Showing posts with label Crankshaft. Show all posts
Showing posts with label Crankshaft. Show all posts

Sunday, April 7, 2013

Engine rebuild pt3...

Replacement con rod cap bolts arrived Saturday morning - so I cleaned and oiled up all the bits and refitted pistons 1 and 4 with new bolts and torqued them up to
45 Ibs ft without any problems.

Fitting two of the cylinder head bolts into block as guilds, cleaned the surfaces and fitted the head gasket and head - tightening the nuts and bolts in the correct order.

After positioning the crank back to TDC on 1 and 4, I started fitting the timing chain and gear assembly. I will refit the original chain tensioner and check to see if it needs replacing.

3hrs


Monday, April 1, 2013

Engine rebuild pt2...

Oh the joys of restoration - crankshaft caps bolts torqued to 65 Ibs ft and then the big end caps - tighten them by hand first and with the torqued wench to 45 Ibs ft. Pistons 2 and 3 were fine but a couple of nuts on 1 and 4 didn't seem to be getting there.

I undone both to see if the treads were stripping but both looked ok, so started again and snap! With one bolt broken and the other with a hairline fracture - new nuts and bolts to order.

So with that setback and my finger getting colder, I continued with fitting the jackshaft in to the block and camshaft to the head.

3hrs



Saturday, March 30, 2013

Engine rebuild pt1...

With a clean cloth and some degrease solution I gave the block a good wipe down, removed any over-paint from the flanges.

Using STP oil I coated the big end shells and dropped the crank in to place, next the thrust washers again giving everything a good coat of oil. On with end caps and hand tighten at this point.

Checking the end-float of the crank came in just over half way between of the recommended tolerance.

Next the pistons, checking the ring gaps where at 180 deg to each other, I used a ring clamp to compress them and trapped the first one in. Again covering the small end shells with oil and hand tighten them - after each piston was attached I used the crank pulley to help rotated the crank.

STP oil is very sticky stuff and crank is fairly stiff to rotate - it's also very cold today and trying to snow again!

4.5 hrs











Saturday, February 2, 2013

Engine breakdown... pt16 Completed!

Yes the final bit done - removing the crank from the block. Just four bolts on the front and rear main bearing caps holding it in place.

The crank looks ok, the big ends and main bearing surfaces are marked/stained from the sitting in the oil for so long, but I'm fitting new shells and this time I'm going to us a 20W/50 mineral oil for the first 500 miles of running in.

I then gave the block a good clean/degrease in preparation for a coat of black paint and the rebuild!

3 hrs














Tuesday, January 29, 2013

Engine breakdown... pt14

Clutch and Flywheel - repositioning the engine on the flat surface of the trolley I removed the six bolts holding the clutch cover and pulled out the plate, I think its about half worn so I will replace it anyway.

Then the eight bolts holding the flywheel to the crankshaft, using a large screw driver in the starter ring to stop it turning I lifted it away.

1hr








Tuesday, January 8, 2013

Engine breakdown... pt8

A quick first look at the crankshaft, it has some surfaces rust. The last time I looked in here the thrust washers had dropped out and the crank and block was badly chewed up.

This replacement block and crank looks ok, but I will need to check the end float and probably renew the thrust washers while its stripped.

30 mins