Mark,
Funny, when I had a problem about 5 years ago (gas filling the crankcase), I
went the other way. My guess is that the valve doesn't really matter, if it
is functioning as designed.
Go ahead and run the car with the mismatch. It will be fine.
Good luck,
Peter
'68 TR250
on 3/15/03 7:27 PM, mbullard at mbullard@hawaii.rr.com wrote:
> Thanks Peter,
>
> I think I am going to replace the "new" needle valve with the old grose
> valve as I did have this problem before. I could place the Hylomar on the
> screw but my thought is that this has always been this way and the gas
> shouldn't be getting so high as to leak out from there in the first place?
> Correct?
>
> Is there any issue with running one needle valve and one grose while I wait
> for the new one?
>
> Thanks,
>
> Mark
>
>> On Sat, 15 Mar 2003 19:04:35 -0500 Peter Macholdt <vze2846b@verizon.net>
> wrote.
>> Mark,
>>
>> I too have a leak in or near the cold start valve (mine is small).
>>
>> It would help to know if your leak is occurring with the car off, or when
> it
>> is running.
>>
>> If it is doing it with the car off, then it must be a float/ jet problem as
>> the gas should not get as high as the cold start valve. I currently have my
>> carbs on the bench and notice that the lower screw goes all the way into
> the
>> gas chamber. It could be that you are getting some leakage here. It might
>> pay to put a dab of Hylomar on the screw threads before replacing this
>> screw.
>>
>> If the leak only occurs with the engine running, then I'd suspect that the
>> cold start valve is not properly seating on the surface of the carb. A
>> lister observed that he moved his leak by swapping the valves front to
> back,
>> indicating it had something to do with the function of that particular
>> valve.
>>
>> My remedy was to disassemble the valve and use valve grinding compound to
>> lap the valve to the carb body. It took a bit of lapping to get the
> surfaces
>> to mate properly, so I'm hopeful that this solves my problem. Be sure to
>> wash the carb and valve well so none of the grit gets into the motor.
>>
>> Good luck,
>> Peter
>> '68 TR250
>>
>>
>>
>>
>>
>> on 3/15/03 4:00 AM, mbullard at mbullard@hawaii.rr.com wrote:
>>
>>> I was told by a TR6'er over here that part of my carb problems may be the
>>> fact that I am using gross jets instead of the original needle jets.
>>>
>>> Okay I bought. I ordered and received today two new needle jets which I
>>> immediately placed in the carbs.
>>>
>>> Problem is now one of my carbs seems to be leaking from the lower screw
> hole
>>> of the cold start valve??? I can't really figure out why the screw hole
>>> would go all the way into the carb and allow gas to escape though it?
>>>
>>> The floats are set at 16mm at the highest point as suggested on the
> buckeye
>>> site but I'm assuming that too much gas is getting into the float bowl.
>>>
>>> Any suggestions?
>>>
>>> Thanks,
>>>
>>> Mark Bullard
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