Mk1 Pi engine rebuild

Show us the work you're doing on your Triumph 2000/2500/2.5.
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M5driver
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Re: Mk1 Pi engine rebuild

#11 Post by M5driver » Fri Mar 15, 2019 4:40 pm

Pictures
They keep disappearing!!!!!!!
The attachment P1030289.JPG is no longer available
P1030289.JPG
Chris Lennard Mem 1906
Triumph 2.5pi MK1 1969 Damson, tan interior
TRiumph 2.5pi MKII 1972 Mallard, black interior
BMW E34 M5 LE 47/50 Orinoco Green
VW Golf mk6 Bluemotion Black

Carboy0
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Re: Mk1 Pi engine rebuild

#12 Post by Carboy0 » Fri Mar 15, 2019 7:57 pm

Are they valve spring collets, or part of the Oil pump?
Chris

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Saffron 2000 TC Man O/D - bit of a project.
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johnnydog
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Re: Mk1 Pi engine rebuild

#13 Post by johnnydog » Fri Mar 15, 2019 9:17 pm

You'd be surprised what you find in the sump. When I put a magnetic drain plug in the sump of my S, at the next oil change, attached to the drain plug was a tapered cross head machine screw like the one located in the pedestal of the rocker shaft. Fortunately, when I removed the rocker cover, there was still one there. I can only assume that the one in the sump had been there since manufacture. Can't think of any other way it got there!
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1967 Mk1 2000 in Gunmetal Grey
1969 Mk1 2000 in Royal Blue
1970 Mk2 2000 in Valencia Blue
1972 Mk2 2.5 PI in Triumph White
1973 Mk2 2.5 PI in Sienna Brown
1976 Mk2 2500S in Carmine Red

M5driver
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Re: Mk1 Pi engine rebuild

#14 Post by M5driver » Sun Mar 17, 2019 6:03 pm

Well looking at the offending item it appears to be made of alloy where it came from don't know. The oil pump is intact if a little worn, the rotors being out of tolerance. I expected this the oil pressure was low when hot.
The attachment P1030292.JPG is no longer available
P1030292.JPG
The Pistons and rods are now out at some point a little dirt got to the bearings and all of the crank journals for the rods are slightly scored so a regrind looks like its on the cards. The mains look ok so far I sill have three to uncover.
Also removed is the front sealing block. I have a stainless replacement to go in from Jigsaw racing. The front engine plate removes as well. Crank end float was checked and just over tolerance so new thrusts should suffice. The piston rings are very worn no wonder oil consumption was on the high side, the oil control rings being particularly bad. So the shopping list has grown and the predicted machining costs have gone up. Back to work tomorrow so progress will come to a halt for a while.
Chris Lennard Mem 1906
Triumph 2.5pi MK1 1969 Damson, tan interior
TRiumph 2.5pi MKII 1972 Mallard, black interior
BMW E34 M5 LE 47/50 Orinoco Green
VW Golf mk6 Bluemotion Black

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