HELP PLEASE? - Red Hot Turbo after gentle 20km drive in my X19
New engine now blown head gasket after 900km of gentle running in.
BACKGROUND- Turbo was glowing red hot - have reduced this by correctly plumbing the turbo vac hose from the PLENUM to the Ignition ECU, not directly from the turbo (ie it now measures pressure from the other side of the butterfly valve). Then 24hrs later the head gasket blew = undrivably rough running and surge tank full of bubbles and foam.
TIMING PUZZLE
The distributor has only the rotor button in it.
THE MANUAL:- Says when fitting the distributor you are to set no.4 cylinder to TDC and then align the rotor button via a mark on the dizzy to no.4 terminal and tighten bolts THATS IT. It says it has nothing to do with adjusting ignition timing and that timing is handled by the ECU.
Crank Angle Sensor
THE MANUAL - Says that you align the crank angle sensor so its "built in" TDC pointer correctly aligns the crank marker at TDC. BUT elsewhere it specifies that the static engine timing must be checked - with turbo Vac hose disconnected - and is to be set at 8 - 12 deg BTDC at 900 RPM. BUT
It does not specify where the adjustment for this is to be found. However the crank angle sensor is held in place by two M6 bolts and the holes in the mounting plate are elongated - Surely for the purpose of adjustment.
NOW when I checked for TDC while assembling the engine I found that it was out by around 3mm, (I thoroughly marked its position before I moved it) . . . and that's 3mm anticlockwise . . .and the engine rotates the other way . . . i.e. it was 3mm BTDC.
By putting 2 & 2 together - - in the Factory they had moved the crank angle sensor so that it gave correct ignition timing, (8 - 12 deg BTDC at 900 RPM) and therefore only approximated TDC - hence I found it to be 3mm out.
Does anybody know if my conclusion above is correct? Is this the correct way to set the timing os is there some other adjuster in the Mk. Uno Turbo engine??
New engine now blown head gasket after 900km of gentle running in.
BACKGROUND- Turbo was glowing red hot - have reduced this by correctly plumbing the turbo vac hose from the PLENUM to the Ignition ECU, not directly from the turbo (ie it now measures pressure from the other side of the butterfly valve). Then 24hrs later the head gasket blew = undrivably rough running and surge tank full of bubbles and foam.
TIMING PUZZLE
The distributor has only the rotor button in it.
THE MANUAL:- Says when fitting the distributor you are to set no.4 cylinder to TDC and then align the rotor button via a mark on the dizzy to no.4 terminal and tighten bolts THATS IT. It says it has nothing to do with adjusting ignition timing and that timing is handled by the ECU.
Crank Angle Sensor
THE MANUAL - Says that you align the crank angle sensor so its "built in" TDC pointer correctly aligns the crank marker at TDC. BUT elsewhere it specifies that the static engine timing must be checked - with turbo Vac hose disconnected - and is to be set at 8 - 12 deg BTDC at 900 RPM. BUT
It does not specify where the adjustment for this is to be found. However the crank angle sensor is held in place by two M6 bolts and the holes in the mounting plate are elongated - Surely for the purpose of adjustment.
NOW when I checked for TDC while assembling the engine I found that it was out by around 3mm, (I thoroughly marked its position before I moved it) . . . and that's 3mm anticlockwise . . .and the engine rotates the other way . . . i.e. it was 3mm BTDC.
By putting 2 & 2 together - - in the Factory they had moved the crank angle sensor so that it gave correct ignition timing, (8 - 12 deg BTDC at 900 RPM) and therefore only approximated TDC - hence I found it to be 3mm out.
Does anybody know if my conclusion above is correct? Is this the correct way to set the timing os is there some other adjuster in the Mk. Uno Turbo engine??