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post #1 of 15 Old 06-15-2019, 05:33 PM Thread Starter
RJW
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Help needed....Intek valve clearance

Hello everyone

This is my first post – hopefully, someone can help.

I have a Craftsman with an Intek 19.5hp engine. ENG/42E707-1631-01. I believe this is an L Head Twin.

The mower is showing symptoms similar to a valve clearance problem. Difficulty in starting with ¼ or ½ turns when cranking before getting stuck. It will eventually start and the engine will then perform normally until the next attempted start.

There is a new battery – starter and solenoid all fitted in the last couple of months.

Could someone advice what could possibly these problems? if it is a valve clearance problem then I assume the only way is to grind the stems or go for a valve replacement.

Many thanks

Ron
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post #2 of 15 Old 06-15-2019, 08:11 PM
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re: Help needed....Intek valve clearance

No valve grinding needed. You may need to adjust the clearance by removing the valve cover and using a feeler gauge to adjust the valve and rocker arm clearance. You may want to find a manual for your motor so you do this right.

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post #3 of 15 Old 06-15-2019, 08:26 PM
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Re: Help needed....Intek valve clearance

Same thing happening with a friend’s 20 hp B&S in a Craftsman. Local Lawn Care dealer’s opinion was it needed a valve adjustment and this is fairly typical.
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post #4 of 15 Old 06-15-2019, 09:26 PM Thread Starter
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Re: Help needed....Intek valve clearance

Thanks for the replies. The problem is that this is an opposed engine and does not have adjustable valves. I believe the only way to adjust them is to grind the stems.

I was wondering if there should be other things I should be checking before getting involved with the valves.

I have another mower with a Vanguard engine and the adjusting of the valves is straightforward. This engine seems far more difficult to tackle the task of valve adjustment. Hoping there could be another explanation of my slow cranking issues.

I appreciate the help you are giving.
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post #5 of 15 Old 06-15-2019, 09:48 PM
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Re: Help needed....Intek valve clearance

Doing the valves on your engine is a bit involved. Check your cable connections at the battery, solenoid, starter, and ground. The heads are easy to remove, decarbon them and the pistons.
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post #6 of 15 Old 06-15-2019, 11:48 PM
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Re: Help needed....Intek valve clearance

go to section 17.35 of this to consider electrical issues.
web.ncf.ca/da229/smallengine/mtd-769-01415_electrical-2.pdf

With those engines I always use the 340 CCA battery although I just replaced a dead one with a 150 CCA and it started right up.
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post #7 of 15 Old 06-16-2019, 06:00 PM Thread Starter
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Re: Help needed....Intek valve clearance

Thanks for the replies. That is an informative article 38racing great reference piece.

I did what you suggested RoyM and although the mower remains temperamental it is significantly better than before.

I will see how the Craftsman behaves over the next week or so - I will update as and when there is news.

Thanks for all your help it makes tackling mower problems so much easier when there is access to the forum of knowledgeable people.
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post #8 of 15 Old 06-17-2019, 12:38 AM
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Re: Help needed....Intek valve clearance

Hmmm...I thought the Intek engine was an over head valve engine. My 14.5hp is. I'm not very familiar with other inteks, just my own. My Bad!

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post #9 of 15 Old 06-17-2019, 10:16 AM
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Re: Help needed....Intek valve clearance

I thought the Intek were all overhead valve as well...the owner must have an opposed flathead Briggs or Kohler..
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post #10 of 15 Old 06-17-2019, 01:26 PM Thread Starter
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Re: Help needed....Intek valve clearance

Hammerhead & Cranman you are so right all Intek engines are overhead valves.

I can't understand for the life of me why I wrote my engine is an Intak. The engine is an opposed twin and it is 19.5 hp and it is in a 1997 Craftsman. It is opposed twin as the Valves are
located in the Cylinder Block in the chamber next to the Piston under the spark plug - also the cylinders that are on opposite sides of each other As I mentioned it is an L Head twin - so why I then added it was an Intak I will never know. I have two mowers one with a Vanguard 16hp and the other the Briggs opposed twin. So why Intak popped into my head I do not know.

Please accept my apologies for a mistake which confirmes old age can be a huge problem at times. (frightening )

Having said all that I still have the same issue. It seems to be a valve problem. On these engines - which I am not familiar with I believe it will be easier to just replace the valves. I guess the first step is to check the valve clearance.

Again sorry for the misleading information in my initial post - definitely losing it.

Thanks

Ron
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post #11 of 15 Old 06-18-2019, 12:38 AM
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Re: Help needed....Intek valve clearance

Hahaha...no problem. We all have those days. And yes you did also say L-head in your post which got me to thinking which one do you have. Unfortunately I have never had to grind a valve so I can't be of any real help to you on this. But I will stay tuned to see what the pro's have to say, as to how to do this procedure just in case I have to do this some day.

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post #12 of 15 Old 06-18-2019, 08:41 AM
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Re: Help needed....Intek valve clearance

I can send you a Service Manual for your engine IF you like and I think I have a narrative on causes of difficulty with starter turning that type engine.

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post #13 of 15 Old 06-18-2019, 11:03 AM
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Re: Help needed....Intek valve clearance

QUOTE RJW:" On these engines - which I am not familiar with I believe it will be easier to just replace the valves."

No, you will go through just as much effort to replace with new as you would adjusting the existing valves. Except, you would not have to clean new valves of carbon deposits, etc.
New valves should be lapped, and adjusted, just the same as old ones. The actual dimensions of the valve seats, cam followers/tappets, cam lobes, cam bearing wear/clearance, and variations in machining tolerance add up to indicate that whenever the valve train has some parts replaced, clearance should be checked and adjusted as needed. The valve stem on a new valve is at the maximum length, so will need to be adjusted to match the current valve length, and possibly need to have a trim.
If you watch the Indiana guy, Taryl Dactyl, he actually demonstrates adjusting the valves in his 'rebuild' of a Tecumseh. I do question whether the valves should be lapped before the adjustments are made, but I am not a professional, and have not read the manual... Anyway, if you watch his video on the Tecumseh, after the clowning, he does show the things that should be looked at, and the opposed twin engine is very similar in construction to the one he works on, just has another piston pointing the other way...
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post #14 of 15 Old 06-18-2019, 04:43 PM Thread Starter
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Re: Help needed....Intek valve clearance

Hello

Walt thank you for your kind offer - yes please send the service manual and any other information you have. I am appreciative of any help you can give. I am a novice but will send the forum details of any progress I make which will hopefully help others. ( Do you need my email? )

TomwO.Thank you for your [post. I will certainly look at the Teryl video on youtube as you suggested - thank you.

Thanks again everyone for your help.

I will continually update because hopefully, it will help people to see how a novice tackles this problem with the help of more knowledgable people on this forum.

Thanks

Ron
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post #15 of 15 Old 06-18-2019, 04:55 PM
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Re: Help needed....Intek valve clearance

You can take a flat chainsaw file and file the valve clearance you need without dismantling the engine....I've done it on Tecumseh Sno Kings, but never on an opposed Briggs
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