Compression testing the engine

[leemarkadams]

Hello, hoping to start looking for a Tuscan in the near future, and was wondering what is the easiest method to perform a compression test on the Speed 6 engine, as would want to perform that as part of any checks I do?

Many thanks

Lee

[GreenV8S]

Why would it be different to any other engine?

[andyoleary]

Leak-down test would tell you more I think,

Andy

[leemarkadams]

I am just checking there are not any particular 'foibles' with doing a test on a SP6.

So if the same as anormal engine then easy day!

[Jim Green]

Disconnect the fuel pump before you do the compression test, otherwise the unburned fuel will contaminate your cats.

[NTEL]

Also the spark plugs arn't the easiest things to get to. I certainly would not let just anyone take a stanley knife to my spark plug cover and then trust them to seal it back up properly.

[Whitey]

this is when the carbon fibre cam cover comes in handy, and you realise where all your cash goes on a service. Getting off all the old silicon!!

[andyoleary]

Whitey - do the CF covers have a seal at the two little "fingers" where you would normally have to cake a load of sealant to close it off? How about where the leads enter near the #6 end - is that just open as normal?

Cheers

Andy

[zooooom]

Andy I have the above pictured carbon fibre spark plug cover fitted to my car.
If you want to have a closer look let me know ?

andyoleary said:

Whitey - do the CF covers have a seal at the two little "fingers" where you would normally have to cake a load of sealant to close it off? How about where the leads enter near the #6 end - is that just open as normal?

Cheers

Andy

[Whitey]

Andy, the underneath of the carbon fibre insert is covered in a neoprene (I think) spongy type material, so the little finger bits and the back end are sealed via this. It all seems to seal very well, but you need to ensure you get all the old silicon off which is a pain of a job, and takes ages as a lot of it really needs to be done by using your fingers!

I have not had an issue with water ingress since fitting about a year ago, and drove through some serious heavy rain at length in France in the summer and parked up in the same with no issues at all.

Oh and I think it's a weight savings of either 700grams or 1kg cannot remember which!

Cheers
Whitey

[andyoleary]

Cheers mate, I think I need to invest in one of these. The weight saving alone must be worth it!

Ta

Andy

[rev-erend]

If I was selling a car - I would not want just anyone doing a compression test.

Taking it to a garage for a report would be OK as you know that

1) It would be done properly

2) The person buying is genuine .. as it's costing them.

[leemarkadams]

Fair point I suppose, i was just thinking out loud that is all!