1999 Camry, no compression in Cylinder 1?

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Old 27 May 2013, 10:04 pm   #1 (permalink)
mrdarrett@gmail.com
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Default 1999 Camry, no compression in Cylinder 1?

Borrowed a compression tester from the auto parts store and installed it into Cylinder 1. With the timing belt off, I rotated the crankshaft, and got no change in pressure, no matter how many times I rotated the crankshaft.

Camshaft was set to the notch at the 11:30 position.

Wondering why I get no compression.

Tempted to just set the crankshaft to TDC by the marks and I have a 50-50 chance of getting the compression stroke...


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Old 27 May 2013, 11:32 pm   #2 (permalink)
mrdarrett@gmail.com
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Default Re: 1999 Camry, no compression in Cylinder 1?

On Monday, May 27, 2013 8:04:23 PM UTC-7, mrda...@gmail.com wrote:
> Borrowed a compression tester from the auto parts store and installed it into Cylinder 1. With the timing belt off, I rotated the crankshaft, and got no change in pressure, no matter how many times I rotated the crankshaft.
>
>
>
> Camshaft was set to the notch at the 11:30 position.
>
>
>
> Wondering why I get no compression.
>
>
>
> Tempted to just set the crankshaft to TDC by the marks and I have a 50-50 chance of getting the compression stroke...



Oh I think I know why I have no compression. Gauge threads aren't for my Camry. Only 1/2 turn and the hose comes out. Taking the 50-50
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Old 28 May 2013, 04:55 am   #3 (permalink)
Fat-Dumb and Happy
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Default Re: 1999 Camry, no compression in Cylinder 1?


Unless you think you have a blown head gasket, I wouldn't worry
about compression. How many miles does this thing have on it?
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Old 28 May 2013, 11:53 am   #4 (permalink)
mrdarrett@gmail.com
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Default Re: 1999 Camry, no compression in Cylinder 1?

On Tuesday, May 28, 2013 2:55:37 AM UTC-7, Fat-Dumb and Happy wrote:
> Unless you think you have a blown head gasket, I wouldn't worry
>
> about compression. How many miles does this thing have on it?



133,000 or so.

I was hoping to use the compression tester to find TDC, as the Haynes manual suggested.

I took the 50-50, figuring if worst comes to worst, it just won't start, but the car started right up! (I used the old timing belt for the test.)

If I'm off by one timing belt notch, will fuel economy suffer? I was goingby the marks on the crankshaft gear, since I read somewhere that the notchon the crankshaft pulley can be off because the rubber on the pulley deteriorates... and I think that happened in my case.
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Old 28 May 2013, 12:13 pm   #5 (permalink)
Fat-Dumb and Happy
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Default Re: 1999 Camry, no compression in Cylinder 1?

you need to get it exactly right, something will suffer if you don't,
drivability, idle, power, fuel mileage... probably all of them.
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Old 30 May 2013, 06:43 pm   #6 (permalink)
mrdarrett@gmail.com
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Default Re: 1999 Camry, no compression in Cylinder 1?

On Tuesday, May 28, 2013 10:13:35 AM UTC-7, Fat-Dumb and Happy wrote:
> you need to get it exactly right, something will suffer if you don't,
>
> drivability, idle, power, fuel mileage... probably all of them.



Yeah... I tried the engine again when it was 15 degrees *after* TDC, and to my astonishment it sounded just fine, like you'd never know it was off... I found that disturbing.

Then of course I set the timing belt to TDC.
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Old 30 May 2013, 10:40 pm   #7 (permalink)
Benjamin.Kubelsky
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Default Re: 1999 Camry, no compression in Cylinder 1?

On 5/30/2013 4:43 PM, mrdarrett@gmail.com wrote:
> On Tuesday, May 28, 2013 10:13:35 AM UTC-7, Fat-Dumb and Happy wrote:
>> you need to get it exactly right, something will suffer if you don't,
>>
>> drivability, idle, power, fuel mileage... probably all of them.

>
>
> Yeah... I tried the engine again when it was 15 degrees *after* TDC, and to my astonishment it sounded just fine, like you'd never know it was off... I found that disturbing.
>
> Then of course I set the timing belt to TDC.
>



They will often sound fine off by that much at idle. You would surely
notice less power driving though.

Jack
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