[TR] Have I blown a gasket?

[Bud R]

White is bad.

Best to have a shop do the leakdown test and have them include the  
cost of it in the repair of a head gasket if needed, which it sounds  
like IS needed.


Bud

Extreme Parts Racing (more than just a haircut)

71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK III (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)











On May 8, 2014, at 2:09 PM, Lee&John Howard wrote:

> Thank you Geo and Bud and Phil
>
> I have to ask - how do I do a leak-down test?
>
> The exhaust is definitely white. No droplets there, as far as I can  
> tell.
>
> John
>
>
> On Thu, May 8, 2014 at 12:39 PM, Bud R <levilevi at comcast.net> wrote:
> Sounds like you've been basically running on two and the occasional  
> 3, maybe 4. You didn't mention how it ran before you started your  
> testing.
>
> Sounds like a head gasket  could be blown, but you might have an  
> intake manifold leak too that could mess with the carbs, foul the  
> plugs, gum up the valves, and affect the compression or all of the  
> above also.
>
> You can always try re- torquing the head and seeing if that helps,  
> but since you have to take the rockers off anyhow you might as well  
> do a new head gasket if it points to that. What color is the  
> exhaust? Ask whoever might have been following you on the run if  
> they noticed any colors from your tailpipe?
>
>
> Bud Rolofson
>
> Extreme Parts Racing (more than just a haircut)
>
> 71TR6 CC57365 (Good 6)
> 71 Spitfire MK IV Race Car #3
> 69 Spitfire MK III (back up FE engine/dinghy car)
> 93 Minnie Winnie Race Support Vehicle
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
>
>
>
>
>
>
>
>
>
>
> On May 8, 2014, at 12:53 PM, Lee&John Howard wrote:
>
>> Hello list:
>>
>> Following a club run last weekend, I did some basic testing on the  
>> TR4.
>> Found that plugs #1 and #2  were fouled, especially #2, which had  
>> an oil
>> drip on its tip. Proceeded to check the compression : 110 on #1 &  
>> 2; 156 on
>> #3&4.  Then I remembered something peculiar at the Webers. The  
>> front carb ,
>> feeding the front cylinders, has for a while not seemed fully  
>> effective;
>> eg, you can't choke off engine by blocking one or both throats,  
>> whereas
>> choking either of the rear throats will stall the engine. Finally,  
>> I do
>> have to top off the radiator more than would seem usual, with no  
>> leakage
>> apparent.
>>
>> So - Have I blown the gasket? Or perhaps it wasn't seated properly  
>> in the
>> first place. I reassembled this engine some 5 years ago, so  
>> anything is
>> possible. Compression readings four years ago were 135, 130, 130, 135
>> (cold) - close enough. The readings above were done on a warm  
>> engine and
>> were the same wet and dry.
>>
>> Your thoughts?  And thanks, as always.
>>
>> John Howard
>>
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>>
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