Suffolk A114 spruce up

17 posts / 0 new
Last post
Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Suffolk A114 spruce up

Stared a spruce up of an A114 Suffolk Punch engine.

The whole carb including the float bowl had been painted in some black goo which mercifully came off with a nylon brush and thinners. Then a strip & thorough ultrasonic clean and airline.

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Top end is a bit of a mess,

Top end is a bit of a mess, lot of very hard coked up stuff to remove.

Very boring but pleased with the finish

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Lapped the valves a bit which

Lapped the valves a bit which have come out ok and in spec.

 

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Valve cover was a rusty mess,

Valve cover was a rusty mess, so polished it up and finished wth engine lacquer - no I don't know why I bothered either :-)

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Moved onto the cylinder head

Moved onto the cylinder head cover now which also has heavy coked deposit, but my biggest issue has been removing the gasket, which did come off in one piece still attached to the head cover but will not come off no matter what I have tried so far, I have soaked the whole head cover is a bucket of diesel for 3 days and its zero difference. It is rock hard. 

I have been able to take off tiny shavings with super judicious use of a v sharp wood chisel, but its taking ages and dangerous if I slip or dig through to the ali surface. I am currently boiling the head cover in a pan of water which has been on low simmer for an hour or so and will see if that has made any effect. I have a new gasket and note they are thick (2mm) 

I've never come across a gasket this stuck solid. Any other tips?

wristpin
wristpin's picture
Offline
Last seen: 3 hours 20 min ago
Joined: 23/05/2012 - 22:09
Loctite (I think) used to do

Loctite (I think) used to do an aerosol of gasket remover which was reasonably effective but I've also heard of people using Poly something wall paper releaser. 

Roloc disks are pretty effective but can be a bit harsh and I did read somewhere to be aware that they leave abrasive residue.

https://www.zoro.co.uk/shop/abrasives/surface-conditioning-products/1539...

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Good tips and have got me

Good tips and have got me thinking.. the Roloc disks are a good idea, I usually use scotch bright by hand but will have to get some of those for general buffing. Even hand held scotch bright pads leave residue fibres, its how you clean up which is important.

I stated looking just now at the active ingredients of gasket and paper strippers like Locktight and it appears at 50% mix with water that vinegar and or fabric softener are erstwhile replacements.

I really want to give this a crack tomorrow as am away all next week, other wise I would have ordered the locktight aerosol which has decent reviews. Will report back on the effectiveness of vinegar / fabric softener which isi supposed to break down the bonds. The simmering pan has had a marked effect also btw and it is starting to soften, never known a gasket like it, I think the diesel soak was counter productive, too thick and sticky to penetrate.

Given my other half would be horrified if I was simmering a lawnmower head in the kitchen I am doing it in the workshop with a camping stove. My first uncontrolled fire in there ever which given gas / mig welding and other nonsense I get up to is amazing in it self. Did not close the valve properly on the butane bottle and by the time I hit the stove ignition there was a nice fire ball - had me running round putting things out for a bit :-)

 

wristpin
wristpin's picture
Offline
Last seen: 3 hours 20 min ago
Joined: 23/05/2012 - 22:09
Given my other half would be

Given my other half would be horrified if I was simmering a lawnmower head in the kitchen

Not in the dishwasher then?

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Dishwasher? whats one of

Dishwasher? whats one of those haha - I'm lucky if the heating comes before Christmas let alone a dishwasher :-)

I don't know if the fabric softener and vinegar mix made a big difference but the cycles of simmering, plastic scraper and finishing with scotch bright got it all off eventually. 

Next flat plate with 600,800,1200 +paraffin and I think that will do. Making a valve chest cover blank plate off next, then start thinking how I will strip the existing finish.

Got a lot to do before I put the motor together but I see the A98 head bolt torque figure is 17, seems high compared to the F15 but  I guess the A114 is the same at 17?

 

 

 

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
I have had it with my

I have had it with my enormous draper valve spring compressor, just about managed the sloper valve refit with it, but its just way to big for mowers really and really struggling with these Suffolk valves.

Would appreciate recommendations on where to source an erstwhile / generalist mower type. Have seen this one below, seems pricey but do I just need to bte the bullet? or are there better cheaper sources?

Cheers Chris

https://www.ebay.co.uk/itm/Valve-Spring-Compressor-For-Briggs-Stratton-1...

 

NM
Offline
Last seen: 1 day 18 hours ago
Joined: 31/05/2018 - 15:09
Hi Chris, I used this type on

Hi Chris, I used this type on my Marquis, mainly because I already had it, although the retainers were a slightly loose fit and the arms could do with being a little longer it did the trick. Could make an insert out of a washer. I’d have thought if you can make a flywheel puller you could make one of these.

Nick

hillsider
hillsider's picture
Offline
Last seen: 57 min ago
Joined: 06/06/2010 - 20:42
Try this as an alternative

Try this as an alternative supplier, definitely a more agreeable price.

I have used one for many years and if used correctly works fine, the build quality is good also.

http://www.briggsbits.co.uk/acatalog/19063-Valve-Spring-Compressor--787....

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Hi Nick, I hadn't thought of

Hi Nick, I hadn't thought of making one, but you have me thinking...Like your Record looking Longbro!

Just my opinion, but the overhead clamp type are all well for compressing to remove, but not so workable when you want to present the compressed spring with cup / retainer / what have you back into the chest to put the pin or circlip onto the valve stem. I am going to modify / slim down the big draper for easier removal as it will work better for that, also the wing nut bolt is poor and to weedy so will tap a larger wing nut in that. I will get the model Hillsider has pointed out, I think those are much better at presenting the compressed setup into the chest.

Hillsider, many thanks for that, looks ideal and best price of any I have seen!

 

 

hillsider
hillsider's picture
Offline
Last seen: 57 min ago
Joined: 06/06/2010 - 20:42
No problem for reference, it

No problem for reference, it is a Briggs and Stratton service tool that has been around for a long time so should be ok. The jaws on both arms are adjustable to help with supporting the springs and cups while installing them. 

Regarding the cost my understanding is that official B&S dealers are required to follow the pricing structure set bŷ B&S so you should find the cost similar at other dealers, obviously not the case with some internet based suppliers.

hortimech
Offline
Last seen: 1 day 42 min ago
Joined: 08/04/2013 - 17:02
Can I point out that by the

Can I point out that by the time you have adjusted whatever valve spring compressor you choose, you could have removed the valve using just two screwdrivers.

 

hillsider
hillsider's picture
Offline
Last seen: 57 min ago
Joined: 06/06/2010 - 20:42
You are not wrong re using

You are not wrong re using two screwdrivers or even a suitably sized spanner,  I have done the job that way many times when removing valves, but the compressor does seem to make reassembly easier/ safer.

Chris G
Chris G's picture
Offline
Last seen: 21 hours 59 min ago
Joined: 22/08/2017 - 14:00
Can I point out that by the

Can I point out that by the time you have adjusted whatever valve spring compressor you choose, you could have removed the valve using just two screwdrivers.

If I possessed 3 pairs of hands I'd be exploiting my dexterity in other ways :-)

Joking aside, I don't have an issue compressing the spring, its holding it there while fiddling around trying to fish the pin / circlip out or putting it back in..