area

I just changed the timing belt and water pump on my 98 Mazda 626. After I got everything reassembled I started up the engine. I had been running the engine for a few minutes, revved it up to around 3k rpms a few times and started and stopped it a…
Robert S. Barnes
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Why would a water pump be run off of the timing belt?

I drive a 1999 Chrysler 300M, V6 3.5L engine. I am about to start a water pump replacement repair. I've discovered that the water pump is driven off of the timing belt, rather than either of the two fan belts on the front. This obviously complicates…
Woodrow Barlow
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Acceptable amount of slack in a timing chain with high mileage?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. FWIW, this model car/engine does not have timing chain inspection and/or changing as part of the routine maintenance schedule like cars with timing belts. …
Sparky
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Why are these paint dots under the timing belt cover not consistent?

I am about midway done with changing the timing belt & water pump on my 1999 Toyota, which features a 6-cylinder 5VZ-FE engine. After getting the front timing cover off, I discovered that there were some paint dots on the rear timing cover, and…
Cognitive Hazard
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Why do I need to turn my crankshaft after installing a timing belt?

I'm changing the timing belt on my 1996 Ford Ranger 2.3L. It's my first time doing a timing belt. These are the directions that came with the new belt: I have all the pulleys aligned and the belt is on and tight. Step 6 of the Installation…
ki9
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How much can sub-optimal octane affect efficiency or power?

Suppose a production fuel-injected engine is tuned for 93 octane fuel. As I understand it, the engine can still run on lower-octane (i.e., less knock-resistant) fuel, but it will pull timing to avoid knocking. In effect, on lower octane gasoline…
feetwet
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Single-cylinder engine - no camshaft position sensor?

I'm doing some research on the Honda CRF450. This is a single-cylinder engine. I'm interested in the fuel-injected models (not the older carbureted versions). As far as I can tell, this engine doesn't have a camshaft position sensor, so there's no…
Greg d'Eon
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High vacuum pressure on idle after timing gear and chain replacement

I just got my 1980 Chrysler LeBaron 318 V8 back from the mechanic, who replaced the timing gears and chain, which were the originals and very worn. Soon after leaving the mechanic, I noticed my vacuum pressure gauge was reporting high vacuum…
sehcheese
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Clicking noise in Opel Astra

I just bought a 99 Opel Astra and I have noticed a clicking noise in it. I opened the bonnet and it sounds like it may be coming from the timing belt! I really don't know though. The guy i bought it off says he got the timing belt done around 5000…
Sersh Browne
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What RPM to check timing?

I've got a question about my 1985 454 Mercruiser engine. I'm trying to adjust the timing but when reading through the engine manual it sounds like it's giving contradicting information. On page 27 is states: Timing (at Idle rpm) 8° BTDC On page 354…
Dehli
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Properly Aligning My Timing Marks

I've run into an interesting dilemma. I'm doing my timing belt / water pump on my 98 Mazda 626 2L and am at the point of putting the belt back on, but something has come up. I checked my timing marks before taking the belt off ( and a few other…
Robert S. Barnes
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How to determine TDC after bottom end rebuild?

I want to know how to find TDC on compression stroke, the only problem is how do you find it without the cams or valves(they would have been taken off and then put on again because this would be from a crankshaft replacement). to find it could you…
Nick Dean
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Diesel engine timing?

A petrol engine can fire the spark plugs slightly earlier or later to account for factors like revolution speed and engine temperature. However a diesel only fires when the mixture is compressed. There are no spark plugs to say "burn... NOW" I…
Criggie
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97 Honda Accord won't start after head gasket replacement

I recently replaced the head gasket on my Honda Accord. The cylinder head was tested at a machine shop and they also replaced the valve seals. I didn't do any work to the cylinders, except use degreaser to clean off the piston heads. I got the…
willpb
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Timing belt specification

I'm looking for the timing belt specification for my 1999 Subaru Legacy Outback. I need the number of teeth that are supposed to be between each mark, as my (replacement) belt came without the white marks. Do I need to use specific tooth numbers…
Cullub
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