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Old 10-07-2016, 07:31 PM
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Pressure wash engine bay before valve seal change?

Getting ready to swap out the valve spring seals on my 02 JGC Overland 4.7L HO this weekend. 334,000+ KM. Smokes after engine comes up to temp at idle, blows a bit of smoke when taking off from a stop sign. So I ordered the tool from Happy Hank on ebay, got new FelPro valve spring seals and valve cover gaskets, new sparks plugs... got the 12" spark plug hose to insert air into the chamber while pulling the springs. My question is.... " Has anyone cleaned the engine bay with a pressure washer before doing major engine work?" Any tips helpful. TIA

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Old 10-07-2016, 07:50 PM
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Re: Pressure wash engine bay before valve seal change?

I pressure wash all engine bays in the fleet I maintain.Don't soak obvious modules. I have one Clarke forklift that doesn't like it wet around the coil pack afterwards,so I take compressed air after it drying it off well and will usually start running right after that.
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Old 10-10-2016, 04:10 PM
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Re: Pressure wash engine bay before valve seal change?

Don't overdo it with the pressure.

Those coin op washes are reasonably close to a good pressure.

If you have a 2000-3000 psi pressure washer, you can cause damage under the hood if not careful.

I'd spray it down with one of those engine cleaners and let it set, then hit it.

I pressure wash mine every other week or so.
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Old 10-13-2016, 08:14 PM
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Re: Pressure wash engine bay before valve seal change?

Quote:
Originally Posted by lstowell View Post
Don't overdo it with the pressure.

Those coin op washes are reasonably close to a good pressure.

If you have a 2000-3000 psi pressure washer, you can cause damage under the hood if not careful.

I'd spray it down with one of those engine cleaners and let it set, then hit it.

I pressure wash mine every other week or so.
just stay away from the Brains on the passenger side use a Bag Tarp w/e.

most coin operated have decent pressure without pulling the trigger.

got a link to the tool? my 4.7 only smokes on start up after it sits for a while.
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Old 10-14-2016, 07:17 AM
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Re: Pressure wash engine bay before valve seal change?



This tool is awesome! Alldata quotes 22.8 hours to replace the valve seals in place, did the job in 14 hours with it. Where are you located, I can ship it to you, no need for everyone to buy one. It is a one time job, this tool will last forever!
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