tearing down "field motor"
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tearing down "field motor"
In an attempt to learn more, I picked up a cheap motor from a restorer - motor was 99% complete - but has been sitting outside (in a typical Canadian environment) under a tarp for years .... so many bits will go into garbage, some hopefully fixable / rebuild-able (carb., disti., generator etc)
Have been able to tear it down to the "longblock" without any major trauma (except to rusted tin) - aside from a few tin bolts that seized in the case and sheared off.
Anyway, I have removed the nuts (and consequently a few studs) that attached the heads to the case / cylinders ... but they will not budge. It seems the inner, upper studs are seized to the heads ... all other 6 seem to have some wiggle.
Any tips to get the heads off the cylinders? I am not sure they are salvageable - but do not want to mess things up - and there are no good leverageable spots that will not bend cooling fins.
Any other tips to tear this down and beyond? My goal is to make this run for cheap - on a bench - not in a vehicle. If I can do that, later on I'll build a motor up with new, delicious parts ... maybe ... or just be happy with the education.
Have been able to tear it down to the "longblock" without any major trauma (except to rusted tin) - aside from a few tin bolts that seized in the case and sheared off.
Anyway, I have removed the nuts (and consequently a few studs) that attached the heads to the case / cylinders ... but they will not budge. It seems the inner, upper studs are seized to the heads ... all other 6 seem to have some wiggle.
Any tips to get the heads off the cylinders? I am not sure they are salvageable - but do not want to mess things up - and there are no good leverageable spots that will not bend cooling fins.
Any other tips to tear this down and beyond? My goal is to make this run for cheap - on a bench - not in a vehicle. If I can do that, later on I'll build a motor up with new, delicious parts ... maybe ... or just be happy with the education.
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
- Amskeptic
- IAC "Help Desk"
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Re: tearing down "field motor"
Spray PB Blaster rust penetrant on the studs and the joints between the heads and the cylinder barrels, and wait for a day, do it again, hit the studs with nuts installed flush with the ends of the studs and tap tap tap. Put hammer handle or broomstick in intake ports and exhaust ports and try to pry or hammer.slow.bus wrote:I have removed the nuts (and consequently a few studs) that attached the heads to the case / cylinders ... but they will not budge. It seems the inner, upper studs are seized to the heads ... all other 6 seem to have some wiggle.
Any tips to get the heads off the cylinders?
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
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Re: tearing down "field motor"
ahhh ... that makes sense ... I have some cutdown dowels / broom handles just for that ... never thought to use the ports. Been spraying and soaking for the last few nightsAmskeptic wrote: Put hammer handle or broomstick in intake ports and exhaust ports and try to pry or hammer.
Colin
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
- asiab3
- IAC Addict!
- Location: San Diego, CA
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Re: tearing down "field motor"
Would a cylinder stuck to the head benefit from a compression stroke (plugs installed) with the head nuts off to break the seal? Or am I guessing madly?
1969 bus, "Buddy."
145k miles with me.
322k miles on Earth.
145k miles with me.
322k miles on Earth.
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Re: tearing down "field motor"
engine is seized ... due to sitting (or so I was told) ... hopefully it is just the pistons seized to cylinder walls ... but time will tell if I have a rebuild-able motor or just an educational exercise on dissasembly
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
- wcfvw69
- Old School!
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Re: tearing down "field motor"
Get a rubber mallet and smack around the heads, being careful to not break any fins. Sometimes the blows will break the seal as well.
If there is a lot of thread on the studs going thru the heads and cylinders, you can try to double nut them and back them out of the case as well. It may free things up.
If there is a lot of thread on the studs going thru the heads and cylinders, you can try to double nut them and back them out of the case as well. It may free things up.
1970 Westfalia bus. Stock 1776 dual port type 1 engine. Restored German Solex 34-3. Restored 205Q distributor, restored to factory appearance engine.
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Re: tearing down "field motor"
Only combustion events would help . . .asiab3 wrote:Would a cylinder stuck to the head benefit from a compression stroke (plugs installed) with the head nuts off to break the seal? Or am I guessing madly?
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
- SlowLane
- IAC Addict!
- Location: Livermore, CA
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Re: tearing down "field motor"
Since you're in Canada, you have the much better option of using Lloyd's Moovit penetrant. Lordco carries it. Beats the pants off of PB Blaster.Amskeptic wrote:Spray PB Blaster rust penetrant on the studs and the joints between the heads and the cylinder barrels,slow.bus wrote:I have removed the nuts (and consequently a few studs) that attached the heads to the case / cylinders ... but they will not budge. It seems the inner, upper studs are seized to the heads ... all other 6 seem to have some wiggle.
Any tips to get the heads off the cylinders?
'81 Canadian Westfalia (2.0L, manual), now Californiated
"They say a little knowledge is a dangerous thing, but it is not one half so bad as a lot of ignorance."
- Terry Pratchett
"They say a little knowledge is a dangerous thing, but it is not one half so bad as a lot of ignorance."
- Terry Pratchett
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Re: tearing down "field motor"
Thank you for the tips - no success yet - but still trying each night.
Worried I may just need to crack the cylinders - which the guy I bought it from suggested - from a time / money point of view. This is primarily a learning exercise - so I am trying hard to not throw money at it ...
slowlane ... I de-californiated my 1981 vangon - so may have some spare bits if you are in need.
Worried I may just need to crack the cylinders - which the guy I bought it from suggested - from a time / money point of view. This is primarily a learning exercise - so I am trying hard to not throw money at it ...
slowlane ... I de-californiated my 1981 vangon - so may have some spare bits if you are in need.
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
- Bleyseng
- IAC Addict!
- Location: Seattle again
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Re: tearing down "field motor"
Put some PB down in the thru the spark plug holes and let it sit for a day. Try to turn the crank to break the rings free with a bar on the flywheel.
Geoff
77 Sage Green Westy- CS 2.0L-160,000 miles
70 Ghia vert, black, stock 1600SP,- 139,000 miles,
76 914 2.1L-Nepal Orange- 160,000+ miles
http://bleysengaway.blogspot.com/
77 Sage Green Westy- CS 2.0L-160,000 miles
70 Ghia vert, black, stock 1600SP,- 139,000 miles,
76 914 2.1L-Nepal Orange- 160,000+ miles
http://bleysengaway.blogspot.com/
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Re: tearing down "field motor"
Heads still will not budge - tried everything and more ...
Going to keep spraying them, but moving on to other things - rebuilt disti last night - will try carb, then generator ...
Going to keep spraying them, but moving on to other things - rebuilt disti last night - will try carb, then generator ...
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Re: tearing down "field motor"
Keep them doused with penetrant. Tap them to allow better infusion.slow.bus wrote:Heads still will not budge - tried everything and more ...
Going to keep spraying them, but moving on to other things - rebuilt disti last night - will try carb, then generator ...
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
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- I'm New!
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Re: tearing down "field motor"
Will do - I plan to douse them nightly all week - but not attempt to remove until next week at the earliest.
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
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Re: tearing down "field motor"
Been thinking about this differently ... has anyone tried or had success or feels strongly etc about trying to use some rust killing stuff ... Metal rescue ...por15, vinegar etc to try and eat away at the rust presumed to causing the issue ...
Internet shows this stuff magically unsticking carbs, bolts, nuts, linkages, lost treasures and restoring ones faith in politicians and VW CEO's ....
Internet shows this stuff magically unsticking carbs, bolts, nuts, linkages, lost treasures and restoring ones faith in politicians and VW CEO's ....
1981 Westfalia
Dents & Dings, but no Rust
Dents & Dings, but no Rust
- wcfvw69
- Old School!
- Status: Offline
Re: tearing down "field motor"
Have you gotten the heads off yet? I've never failed to knock the heads loose with an overnight PB blaster soak and some nice blows with a rubber mallet in key places w/out breaking them. Now, the cylinders? Yup, I've had some that refused to break free no matter what I tried before getting aggressive with a steel hammer and shattering them.slow.bus wrote:Been thinking about this differently ... has anyone tried or had success or feels strongly etc about trying to use some rust killing stuff ... Metal rescue ...por15, vinegar etc to try and eat away at the rust presumed to causing the issue ...
Internet shows this stuff magically unsticking carbs, bolts, nuts, linkages, lost treasures and restoring ones faith in politicians and VW CEO's ....
1970 Westfalia bus. Stock 1776 dual port type 1 engine. Restored German Solex 34-3. Restored 205Q distributor, restored to factory appearance engine.