Achtung - Das schweinhund baby benz thread

[Stretch]

There seems to be a bit out there on the interweb talking about black nitride coatings for valves - don't think an M102 has this though!

SuperTech Black Nitride Coated Exhaust Racing Valve-1GRFE

It is probably just more ming.

Here's a bit of information about valve condition which is quite a nice read

Exhaust Valve Leakage - a photo essey

[Simpler=Better]

If the motor is staying NA I would just make sure they're not warped and check the seats with machinist's blue.

Look up the packaging/ shipping requirements for international HAZMATs and I'll ship you a case of it. It's flammable, corrosive, and dangerous for skin/eye/lung contact. But it melts the paint away while you watch. A roll of paper towels and a half can had my motorcycle's tank down to bare metal.

[Stretch]

Originally Posted by Simpler=Better

If the motor is staying NA I would just make sure they're not warped and check the seats with machinist's blue.

Look up the packaging/ shipping requirements for international HAZMATs and I'll ship you a case of it. It's flammable, corrosive, and dangerous for skin/eye/lung contact. But it melts the paint away while you watch. A roll of paper towels and a half can had my motorcycle's tank down to bare metal.

Very kind offer - thanks. That sort of stuff would have to be sent surface for sure but that's not the real problem. Dutch customs would stop it from going through because as a private individual I'm not allowed to use it here. You need permits and mates in high places for that kind of stuff here...

[Stretch]

Originally Posted by Stretch

Oh nuts - it looks like I'll have to go and find that 3M adhesive remover.

Or should it be oven cleaner next???!!!!

I got it off - well most of it - and a bit more than I should 'ave...

...I used this =>



Victor Reinz gasket remover

(Found in the back of the shed)

[Stretch]

Rear exhaust hanger

[Mike D]

Originally Posted by Stretch

There seems to be a bit out there on the interweb talking about black nitride coatings for valves - don't think an M102 has this though!

SuperTech Black Nitride Coated Exhaust Racing Valve-1GRFE

It was the last line in the advert which caught your eye I bet.

I love their use of "when" instead of "if".

[Stretch]

Originally Posted by Mike D

It was the last line in the advert which caught your eye I bet.

I love their use of "when" instead of "if".

Yep there's no stopping those valves from hitting pistons - this thread is proof of that!

[Stretch]

^^^engine de-greaser - good stuff - recommended by the Queen and Prince Charles. So I guess we know now there's a lot of Mother and Son carriage cleaning action going on at Buck house - pimping one's ride...

[Stretch]

...all day cleaning...



Took out the front crankshaft seal and then assembled the oil pump



I'm using an assembly lube - yellow spots of oil in picture - to make sure there's enough lubrication for the first start after this work



^^^ gasket for oil suction sieve thingy that sits in the sump and a new O ring for the connection to the block

[Stretch]

After measuring the weights of the connecting rods, wrist pins, rings and pistons see above I managed to get the heavier piston set to be a little bit closer to the others. In the end the piston sets are within 4 grams of each other.



Not exactly what I was aiming for but I didn't want to remove any more metal from the underside of the piston or the sides of the conrod - I chickened out

###############

I'm using this assembly lube

Maintenance & Preparation | Assembly Lubricant | ASSEMBLY LUBRICANT

As it is pretty gunky stuff I haven't splashed it about like you might with normal engine oil. The rings got lubed prior to fitting.

Making sure the gaps in the rings are equi-distant



Fitting the piston in the ring compressor



Pushing the piston into the cylinder - make sure the conrod doesn't smack into the crank journal



ye olde hammer handle...



Make sure they're in the right way!

[Stretch]

Progress stalled - need some loctite 573 to seal the front timing chain cover...

[Stretch]

Originally Posted by Stretch

Progress stalled - need some loctite 573 to seal the front timing chain cover...

I should have done some forum reading before packing up the tools for the day =>

Front cover sealant

I have some loctite blue RTV that's good to 250 degrees C

That will be used tomorrow.

[Zulfiqar]

If Im not mistaken the oil scraper ring gaps are on the thrust side of the piston, I was always taught that you arrange the gaps as such that no gaps should be on the thrust side of the piston.

[pwogaman]

Originally Posted by Stretch

^^^engine de-greaser - good stuff - recommended by the Queen and Prince Charles. So I guess we know now there's a lot of Mother and Son carriage cleaning action going on at Buck house - pimping one's ride...

LOL

[Stretch]

Originally Posted by Zulfiqar

If Im not mistaken the oil scraper ring gaps are on the thrust side of the piston, I was always taught that you arrange the gaps as such that no gaps should be on the thrust side of the piston.

To be honest that's the first time I've heard that. But I'm no engine building expert. The FSM doesn't mention it - just says to make sure the gaps are evenly spaced...

...tortuous route etc...

Piston ring - Wikipedia, the free encyclopedia

I can see why you'd want to do that trick you mention though it could help by not digging the ends of a piston ring into the cylinder wall on the power stroke if they happen to be a bit sharp on the corners. In the long run, however, it is possible that the rings will rotate - they won't necessarily stay in the same position as they were fitted.