Question about 1998 Ford Taurus

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No compression after setting valves as described in repair manual

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Ur simply miss reading the manual, u dont say if u have had the belt off?? either the timing gears are out of alignment or (if it runs on tappets) u have gauged the wrong valves, as in adjusting the wrong valves at the wrong time. read ur manual again, u have made a simple mistake somewhere.

Posted on Jul 13, 2010

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Trying to replace broken timing belt. Trying to set #1 cyl. to TDC manually. no compression reading on 1 &4, readings on 2 & 3. What could cause this?? HELP!!


Hole in the piston crown is the worst Charles, but let's not be pessimistic :>(

More likely valves open. At TDC firing stroke both inlet and exhaust valves should be closed. The flat, low part of the cam should be on the followers. So 1 and 4 have valves open, 2 and 3 are closed. If you turn the cam 180 degrees, you should have compression on 1 and 4 and no compression on 2 and 3.

The other thing though, is that when the timing belt breaks, the valves are often in the wrong place at the wrong time and can often meet the piston head on. This can bend the valves. or damage the piston. The normal advice is to remove the cylinder head to check, and then service the valves whilst you have it apart.

A job like this, you need a workshop manual.

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What are the valve lash specs for 2007 Honda Accord V6?


There is a specific procedure for setting valve clearance . I highly recommend getting a repair manual for the correct specs & procedure. The engine must be at TDC with the #1 cylinder on the compression stroke , that will allow you to adjust ONLY certain valves , then you have to turn the engine one turn to TDC again only now #1 will be on the exhaust stroke & the rest of the valves can be adjusted . it's important that you know the difference between the two !

Jan 08, 2015 | Honda Cars & Trucks

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00 buick century 3.1 70,000mile just had a head job done, car is missing on # 1 and 5 cyclinder, wen i tighten the rocker arms i have no compression, but wen i lossing it then i got compression i change...


There are two different size push rods on that engine. The longer ones are for the exhaust valves. If you have an exhaust push rod switched with an intake push rod it can cause the problem you are describing. Usually you will bend a valve when you get them mixed up.

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How to chage valve seals


1- disconnect battery
2- remove valve cover
3- remove timing cover
4- set engine on top dead center #1cylinder
5- remove timing belt ( mark direction if re-using belt)
6- remove camshaft & rocker arms
7- remove spark plugs
8- install compression tester hose in cylinder that you want to replace seals and apply 90 to 120psi of air
9- install valve spring compression too and compress valve spring
10- remove valve spring locks and valve spring
11- remove old valve seal and replace with new
12- reverce order to reasable

Nov 16, 2010 | 2003 Hyundai Accent

1 Answer

Valve timing settings for nissan navara 1999 ka24de many thanks wayne.


There is a lot to this. Your best choice is to get the Haynes Repair Manual on the vehicle so you have that to reference. The Number one valves are set for the compression Stroke, this is where you want them, when both valves are closed. The little Key on the Front where the Timing belt mounts will be toward the 12 o'clock position.

Jun 28, 2010 | 1997 Nissan King Cab

1 Answer

Can you tell me or send me a diagram how to line up my timeing belt on a Geo Tracker


Unfortunately there is more to it. You have to put the #1 Cylinder to Top Dead Center on the compression stroke. You need to make sure the valves are set so the number one set of valves are on the compression stroke. Then you need to align the timing marks on the timing gears correctly and get the timing belt on. If the original belt broke while the engine was running you want to make sure and get that head checked and verified as good. If any of this does not make sense you need to get the Haynes or Chilton's repair manual on your vehicle so you have step by step instructions for doing these steps.

Jun 25, 2010 | 1995 Geo Tracker

2 Answers

Had the timing belt break on my 1997 Honda accord change the belt and water pump did compression test cause motor was shaking even do the timing was set right so had mechanic look at it and said it bent a...


yes a bent valve is a very hard task, you must of couse pull the engine cylinder head off and then replace the valve, this takes special tools.

May 19, 2010 | 1997 Honda Accord

2 Answers

2001 cavalier - lost all coolant, engine turns over as if no compression, oil doesn't have coolant mixed in, head doesn't appear from top to be cracked


Unfortunally head nomally crack on the under side between the valves. Check the spark/glow plugs to see if they have coolant on them.

Jan 03, 2010 | 2001 Chevrolet Cavalier

1 Answer

Problems with power recovery Exhaust smells


It sounds like you have mechanical problems with your engine instead of a "bad" sensor. You can pay for a scanner to be put on your vehicle, but the scanner takes into account, that the rings and valves, as well as the compression is all fine. The smell of sulfur you smell is oil going through your catalytic converter. A repair shop will first charge you for them to place a scanner on your vehicle yet that will not give them the answers they need so expect to pay for a compression test...both "dry" and "wet" (20 cc's of oil in each cylinder), to establish the condition of the rings and valves as well as an additional charge for a Cylinder Leakage Test. This is all done BEFORE they can tell you what's wrong. Possible engine replacement from what you describe here, yet get yourself a Haynes Manual, number # 50025, which is for your Jeep as well as a compression tester and vacuum gauge and you can diagnose most of the problem yourself.

The cheapest and quickest way to check the mechanical part of the engine is: while it's running, place a dollar bill under and against the tail-pipe. If the dollar bill flaps into the tailpipe at any time, then you've got Engine Mechanical Problems for this "test" shows that a valve or valves are either burnt, sticking or carboned up. Before doing anything involving test equipment, just take a paper bill and see if the bill goes up towards or inside of the exhaust pipe.

"00 Buck"

Nov 06, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Need assitance for vw repair


You are probably right, the clearance between the pistons and the valves is very tight on the 16 valve engines. one of the valves may have hit a piston., or even worse bent a rod or damaged the crank.
I would run a compression check, or leakdown check before pulling the head. I have a service manual for 90-93 Passats w/ 9A 16 valve engines. the manual says compression should be 145-189 psi. limit 109 psi w/ 44 psi max difference between cyclinders.

On these engines you also need to check that the timing on both cams is ok.

Apr 16, 2009 | 1984 Volkswagen Scirocco

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