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Old 07-05-2010, 11:03 PM   #1
02_bluerex
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Default Rebuilt my motor, then this happened.....

TIMING BELT BROKE due to a bad tensioner pulley...this is the results..

Ok the youtube link pretty much sums up what happened but ill copy and paste it here...


Not too sure what this could be I had spun a bearing a month ago, then went ahead and decided to rebuild..I had the crankshaft ground down, installed .020 oversized acl bearings, and STi rods, with Wiseco Pistons. I had the block cleaned and honed and built it all back to spec, there seems to be nothing wrong with those, the heads got pressure tested and came back fine but now the passenger side is.ticking/light knock.....the oil is full to 6 quarts with my addition external oil cooler i needed another quart, the car doesnt smoke at all and Oil pressure is fine so it boost and A/F...its just odd

If anyone could chime in on what they think is wrong I would truly appreciate it.. im frustrated and at a loss right now...thinking maybe, possibly a bucket for the cams was mixed up but I dont think so..I just dont know.

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Last edited by 02_bluerex; 07-20-2010 at 05:47 PM. Reason: Updated...
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Old 07-05-2010, 11:34 PM   #2
CKxx
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It sounds like my old pistons used to slap, but about 20x louder. From the video it certainly seemed to be coming from the head area.
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Old 07-05-2010, 11:38 PM   #3
FuJi K
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you didn't drop a shim, did ya?
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Old 07-05-2010, 11:55 PM   #4
02_bluerex
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No im sure of that I individually bagged and tagged the buckets with their proper shims and thought i installed them back the way i pulled them out, Im sure the shims are there just not too sure all the buckets are back in their right location....

*Update.... I let the car cool off for a while then restarted, and the noise was GONE!
BUT only for about 10 minutes til it fully warmed up then I heard it again!!!???
This suxxx lol
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Old 07-05-2010, 11:58 PM   #5
reddevil
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bad tensioner.... check it....
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Old 07-06-2010, 12:01 AM   #6
02_bluerex
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as in timing belt tensioner? idler pulley tensioner? What?
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Old 07-06-2010, 12:26 AM   #7
reddevil
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Timing belt tensioner.
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Old 07-06-2010, 12:28 AM   #8
reddevil
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Pull off the timing belt cover and stick the mechanics stethascope on the tensioner.... I bet $10 thats it....
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Old 07-06-2010, 12:40 AM   #9
02_bluerex
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I just replaced it though with a gates timing belt kit with all pulleys and new tensioner
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Old 07-06-2010, 12:44 AM   #10
FuJi K
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Just look at the tensioner. You'll see if it's oily or not. If oily then replace because the seal broke. If dry then you're good and look else where.
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Old 07-06-2010, 12:52 AM   #11
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ok will do thanks guys... sorry im just a bit frustrated lol...
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Old 07-06-2010, 01:07 PM   #12
7L Autosport
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If it's not the tensioner, try taking off the valve cover on that side and checking the torque on the cam retainers / journals. If those aren't properly tight the cam itself will tend to bounce around a bit and make a noise like that - I've seen it happen! It's unlikely but it's not too hard to check just in case.
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Old 07-07-2010, 12:50 AM   #13
Texy32
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I think it was the tensioner because today his timimg belt jump off the track!!!
I think that he might have bent a few valves.
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Old 07-07-2010, 01:22 AM   #14
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^^^^ dammnit
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Old 07-07-2010, 02:04 AM   #15
reddevil
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Did you disassemble the block? did you WHACK the block apart on the upper idler bolt point? This will mess up the seating for the idler bearing and toss off the belt.... I did that once.
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Old 07-07-2010, 11:56 AM   #16
02_bluerex
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Yes I disassembled the block, and no I did not whack the block apart lol I used a scissor jack on the back half of the block by the flywheel area with cardboard to split the block, I think it may have been either a simple f#ck up by me installing it or a bad tensioner.....either way more money I dont have hahah
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Old 07-07-2010, 03:18 PM   #17
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sounds like a spun bearing to me. Probably had some contamination from the previous spun bearing. Did you change out the factory oil cooler?

-- Ed
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Old 07-07-2010, 04:03 PM   #18
02_bluerex
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Yes, its not a spun bearing again! lol I did completely remove the factory oil cooler for a 25 row mocal external cooler, thermostat sandwich plate, and -10 an lines and fittings...I had the heads, and short block halves cleaned, and installed another oil pan to make sure...
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Old 07-08-2010, 06:05 PM   #19
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just a little fyi... and "oversized" bearing is actually a thinner bearing than stock, an "undersized" bearing is thicker than stock... when you grind a crank you actually want to install "undersized" bearings (undersize refers to the crank diameter, you have an "undersize" crank so you want an "undersize" bearing)

...just my .02 cents
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Old 07-08-2010, 07:09 PM   #20
02_bluerex
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Thank you for the heads up I used the wrong verbage apparently, when I had the machine shop grinded the crank they ordered the appropriate main and rod bearings as well.. I could of just said the wrong thing.

Last edited by 02_bluerex; 07-08-2010 at 07:15 PM.
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Old 07-08-2010, 07:21 PM   #21
EROCS04SBRUSTI
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man your dilemma really sucks!I'm subscibed to find out what happened.Sounds like my luck on my supra right now.
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Old 07-08-2010, 07:41 PM   #22
02_bluerex
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Here are some photos of what was done before I intalled everything and before the video from my OP was made..

http://s8.photobucket.com/albums/a8/asierra_999/Work%20on%20the%20REX/
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Old 07-08-2010, 08:13 PM   #23
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What spark Plugs do you have?
Check the Spark plugs. Sometimes it can make a popping sound like that which means it bad. The ceramic part was loose which made that sound.
Sounds like it the front left making the noise. Thats the same position that mine was broken.
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Old 07-08-2010, 08:34 PM   #24
02_bluerex
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brank new NGK Iridium IX
I checked and they are fine, thanks though...
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Old 07-08-2010, 08:35 PM   #25
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no problem...good luck in your finding.
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