Question about 1985 Volvo 740

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VOLVO 850 T5 CAMBELT SNAPPED BENT VALVES, FIXED ALL THAT NEW BELT

AFTER THE HEAD WAS ASSEMBLED WITH NEW CAM BELT,CAR STARTED FINE -IDLED FOR A WHILE ,THEN CUT OUT. CHECKED SPARK, FUEL ETC. CAR WOULD NOT START, BLACK SMOKE WHEN CRANKING THE ENGINE. CHECKED SPARKPLUGS ALL DROWNED IN FUEL,CLEARED EXCESSIVE FUEL , RESTARTED IDLES 100%,BUT IF ACCELERATOR IS PUSHED SLOWLY IT FLOADS AGAIN. LEAVE A WHILE START IT WITH THROTTLE WIDE OPEN , EVTUALLY IT PIFS,PIFS PIFS AND THEN STARTS LIKE FLOADED VEHICLE. HELP ? ? ? .PENSION GUY WITH LIMITED CASH RESOURCES
Johan Roos City of Welkom South Africa
EMAIL zs4kb@absamail.co.za in the Republic of South Africa

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Do a fuel pressure check it should be around 38-40 psi, if low check fuel pump relay and fuel pump

Posted on Jan 09, 2009

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Check the codes and see if any are stored. Make sure all the wiring to the sensors and engine ground wires are connected.

Bret
RepairPal.com

Posted on Nov 30, 2008

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2 Answers

What issues can I expect if it doesn't restart?


If the belt broke you are facing bent valves in the cylinder head. If the vehicle is single over head cam.... bet on bent valves. If the vehicle is dual over head cam ... you may be ok. The dealership should be able to perform a cylinder leak down test to determine whether or not the there is a valve issue before disassembling anything.

Mar 01, 2016 | 2007 Chrysler PT Cruiser Touring Hatchback

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Cambelt broke on start up


If you broke a cam belt then you have serious damage in the head. the cam shaft holds several valves open at various stages of the cycle and they are hit by the pistons as the engine turns over resulting in bent valve stems. No easy cheap fix as the head has to come off to replace the valves.Best you find a qualified reliable mechanic to do the job and it will cost

Jan 11, 2013 | Cars & Trucks

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CAR STALLED. DISCOVERED TIMING BELT HAD BROKEN. REPLACED BELT. STILL WILL NOT START BUT WILL TURN OVER


It sounds like the timing is still off, which will not allow it to start, or you have a faulty cam, or crank sensor.

Apr 14, 2011 | 1993 Volvo 850

1 Answer

How to fit a cambelt on a volvo s60 t5


remove drivers wheel then plastic wheel arch then put jack under engine and remove the engine mount then take off fan belt and timing belt cover mark your two top cam pullys and the crank pully then remove your belt and tensioner put new belt and tensioner on making sure all your marks line up then put on the crank pully and turn engine over twice by hand using a ratchett on the crank pully bolt if it turns over and your marks still line up put it all back together and start the car

Mar 14, 2010 | 2002 Volvo S60

1 Answer

Hi got a 96 850 diesel estate the fuel pump timing belt snapped had new one fitted plus new cam belt all timing reset but mecanic can only get it running ticking over wont rev and smokes checked timing no...


Sounds like the mechanic has to go back and figure it out. For all we know the valves are bent now and you may have a hole in a piston. We have no idea since we have no diagnostic data to go off of.
Maybe the belt was put on wrong.
Maybe the mechanic has never done this before
There could be alot of maybe's and the only person to know for sure is the person working on the car.
I would put a diagnostic scanner on the car to see if anything looks wrong and see if any codes would indicate anthing,

Feb 12, 2010 | 1996 Volvo 850

2 Answers

Timing belt snapped


hi from uk the cambelt timing marks for accent 1.3/1.5 petrol are as follows= the cam cog has a hole drilling between the outer toothed and the central securing bolt this hole at TDC number 1 cyl is at top central and lines up with a V cut in the cyl head at rear of cog ? the crank cog at TDC number 1 cyl is a pop mark on both the cog and on thefront face of engine quite noticable ! these line up and are at approx 12 -30 pm when viewed fit new belt from crankcog in anticlockwise ie crank then cam then tensioner HOWEVER! if you are considering just replacing belt and tensioner ? be warned this engine is an interferance engine that is to say if belt fails whilst driving there may/will most probably be damage to the valves (bent) due to contact with pistons so would advise caution and suggest compression test all cyls after fitting new belt and tensioner and before rebuild completely once valves have bent they will not contact pistons again but you will have serious missfire/s and probably back fire up inlet manifold coupled with failing to start if engine is high milage ? consider removal of cyl head and check? de coke and replace damaged or best all valves then engine will have improved performance and more milesin future hope this helps

Nov 28, 2009 | 2001 Hyundai Accent

2 Answers

My 850 volvo t5 engine wont start at all


FIRST CHECK THE FUSE IT IS THE FIRST OR SECOND ONE IN THE FUSE BLOCK NEXT IS TO PUT A SHOT OF EITHER IN AIR BOX AND SEE IF IT KICKS AND NEXT IS TO CHECK THE IGNITION SYSTEM FOR SPARK AND TIMING BELT FOR PROPER TIMING

Apr 21, 2009 | 1994 Volvo 850

1 Answer

Fan belt broke cambelt!


Hi
Yes, very true, I should have thought that it would have been sensible procedure, to renew a contaminated fan belt.

I also believe that the cam belt cover should have been removed, to inspect the cam belt, for oil contamination at that time too.
As an oil saturated cam belt would be more consistent to a failure, than a fan belt snapping and getting behind the cover, causing cam belt failure !

You have to seek an appointment with the Dealer Manager, and voice you dissatisfaction with there service, and that the resulting costs would not have been necessary, had my first 2 options above been carried out.
As usual, this smell of shoddy main Dealer Servicing.

By the way, what have they told you the estimated damage is to the engine ?
Normally it would only be a couple of bent valves, requiring, the cylinder head removal, fit new valves, cam belt, fan belt,etc, and reassemble, change oil & filter, & test coolant strength.

Good Luck !

A FixYa rating would be apreciated please !

John.

Feb 07, 2009 | 2005 Ford Focus

1 Answer

Can any body help put cambelt back together


You need to rotate the cam until timing marks on the sprocket are in line with the head, then make sure crank shaft timing mark is lined up. Install the belt. Might have to loosen the timing belt tensioner. Put timing belt tensioner back on, rotate the crank shaft with a wrench first to make sure there's no interference. Next, check compression.

Jan 03, 2009 | 1994 Honda Accord

1 Answer

93` 850 volvo. no timming marks


If your timing belt belt broke, you have damaged the valves and the cylinder head will need to be removed and rebuilt, or replaced.

Dec 11, 2008 | 1993 Volvo 850

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