Wednesday, March 4, 2015

DYT4000 31P777 0348 E1

Tuesday, March 3, 2015

Today was car wash day.   Was not too bad. 

Cranks too good.  No compression.  It had a RJ17 used in L heads and does not have enough reach to get the spark where it is needed.  Purchased a new sparkle plug.

I expect a valve problem and if not that a busted rod.   I have a spare head if it is a valve problem.  If it is a busted rod lets hope it did not mess up the rest of the engine.    The unit looks like it was well cared for most of its life so maybe the cylinder bore still has some life left in it.

Borrowed a wheel from the LT1000 but the rear end would not turn. Seem odd the both the engine and transaxle would be messed up.  Maybe the transaxle was bad and the valve got stuck while sitting.  Anyway it is now in the insulated but unheated shop so I can look at it in relative comfort. 

Wednesday, March 4, 2015

Went over and pulled the valve cover.  Came off easy.  Valves are moving.  Started pulling the head.  Have to take off muffler and carb which will have to wait till daylight.  It looks like someone has been in this engine but then it is 11 years old.

The head gasket had the typical failure. (so not a busted rod or valve problems) Path from the cylinder to the valve area.
Set the bore gage to zero on the good block and used that to measure this one.  It has .005" of wear in one axis and nearly zero in the other.  The 200 hour block where the owner never changed the filter is nearly uniform .005" on the top.  I do not recall what it was at the bottom but I have read dirty oil should wear more on the bottom but this was dirty oil and I am thinking it did not.

But the cylinder has no scoring and the crank and cam seems to be ok.  The cylinder is very oily but with that bad gasket it will suck oil into the cylinder on the intake stroke.

I am contemplating putting a used head gasket on it and see if I can get some compression.  But first I want to take a look at the valves.

Found a gasket but the metal foil is mostly missing.  Maybe use black RTV (which is what I have) to get a good seal just to test the conditions of the rings with a compression test.....   But amazon is selling the gasket for $6 and I am not going to mess around for that.  I should come in about a week.  It would be nice to find that this thing could run without major work.  Maybe too much to wish for.

Switching over to the rototiller 5.5HP engine assembly.

Friday, March 6, 2015

Gasket will be here on tuesday.

Saturday, March 7, 2015

Need to pull off the seat pan to get at the transaxle.  

Tuesday, March 10, 2015

The head gasket came but was unusable.  Amazon will have another here on Thursday.  Not bad.

Thursday, March 12, 2015

There was a mixup in the replacement gasket.  Not sure what happened but I am told there will be on here tomorrow.