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Old 04-30-2012, 06:56 PM   #26
Jet130
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Reaches boost very quickly - so that's ruled out....
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Old 04-30-2012, 07:00 PM   #27
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Runs very strong also. The shop that installed the motor is different from the one that built it. I'm waiting to name them until they refund part of the money, or send me a new block. They do quite a bit of business on Nasioc. So we will see.
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Old 04-30-2012, 07:01 PM   #28
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How do you check for Valve lash?
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Old 04-30-2012, 07:10 PM   #29
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You've got to take off the valve covers and stick a feeler gauge in between the lobes and the buckets. Not something I'd want to do with engine in car, but it can be done.
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Old 04-30-2012, 07:13 PM   #30
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Quote:
Originally Posted by Jet130 View Post
Runs very strong also. The shop that installed the motor is different from the one that built it. I'm waiting to name them until they refund part of the money, or send me a new block. They do quite a bit of business on Nasioc. So we will see.
Good choice. I would be hesitant before crucifying anyone. Eating crow is no fun. I've had my share.
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Old 04-30-2012, 10:08 PM   #31
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You didnt respond to the tensioner question....
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Old 04-30-2012, 10:43 PM   #32
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If they did a hybrid build with a stock head gasket, they failed completely and you need to get a refund and take your money elsewhere. You absolutely need a thicker gasket for that setup.
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Old 04-30-2012, 10:44 PM   #33
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Unless the pistons are cut for it, but, sounding like that, something is really badly screwed in there.
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Old 05-01-2012, 01:00 AM   #34
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Listened to it again. sounds external.

I would bet ..... Say $10 its the tensioner. Hey, I am not a rich man.
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Old 05-01-2012, 03:09 AM   #35
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Quote:
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You didnt respond to the tensioner question....
Not sure - but I'm leaning towards this being the problem. It's curious because when I get the car up to speed in just about any gear, and leave it at a constant RPM, it get completely quiet! Noticed that today. Also, when idling, when the fan kicks on, it get quieter as well.
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Old 05-01-2012, 04:00 AM   #36
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The load on motor will affect the tension on the timing belt which likely changes the tension/slap on the tensioner.

Drill a hole in the timing belt cover so you can stick a long metal rod onto the tensioner and stick it in your ear and listen. WHACK WHACK WHACK......
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Old 05-01-2012, 04:08 AM   #37
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I vote tensioner as well... its too clacky sounding and slow to be piston slap IMO
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Old 05-01-2012, 09:44 AM   #38
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Can you say piston slap....... man it surely sounds like it.
Heard a forged Audi 1.8T gone wrong just a day ago. Almost a 1 to 1 comparo eh.
TBH pistons slap doesn't really mean anything unless oil consumption is getting nasty. Other than that just live with it and boost on!

Cheers,

Jasper.
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Old 05-10-2012, 12:33 PM   #39
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Noise goes away when decelerating, and after 2.8k RPMS. Stumped.
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Old 05-10-2012, 09:37 PM   #40
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Take your timing belt covers off and the crank pulley, then put the crank pulley back on and turn it on and then watch the tensioner to see what it is doing when giving it some throttle. Also, take a mechanics stethoscope to listen to the tensioner while having someone give it some throttle. You will know if it is the tensioner or not pretty quickly....

But, that does really sound like a bad case of piston slap...
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Old 05-11-2012, 01:05 AM   #41
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Quote:
Originally Posted by Spacepope View Post
If they did a hybrid build with a stock head gasket, they failed completely and you need to get a refund and take your money elsewhere. You absolutely need a thicker gasket for that setup.
Not to side track but why do you need a thicker head gasket?
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Old 05-11-2012, 06:27 AM   #42
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If you follow post #40 and it's not that then from the consensus in this thread it's gotta be piston slap.

Like I said in the first reply, I've got a hybrid that sounds very similar and I know its piston slap. Maybe I will post up a vid and you will see....

Run some heavy oil and drive it like you stole it.
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Old 05-14-2012, 02:33 PM   #43
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What weight oil is good?
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Old 05-14-2012, 07:41 PM   #44
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Quote:
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What weight oil is good?
If you are in a fairly warm climate I would run RotellaT 15W-40. Your gas mileage will suffer slightly but the extra insurance is worth it.
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Old 05-14-2012, 09:43 PM   #45
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That really sounds like the timing belt tensioner. If its the timing belt tensioner then it should be really really easy to diagnose. Take the radiator out, take the belts off, take the timing belt cover off. Have a friend start the motor up for a few seconds while you watch the tensioner. If the tensioner and belt flop all over the place thats your answer.
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Old 06-04-2012, 10:57 PM   #46
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I used a dohc phase one block with sohc heads, used the sohc head gaskets and it sounded just like that.
Installed the dohc gaskets and it went away.
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Old 06-08-2012, 01:23 PM   #47
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Holy hell thats not JUST piston slap.... sounds like a few things. Like a major exhaust leak, valve shim clearance is way off, and some piston slap altogether.
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Old 06-09-2012, 08:21 PM   #48
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Quote:
Originally Posted by Spacepope
If they did a hybrid build with a stock head gasket, they failed completely and you need to get a refund and take your money elsewhere. You absolutely need a thicker gasket for that setup.
^^ not neccessarily if u got your heads machined to match the block. Actually stock gaskets (sti gaskets) can withstand alot..
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Old 06-09-2012, 09:08 PM   #49
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Put your hand on the timing belt covers while car is running (watch for the belts)

If the covers are shaking it is a big chance your tensioner is bad. That is how I diagnosed mine.

Better way to make sure is to take the center and driverside covers off and check the tensioner visually while car is running. It is doable without taking the radiator off.
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Old 06-09-2012, 09:42 PM   #50
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Are you still driving the car?
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