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TIMING BELT: Installed Wrong
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STEALTHZILLA
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May 31, 2016, 4:13 PM
Post #1 of 12
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TIMING BELT: Installed Wrong
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...ALL INPUT WELCOME...
1992 MITSUBISHI 3.0L DOHC INTERFERENCE motor: I counted 48 teeth/Cam gear & 24 teeth for Crank gear, affirming that crankshaft turns 2 times for 1 turn of cam. Good so far? If timing belt is installed with ALL cam marks correct BUT crank marks NOT: 1) Each crank tooth off equals how many degrees? About 7.5/tooth? (720รท24=7.5) 2) Is this enough error to cause piston/valve contact & damage? I'm assuming ANY contact will 'leave a mark'? 3) Might a person get lucky enough to see piston marks by looking thru spark plug hole & not taking off head(s)??? MUCH Thanks.
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Discretesignals
Ultimate Carjunky
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May 31, 2016, 4:42 PM
Post #2 of 12
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Re: TIMING BELT: Installed Wrong
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How many teeth was the belt off? 1 or 2 teeth off may not make valve crash happen, but more than that and your chances are high. When you installed the new belt and timed it up did you rotate the crank twice to be sure you had no binding and that your marks were still in the correct spots.
Is the belt on correctly now? Not sure if you'll see kiss marks on the pistons, but a cylinder leak down test will confirm damaged valves. You could also take your chance and put it back together correctly and see how it runs.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 31, 2016, 4:44 PM)
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Hammer Time
Ultimate Carjunky
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May 31, 2016, 4:44 PM
Post #3 of 12
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Re: TIMING BELT: Installed Wrong
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If you rotated the engine forcefully with the crank out of time, you can pretty much bet that you bent some valves. You would have to get it into time correctly and do a leakdown test.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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STEALTHZILLA
User
May 31, 2016, 8:48 PM
Post #4 of 12
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Re: TIMING BELT: Installed Wrong
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Sorry 4 delay. A shop did the work. 2nd shop inspected, cams were fine crank off ABOUT 8 degrees. Noise is about as loud as a rod knocking, gotta be metal hitting metal?! Only had front bank compression ckd, but rear head gasket leaking! Couldn't make sense of manual regarding compression specs range? Around 150, 145 maybe worst of 3 cylinders. Bought car with SUPPOSED rebuilt motor, maybe 45,000 mi on it now.
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Discretesignals
Ultimate Carjunky
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Jun 1, 2016, 4:29 AM
Post #5 of 12
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Re: TIMING BELT: Installed Wrong
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When you bought the car was the engine running good? Did all these problems start after the timing belt job?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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STEALTHZILLA
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Jun 1, 2016, 5:14 AM
Post #6 of 12
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Re: TIMING BELT: Installed Wrong
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When bought car, had fair share of probs., tranny rebuild $3400! ECM, none motor related, sound & strong! Put on TEIN suspention, wheels, tires. Just idler bearing loud & no worse in 3 yrs. BAD oil leaks! Thought rocker covers & oil pan. Wanted ALL leaks fixed so can do paint & body restore. Took 2 shop for leaks, tune up, tranny fluid/filter & set of engine mounts from 3SX. Was told t. Belt oil soaked by cam seals, fine. Gave other recommendations, crank pulley & a connector from filter to rail. Fine. After tons of B.S., writing corporate office, got car back 10 F'ing weeks later! Upon start up could tell not right! They had it 6 MORE WEEKS! No diff except for fixing all vacuum leaks they caused. No acceleration, performance, Sh!t gas mileage, extreme vibration & LOUD from belt & valve area. Sounds fine to them & all else is due to stiff mounts. July 2nd will be 1 year! My trial is July 1st.
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Hammer Time
Ultimate Carjunky
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Jun 1, 2016, 8:19 AM
Post #7 of 12
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Re: TIMING BELT: Installed Wrong
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If you haven't learned this already, NEVER take your car to a chain store location for serious repairs.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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STEALTHZILLA
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Jun 1, 2016, 9:46 AM
Post #8 of 12
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Re: TIMING BELT: Installed Wrong
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Thanx HAMMER TIME. I agree. Wasn't my 1st choice, long story. I would greatly appreciate ur input, etc. regarding my questions, reasoning, calculations in 1st post of this thread? Thank you...
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Hammer Time
Ultimate Carjunky
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Jun 1, 2016, 11:32 AM
Post #9 of 12
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Re: TIMING BELT: Installed Wrong
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Both DS and I have already advised you to do a leakdown test and you haven't even acknowledged that.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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STEALTHZILLA
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Jul 1, 2016, 2:46 AM
Post #10 of 12
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Re: TIMING BELT: Installed Wrong
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Sorry my friend. Had thought the 2 tests' were basically same? Now know r not. Did have compression test on front bank only cuz doing rear bank more difficult, but rear head gasket leaking. Got readings of 160 - 160 - 155. Manual shows Standard=185 , Min.=139. So above min. But much more below Standard. Is this enuf of a % change to cause concern or grief??
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STEALTHZILLA
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Jul 1, 2016, 3:23 AM
Post #11 of 12
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Re: TIMING BELT: Installed Wrong
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Hi DS, shop did the work. Cam marks r good, Crank marks off. Must not have taken ALL slack past crank, so when crank turned cams did not until slack moved past crank & now crank starts pulling a tight belt, thus pulling cam gears. But since car driven like this, i guess YES, had to have been 'forced'. So 1 crank tooth = how many degrees?
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Discretesignals
Ultimate Carjunky
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Jul 2, 2016, 6:15 AM
Post #12 of 12
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Re: TIMING BELT: Installed Wrong
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What about the rear bank's compression? This sounds like a big mess to me. If it ran before you took it to a repair shop and doesn't after, that repair shop is responsible for fixing the issue. If they can't fix it, they need to find another shop or mobile diagnostic tech to figure out what is going on. You shouldn't have to pay for their mistake. Don't understand why you are trying to figure out tooth degrees and such when it wasn't your responsibility in the first place. You placed that responsibility onto the shop you hired to perform the repair. The shop probably got in over their head and you are stuck with a non running vehicle. They are responsible in figuring out why it won't run, not you. If you choose to figure out and repair their mistakes yourself without some sort of compensation from the repair shop, then they just took advantage of you and will probably do it to someone else.
What does your lawyer suggest?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 2, 2016, 6:25 AM)
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