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Newly rebuilt engine smokin'
chrsgrain - 13/8/07 at 05:14 PM

Hi all,

how long should a newly rebuilt engine (red top if it matters) smoke for? Been running for about 10 minutes in total and is still smoking white - when should I get worried??

Chris


DIY Si - 13/8/07 at 05:21 PM

Are you sure the timing's right? I had this once on an A series, and a slight tweek of the dizzy sorted it all out.


speedyxjs - 13/8/07 at 05:38 PM

Run fuel system cleaner through. Its available from halfrauds


Fatgadget - 13/8/07 at 05:47 PM

Ummm white smoke? Doesnt that usualy indicate steam?


scottc - 13/8/07 at 05:52 PM

When I rebuilt the 924 engine, well top of the engine, It smoked for about 30 minutes. I didn't think it would ever stop. But it did.

I even went as far as making sure there was no water i the exhaust.

I assume you're not losing water?


chrsgrain - 13/8/07 at 05:57 PM

No water loss - the 30 minutes sounds good, need to run it for another 20 at least then!

The run to SVA will take about an hour, so that should sort it out - if we go, ridiculous weather tomorrow means might have to give it a miss..

CHris


andyharding - 13/8/07 at 06:50 PM

You only have 10 mins on the engine and are going to drive an hour to SVA? You are a brave man!

I put 100 miles on the clock before my SVA to make sure nothing was going to fall off. All on private roads of course


dave r - 13/8/07 at 08:38 PM

mine did nearly 2 hours to sva, with no real running prior to that...

i did have a backup vehicle following me though with a trailer!!

dave


whitestu - 13/8/07 at 08:50 PM

My first drive was to its SVA. Not very far but it was round the North Circular at 08:00.

No back up.

Stu

[Edited on 13/8/07 by whitestu]


02GF74 - 14/8/07 at 06:06 AM

find out what the smoke is.

get a glassd of very cold water and place it at the exhaust; the smoke should condense and then you can smell it to narrow down what it can be:

petrol, water or oil.

leave the engine on idle for 20 or more minutes until it has fully warmed up and the stuff should disappear - hopefully it is just crud in the exhasut burning off.

check your oil and water levels afterwards.

don't worry about driving to SVA - I did a few pratise runs on the private roads near my house, nothing major - just to test the brakes.


NS Dev - 14/8/07 at 11:41 AM

Don't worry chris, my XE's always steam for a good while.

Run it until the fan kicks in, if its still steaming then its more of a worry.


NS Dev - 14/8/07 at 11:44 AM

quote:
Originally posted by andyharding
You only have 10 mins on the engine and are going to drive an hour to SVA? You are a brave man!

I put 100 miles on the clock before my SVA to make sure nothing was going to fall off. All on private roads of course


mine ran about 10 mins before sva and about 2 miles!


chrsgrain - 14/8/07 at 12:21 PM

Cheers for that Nat.... will have more time to let it run preSVA as the alternator packed up and had to be changed - meant I missed the test though

Chris


thomas4age - 15/8/07 at 05:20 AM

smoking doesn't usually stop before the engine is completly warmed up about 20 min idle or 10 minutes drving around town, after I've replaced a headgasket.

don't strees the engine for the first few runs though otherwise the gasket will go pop again, learned that the hard way!

grtz Thomas

[Edited on 15/8/07 by thomas4age]