803A engine help

[Ray70]

Any new pictures you can share?

 

[spark500001]

Don't worry about the head gasket thickness, my experience has been that using the "standard" thickness gasket that comes in the gasket kits works just fine.
I'm not even sure if you can still buy the other thicknesses or not.
You should just remove the radiator and shroud assembly. Its easy and I think only 6 or 8 bolts to remove it.

So there is no damage to the valves or pistons, but I assume there are round marks in the carbon buildup on the pistons where the valves touched?
Or do you mean the valves did not hit the pistons at all??

we didn't see any hard contact it seems as the pushrods and rocker arms took all the force . we pulled the radiator and shroud but it looks as the radiator support has to be removed . the large sheet metal frame that holds the radiator is what we are referring to.
thanks again

 

[Ray70]

Correct, I meant the entire metal end of the generator enclosure, radiator and all comes out with about 6 bolts. It looks like my description above was not accurate.
I'm not quite understanding how things got so damaged if the valves didn't hit the pistons.
Do you suspect the valves were stuck in the valve guides maybe?
I can't imagine how else you could bend pushrods and break rocker arms unless the valves were somehow frozen solid.

 

[spark500001]

You have a Lister LPW4 in an MEP 803A that was made for Onan & they name it the DN4. Don't use the China copy parts, it is not worth it.

Ray, where is the best place to buy a engine gasket set that isn't from China?
where can we find a gasket set ?

 

[Ray70]

If you have to have OEM gaskets you can go to Online power products and get the gasket kit # 657-34280 for $326 and the head gasket is separate, PN. 754-40891 for $85.
To be honest, I've probably used a dozen or more China kits for <$100 and the only gasket in the kits that is a little sub-par is the front crank seal.
The OD seems a little small and presses into the front cover a bit too easy for my liking so I use a thin coating of gasket maker on the OD to help make sure it doesn't move.
I really don't think OEM gaskets are worth the extra 500% $ markup.
You could also mix and match OEM and China if you want, get the OEM head gasket and an OEM crank seal and use the China kit for the rest??

 

[Ray70]

Here's a better deal on Ebay.UK but I have no idea about any import duties or any additional expenses these days!

657-34281 Lister Petter LPW/LPWS4 Complete Gasket Set + 754-40891 Head Gasket | eBay UK

AB37-38 IV7 KA27-28 PA80-88.

www.ebay.co.uk

 

[2Pbfeet]

Here's a better deal on Ebay.UK but I have no idea about any import duties or any additional expenses these days!

https://www.ebay.co.uk/itm/256411269420

Perhaps more to the point, there are no packages being shipped from the UK at the moment due to that uncertainty.

All the best, 2PbFeet