Hi Mike
Just got to this, looked and couldn't see any replies, on the six 1+6 are at
tdc, then 2+5 120 deg later then 3+4 120 deg after that, if you stick to
looking at the rockers for the pair on the rock, the cylinder the same
distance from the middle of the engine i.e. the division between 3 and 4
will be the one to test. I find that the easiest way to look at the thing is
like having a mirror in the middle of the engine, treat the valve or the
cylinder that is where the reflection should be!
Graham,
1967 1300 FWD
1968 2000 Saloon
1972 2.5PI Saloon
1974 Sprinted Dolomite 1850
1975 Toledo in restoration!
http://www.triumph-iw.co.uk
http://www.mickdolphin.co.uk Spares Supplier.
----- Original Message -----
From: "Mike Ross" <mikeross@Prodigy.net>
To: "spitfires@autox.team" <spitfires@autox.team.net>
Sent: Saturday, June 09, 2001 4:22 PM
Subject: Fw: How to find "top dead center"?
| > Thanks Mark,
| >
| > I really appreciate the time you took to thoroughly explain the leat
| down test.
| > Am I to assume that with the GT6 the # 1, 3, and 5 pistons are at
| TDC
| > at the same time when the TDC mark on the crank pulley lines up with
| > the pointer, and the #2, 4, and 6 pistons at TDC when the mark is
| 180
| > degrees from the pointer? Also is it the two valves on the number
| > three cylinder that are to be 'on the rock' when the # 1 and # 5
| > pistons are at TDC? Couldn't I also just use the closed intake and
| > exhaust valves of the cylinder I'm testing as a guide to when that
| > piston is at TDC?
| >
| > I saw this done on the TV show "Crank and Chrome" but they didn't go
| > into enough detail for novices like me. They implied that with the
| > piston at TDC the pressure wouldn't move the piston down. I'm glad
| > you cautioned me on this.
| >
| > thanks again,
| >
| > Mike http://pages.prodigy.net/mikeross
| > '63 Spitfire
| > '66 Spitfire
| > '68 Spitfire (donor body tub for GT6 convertible)
| > '69 GT6+ (donor chassis for GT6 convertible)
| > '70 GT6+
| >
| > ----- Original Message -----
| > From: "Mark J Bradakis" | > Subject: Re: How to find "top dead center"?
| >
| >
| > > Oh oh, this could take a while. I'll try to be brief. In truth,
| > the answer
| > > to your question is quite simple. The number one piston is at TDC
| > when the
| > > TDC mark on the crank pulley lines up with the pointer. So is the
| > number
| > > four piston. And 180 degrees of crankshaft revolution will put
| > number two
| > > and three at TDC.
| > > mjb.
|
|
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