Question about Toyota RAV4

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Rav 4 2.0l vvti engine interference or not? Help

Think my chain tensioner has gone and now timing out, would this have caused damage?

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  • Contributor
  • 8 Answers

Yes it coult bent valve and damege engine piston

Posted on Apr 01, 2014

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6ya6ya
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Posted on Jan 02, 2017

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daves944
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SOURCE: Timing chain or belt for a 2004 Honda Accord

It depends, 4cyl. is a chain, the 6cyl. is a belt and it is an interference engine. I have not done this one yet, but Hondas are never that easy.

Posted on Mar 17, 2009

whispers76
  • 55 Answers

SOURCE: engine seized driving down road, now won't even turn over

The 3 liter mitsubishi is pretty prone to this actually. You would have to tear it down to see what happened, but yes it's likely that you have a bent valve and/or hole in the top of a piston from a valve.

Posted on Jan 10, 2009

  • 11 Answers

SOURCE: replaced timing chain on a toyota corolla vvti

seems like the engine isn't timed right, either the timing marks aren't lined up or if there is a distributor it isn't in time with the crank and cam

Posted on Oct 07, 2009

SOURCE: How to retime a 2000 Lincoln Ls with a 3.9 v8

I have a 2004 and all the service manuals. I have never worked on this type engine,although I have been at it for 45 years,some professional,when I owned a shop. That said, I will try to answer a specific question, if I can find it for you. Short of you buying all the manuals I have or mailing you mine.

I'am looking at the Workshop Manual-it has three locations on the 3.9L, two on disassembly and one on installation. Nice pictures,and necessary stuff,but near useless. Several hundred dollars for these. Got to have them,but not helping you or anyone else.

It looks like you need to have a tool to lock the flywheel in place. eg. one of the holes the CKP Sensors scans. It's called an ignition pulse wheel. One hole is special. Turn crank 45 degrees ATDC,the crank keyway will be at 6 o'clock,install tool
Also,a tool to hold the flats on the cams, to the top
If you don't have the cam sprockets and chain on.from your head service shop,more tools.
Then you have several locking pins,like dowel pins to hold everything,while you struggle with the chain tensioners,again ,more pins

That's a start.

Posted on May 05, 2010

Transdoc
  • 829 Answers

SOURCE: 2006 cobalt 2.2 liter-----timing chain broken

I have never seen a chain motor that was not interference.

Posted on Sep 30, 2010

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1 Answer

Can the tensioner make the chain to be loose inside the engine an cause it to make noise an show sign of oil on the dashboard?


A loose timing chain tensioner will not cause the oil lamp to light. The noise you are hearing is most likely valve noise due to oil starvation. The oil light comes on when the oil pressure is too low to be safe for the engine. Most people believe it is to tell you the oil level is low. A low oil level can cause low oil pressure is the oil is below the sump, but low oil is not the cause of the light - low oil pressure is. This can be due to a number of things, such as a bad oil pump, faulty bypass regulator at the oil filter, loose sump pipe connection, or even an oil gallery plug that comes out internal to the engine. You need to stop using the vehicle immediately and have the oil pressure checked with a mechanical guage to determine if the problem is the oil ressure or the sensor that lights the light. The chain tensioner being loose CAN cause noise, and that itself is an issue that should be fixed, as in many vehicles a loose chain can jump time, or jam and break, and since many cars have interference engines, either of these scenarios can cause severe internal damage to the engine.

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1 Answer

2000 V6 engine Ford Taurus. When the chain breaks, how much damage does it cause?


The 3.0L Vulcan engine in the 2006 Ford Taurus is a non-interference engine. Thus, when the timing chain breaks, there will be no piston or valve damage as a result of the cam and crankshaft getting out of synchronization. The "steam" you see is probably some combustion gases coming back up through the intake from any open valves that were trying to fire after the chain. broke. That isn't saying that there cannot be damage....you must look inside the timing chain area. There is the possibility (albeit remote) that there could be some damage in that area, more likely if you have a manual transmission. But you probably will only have to replace the timing set and chain tensioner to get it back up and going. Plus a few gaskets and some fluids of course.

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If the timing chain just skipped a few teeth will it damage the heads with continuously trying to start it?


Urgently change the chain, it will cause wreckage in the engine!

Do not crank it, it will cause the engine cycle rotation and damage it.

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2001 Chevrolet tracker sports package is 2.5engine an interference engine or not. think timing chain is gone no compression shut off then will not start.


Well you are right in saying you have a chain and not a belt.
Engines with timing chains are almost never interference engines, and yours is not on that list.
Its probably one of the tensioners or idlers that has failed.

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2 Answers

Are the V6 engines Free spinning?


Hi Lukegerny,
No,the V6 engine is not free spinning. If the timing chain breaks, leaving the valves open as the piston moves through its travel,there will be damage to the valves.How much damage will depend on speed of engine and length of time it ran. You can perform a leak down test to check the condition of the pistons and valves. It will tell you if the valves are not sealing,without having to take it apart. Thanks,Chuck.

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TIMING CHAIN CHANGE


hyundai recommends replacing the belt every 60,000 miles or 48 mos and this is an "interference" engine which means if the belt breaks, it will cause internal engine damage. happy holidays

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2 Answers

Do the valves connect with the pistons on the 1992 plymoth voyage


you should be ok.. i have never seen valve damage on one of these engines after belt breaking..just retime everything and install a new belt..make sure you check water pump and tensioner bearing for looseness/wear

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2 Answers

Timing chain for toyota yaris


What is the issue you are having? Chains do strech but to to the point of failure there should be some major performance issues. If there is a lack of oil changes this could cause premature chain failure.

Low oil level will cause the tensioner to not work adequitly.

Also I have replaced the VVTi controller on the intke cam a few times for lack of performance, always has trouble codes to go along with poor performance tough.

May 12, 2009 | 2007 Toyota Yaris

1 Answer

Eninge knock with a known cam gear problems.


i had the same problem. had a knocking on the engine and let the vehicle sit until i had time to look for the problem. my unknowing mom took the car without permission and the car broke down on her. as it would turn out the upper timing guide rail broke off and damaged the cam gears and broke the upper timing chain along with damaging both the right and left lower chain guides, and the tensioner was also damaged. i would recommend that u inspect the lower chain to make sure that everything is good.

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When should you change a timing belt for a 1999 magna advance?


Call the dealer or get a Haynes service manual (about $20US) for the vehicle.  DO NOT use what anyone on this or any other forum tells you as gospel, since many Mitsubishi engines are interference in design (read: when the belt or chain breaks, valves and/or pistons can be severly damaged).  
Belts have a mileage rating, and whil I haven't seen a strictly set number of years they will last,  they are synthetic rubber and will over a long period of time (say a decade) get brittle even if the car is only drive to the store on sundays.  Chains last much longer.  Belt intervals go from 50K miles to 100K miles in the states
When you do the belt,replace the tensioner and any rollers in the path as well as the water pump and possibly the crank and can front seals.   The parts are cheap compared to the labor.  A $20 timing roller or tensioner gone bad, can cause a couple thousand dollars damage when it cause the belt to break !

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