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  #1  
Old August 8th, 2012, 12:37
oldbill oldbill is offline
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Degreasing Engine and Engine Compartment

I've done this on older vehicles without all of the new electronics, but wanted to check before I do this on the 4.0L in my 2000 Cherokee and 2002 Grand Cherokee. Is it save to use a spray on engine degreaser and then wash it off with a hose? Is it save to use the degrease option in the quarter ($2.00) car washes to wash and degrease the engine and engine compartment?

Thanks,
Bill
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  #2  
Old August 8th, 2012, 12:59
LYKOS LYKOS is offline
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Re: Degreasing Engine and Engine Compartment

For what it's worth I use the local quarter car wash and spray the crap out of my engine,I leak oil everywhere, with little or no ill effect.

In fact, my Jeep handles it better than any of the older vehicles I've had. Of course I have an 01' with a coil rail rather than a distributor.

I wouldn't be afraid of it.

My brother uses oven cleaner on his 650 hp Subaru STI engine. And it still runs in the 7s on the 1/8th. So it can't be too bad.
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  #3  
Old August 8th, 2012, 20:31
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ParadiseXJ ParadiseXJ is offline
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Re: Degreasing Engine and Engine Compartment

We're not allowed to spray off motors with any "degreaser" or petroleum based cleaner here at our local CW. They have an engine cop (not really a COP, but a guy) to make sure you're using Simple Green, Purple Power or 409 only. Just soap.

Can't use Gunk or any other stuff like that.

I just use Purple Power, let it set, hose it off with hose nozzle at home. It's clean.
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  #4  
Old August 9th, 2012, 12:46
Otter Otter is offline
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Re: Degreasing Engine and Engine Compartment

i've used it a couple times on my 01 with no problems. i just use a gentle stream of water to rinse it, just to be safe.
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  #5  
Old August 10th, 2012, 01:55
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Bbasso Bbasso is offline
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Re: Degreasing Engine and Engine Compartment

washed mine plenty of times, never a problem. Even left the hood open in the rain twice... lol= free rinse!
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Old August 10th, 2012, 12:38
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sjx40250 sjx40250 is offline
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Re: Degreasing Engine and Engine Compartment

I was going to respond but thought you might have the coil over plug config. If you have a distributor, you will need to opon it up and dry it out. Never fails for me. The other issue is to make sure all you sensor connectors are tight and even use a little dielectric grease on them prior to cleaning. This will keep the water out.
Many TPS are sensitive to water and may fail as a result. I am careful not to clean around them if I don't have to. My 1990 has nearly 210K miles on it and still has the original TPS. The connectors are broken from having adjusted so many times over the years that I have to use tie straps to keep them together. They should have reversed the connectors so the TPS side connector would be the easiest one to replace as it is the other one that is broken!
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Old August 10th, 2012, 15:11
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Brandon77 Brandon77 is offline
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Re: Degreasing Engine and Engine Compartment

I use Purple Power to and it works well. But the only time i used a degreaser on my engine was before i did my engine swap and cleaned the used engine before it went in. Now i just spray with water and then take it for a drive to steam the water off.
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Old August 10th, 2012, 18:13
muddypunk muddypunk is offline
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Re: Degreasing Engine and Engine Compartment

When I first picked up my little stocker it was hosed in thick gnarley crap so I went to the dollar store and picked up 1$ cans of oven cleaner sprayed one can on drove to the car wash and left it running while I sprayed it down.Never had any issue washing any of my Jeep engine bays Ive Owned 6 now and still own the first.
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Old August 10th, 2017, 10:33
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ehall ehall is offline
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Re: Degreasing Engine and Engine Compartment

I use Gunk and a pressure washer, never have any trouble
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Old August 10th, 2017, 18:33
lawagoneer lawagoneer is offline
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Re: Degreasing Engine and Engine Compartment

I use Purple Power and my pressure washer. Never had a problem.
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  #11  
Old August 10th, 2017, 21:33
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ParadiseXJ ParadiseXJ is offline
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Re: Degreasing Engine and Engine Compartment

What to cover? Cover your throttle body and throttle body electrics (TPS, IAC?) and any other sensitive stuff. Don't BLAST it. Easy on the wiring, easy on the fuel injectors. Straight Purple Power may dull paint if you let it sit too long. Read the dilution table on the container.

Start it up as soon as you're done to let it heat up and dry out.
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Old August 11th, 2017, 09:20
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8Mud 8Mud is offline
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Re: Degreasing Engine and Engine Compartment

I often wrap the TB, distributor, PDC and PCM with tin foil. Sometimes I don't, I've gotten away with not wrapping a few times, so far. An ounce of prevention is worth a pound of headache. I'm pretty careful where I spray full power and how long.

I just use hot water and a pressure washer. I figure a light coating of oil is unlikely to hurt anything and may help with rust prevention.
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Old August 11th, 2017, 10:27
elwoodblues elwoodblues is offline
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Re: Degreasing Engine and Engine Compartment

I just did mine this morning. Gunk and a pressure washer, standing far enough back so only the hard blast part of the pressure washer doesn't hit the engine. Covered up the sensors around the TB and alternator. No issues, fired right up afterwards and ran like nothing happened.
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  #14  
Old August 12th, 2017, 16:10
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Ecomike Ecomike is offline
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Re: Degreasing Engine and Engine Compartment

Tin foil? You????




LOL,



Quote:
Originally Posted by 8Mud View Post
I often wrap the TB, distributor, PDC and PCM with tin foil. Sometimes I don't, I've gotten away with not wrapping a few times, so far. An ounce of prevention is worth a pound of headache. I'm pretty careful where I spray full power and how long.

I just use hot water and a pressure washer. I figure a light coating of oil is unlikely to hurt anything and may help with rust prevention.
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