Thanks, Intek 18 HP Together

17 years ago

Just want to thank everyone, especially Walt, for help with salvaging this engine. If I had not found this forum and been advised that these engines blow headgaskets, I would have been well on my way to a new lawn tractor. The head & valve cover gaskets cost ~$12, much cheaper & I enjoy engine work.

This was a pretty straight forward job and the engine runs like new. Power is back and no oil puffs. I will re-torque the head & adjust valves at 10 hours.

A couple of comments for those anticipating this job.

1. Do not scrape the head or deck with a putty knife, use a scotch pad to clean off old head gasket.

2. The valves may have a small cap on them that can fall off. The overhaul manual isn't really clear on this. I didn't know this and one came off as I was putting the head back on. Fortunately I saw it and didn't lose the cap.

3. Spend some extra time on adjusting the valves. My engine starts easier and runs smoother than ever before. I think the valves may have been out of adjustment.

4. The engine manual is ~$16 + shipping. It was helpful & I'm glad I got it. But if you have mechanical experience, it wasn't needed. I got all of the info needed from this forum.

5. Add a fuel shutoff valve to your system if it doesn't have one. It will prevent raw gas from running through the carb into the oil. I think this is more common on newer engines, it is a good idea for all. I got one for $5, cheap insurance.

6. I couldn't see into the pushrod galley to see if it was blowing by, the guide plate was in the way. Yet when you get to this point, removing the head is only a few minutes away. As soon as I pulled the head, it was obvious that oil was being sucked in and compression was blowing into the galley.

Again, thanks & have great Holidays,

Paul

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Comments (12)

walt2002
17 years ago
"The valves may have a small cap on them that can fall off. (snip)I didn't know this and one came off as I was putting the head back on. Fortunately I saw it and didn't lose the cap."

IF I sent you instructions, this was mentioned.

Walt Conner
jlazaro317
17 years ago
Walt,
Could I get you to send me those instructions or are they posted someplace? I just took apart my 17.5 HP Briggs because of oil consumption. Sure enough it was leaking between the cylinder and the valve galley. I already ordered the valve gasket set and I'll be ready to go once the parts arrive.
Thanks,
John
jlazaro317@yahoo.com
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Thanks for your input folks and sorry I haven't replied before now - had ticked the box "send me an email when you get a reply" and hadn't seen any sowas thinking I had no replies. I can't help but think that fuel shut off issue is the culprit as I checked the oil level before and it was fine - after the engine blew it was low - thought it must have flung some out but this makes more sense. What sort of $s are these motors in the US? - I wa\s quoted a "special" price of $1100AUD for a 15.5 Intek from localshop but there is one on ebay locally for $847 - details are 15.5HP OHV Premium Intek series. Model 31E677.0133.B1 with the std. universal 1" shaft. The deck is 42" and while I have 1 1/4 acres there';s lots of gardens so nota big job - only went with 42" as it was a good deal swcond hand - or so it seemed :( Thanks for your help & any more suggestions much appreciated - Graham
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walt2002
17 years ago
On the way, please mention your engine model number next time.

Walt Conner
jlazaro317
17 years ago
Walt,
Got it. Thanks. By the way the model number is 31L777.
John
reg1
16 years ago
42A707 18hp twin. Guys I understand the valve adjust procedure. But my question is where are the adjustments performed? I've pulled the valve covers and see the valves & springs but where do you adjust?
walt2002
16 years ago
We have been talking about OHV engines. Your engine is a flathead (side valve) engine. These engines do not get out of adjustment as readily as an OHV engine and there is no adjustment. To get proper clearance, you have to remove the heads and grind the valve stems IF too close or grind the valves and perhaps the seats IF too wide.

The Intake valve clearance is what is critical on your engine.

Walt conner
bill_kapaun
16 years ago
Reg1-
All you can do for the moment is to check the valve lash.
As Walt said, to change the clearance requires much more additional "effort".
fisher40037
16 years ago
Reg1, what is your complaint? Engine won't turn over?

Fish
edward2008
16 years ago
My 18HP engine wont turn over easy and it seems to have too much compression. I have cheked the valves and they are working good. How do you adjust the valves on this engine.
walt2002
16 years ago
For instructions -
wconner5 at verizon dot net (put in proper format)

Walt conner
argneka_yahoo_com
15 years ago
Hi,

I need the procedure to set the valves on my 18hp intec engine. Does anyone have the procedure?

Thanks
bill_kapaun
15 years ago
Look at the post JUST ABOVE yours!

Thanks, Intek 18 HP Together

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