Can't Start HPI Savage Truck

[Jerry Houlihan]

Just got a used Savages SS Truck and I'm having trouble starting it.

I've verified that fuel is getting to the carb. Glow plug is good.
I am concerned that there is almost no engine compression noise when I turn
the engine over. I have verified that the piston is moving up and down but
there does not seems to be compression. Is it possible to blow out some
gasket by turning the engine over too much or too fast?

Any suggestions appreciated.

[Nascar24Rulz]

check to make sure that the cylinder head screws are tight? also, does it seem
like its "slipping" while trying to start....like having compression when it
wants too? to verify that you have compression, turn the flywheel by hand. if
you have it turning by hand, and it does slip while trying to start, it could
be the one way bearing in the rotostart system

[Frater Mus]

On Sat, 11 Dec 2004 at 23:38 GMT, <houlihanpublic@mindspring.com> wrote:

> I've verified that fuel is getting to the carb. Glow plug is good.
> I am concerned that there is almost no engine compression noise when I turn
> the engine over. I have verified that the piston is moving up and down but
> there does not seems to be compression.

What you're feeling (or not feeling) there is "pinch", the interference
fit between the cold piston and sleeve.

The pinch on a cold engine does not necessarily predict compression
on a warm engine. The upper part of the block/sleeve expands when the
engine gets up to temp and *then* the piston/sleeve fit is one of the
contributors to compression.

You'd test compression on a running temp engine with a compression gauge.

> Is it possible to blow out some
> gasket

Yes, a gasket can go south, but that's rarely a contributor to lost
compression. More likely candidates would be:

* loose head bolts
* physical damage to the piston, block, or head
* loose or defective GP
* " " exhaust

> by turning the engine over too much

It is a Bad Thing to continually crank over a cold engine. The pinch
you feel (or not feel) is an interference fit and the piston and
sleeve are wearing against each other until the engine heats up.

You can warm up the head with a blow drier to ease this wear while
you're fighting a tough start.

> or too fast?

Well, if you rev the engine too fast it might cause something like
piston damage which could hose compression. Or stretch/break a
conrod, etc.

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[BBA]

Answers inline



"Jerry Houlihan" <houlihanpublic@mindspring.com> wrote in message
news:Xns95BCB3896AFA6houlihanpublicmindsp@207.69.1 89.191...

> Just got a used Savages SS Truck and I'm having trouble starting it.
>
> I've verified that fuel is getting to the carb. Glow plug is good.



Are you sure the glow plug is in good condition?

A good glow plug will glow white!

A glow plug in poor condition will glow red!!!


> I am concerned that there is almost no engine compression noise when I turn
> the engine over. I have verified that the piston is moving up and down but
> there does not seems to be compression. Is it possible to blow out some



no compression!?



Use your thumb to turn the engine over

At (TDC) some point you should feel some restriction

Turn past restriction -- engine should pop.



If you feel no restriction and or no pop -- replace the engine!


> gasket by turning the engine over too much or too fast?



Not a chance


> Any suggestions appreciated.
>



--
BBA



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