[T2] Power loss in 4th

[accessys at smart.net]

have to agree with Jamie, I've had spark plugs blow and there is no 
mistaking it.

also might check fuel lines and filter I lost power once when warm due to 
pinhole leak on vacuum side of fuel line, was tight when cold but when 
engine and area around engine got warm the fuel line got soft enough for 
it to suck air. took me about 4months to find and 5minutes to fix

fuel filter is easier, just change it they are cheap and easier to change 
than to check.

good luck
Bob


On Mon, 16 May 2016, Jamie wrote:

> Date: Mon, 16 May 2016 17:15:03 -0400
> From: Jamie <jrivers at globalserve.net>
> To: Avocado Tom Tarka <avocadotom at gmail.com>
> Cc: type2 at type2.com, John Rogers <arathorn.rogers at gmail.com>
> Subject: Re: [T2] Power loss in 4th
> 
> well.. I really don't think the spark plug is your issue... when they loose 
> compression,, you know it!  because the go BANG! then puff air in and out..
> otherwise the spark plug was still in place,, hot or cold.. it was still 
> sparking,, and there would be no loss of compression,, but if there was loss 
> of compression,, you would have heard it leaking past the plug like a big 
> whistle.. or squirrel,, or chipmunk....... from my experience anyway....
>
> if the helicoil came out neatly.. you can insert another in the same 
> threads..  what I find is the ones that come out were not installed deep 
> enough and the plug tightened on the coil before it hit the head... if it was 
> a helicoil insert.. and it came out..... i dunno
>
> so , pop in a new helicoil,, and do your compression checks again... heat up 
> the engine till it looses power ,, and do a compression test again...
> while you're checking the compression,, check the valve lash too...  use a 
> VAC gauge on the manifold ,,
> and if you have hyd lifters... make sure they are rock hard and not squishy
>
> good luck!
> Jamie
>
> ----- Original Message ----- From: "Avocado Tom Tarka"
>
> Jamie,
>
> I think you were close with this, but I believe it was actually a bad 
> helicoil someone put in the #3 spark plug hole: as soon as it got hot enough, 
> it would lose compression and power.
>
> Helicoil came out when I was trying to do another hot compression test.
>
>
> On Oct 31, 2015, at 4:18 PM, Jamie <jrivers at globalserve.net> wrote:
>
>>>> John Rogers  wrote:
>>>> 
>>>> I am still convinced until proven otherwise that this is a case of
>>>> pre-ignition. It has all the symptoms -- starts fine, runs OK until 
>>>> warm,
>>>> then loss of power.
>> 
>> 
>> my wild ass guess is ... dropped valve seat...... the seat is in place 
>> till the head warms up,, then starts to rattle around and cause all kinds 
>> of issues.
>> best way to find out.. use a VAC gauge on the manifold ... when you see 
>> that needle flicker ,, sigh,, you will know ..
>> you might  run some hose to the dash so you can watch it while driving , 
>> if it doesn't act up as soon as you put the gauge on.
>> 
>> 
>
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