Mr. Gasket thermostat rant

I had a problem like that with mine in my cutlass. I returned it and got another and had the problem again, so I heard that if you drill a small hole in the side of it it helps relieve some of the pressure and allowes it to open easier. After doing this (its been about 15,000 miles) I haven't had any problems with it...yet.

yeah, i was advised against a 180 degree mr. gasket. when i replaced mine.

i went with failsafe. i sell almost everyone on one that comes to me looking for one. its usually 15 dollars and worth every penny.

I have had no luck with any Mr Gasket junk. I don't know if their chrome stuff lasts, but their mechanical parts sure don't. I have a Mallory adjustable fuel pressure regulator on my turbo car that CONSTANTLY needs adjustment. These should be "set and forget" items.....I'm just glad I put a gauge on it so I can tell when it's getting stupid......

true, my car overheated with one in it brand new i will never use them again

I know this is an OLD thread but , this afternoon I Googled "problems with Mr. Gasket thermostat' and low and behold here we are.
My rant goes like this. I had a thermostat in my chevy 350 already( couldn't remember the temp. rateing) but was having some temp problems. So i swapped the old one, which was a high flow design 195, for a mr. gasket 180*. I don't know how long but with in a few months-maybe 200 miles I started noticeing my motor was takeing longer to cool after the thermos. opened. So I got another mr. gasket(#2) and took a friend advise and went with a 160*. when I did THIS swap I checked the 180 on the kitchen table and it opened but got to 190 or so before fully opening. Anyway I didn't get any improvement with the 160* so I flushed and added water wetter when I noticed how long it was takeing for the system to open up so I could completely fill the block with water and no air. Thought maybe my guages were malfunctioning so I took the 160* out and checked THAT ONE on the stove and there you go , it was takeing forever to open. Actually , I put the old 180* and the 160* in a pot of water on the stove and the 180* opened first at 195*(which sucks) and the 160* onlyopened about an 1/8th of an inch and didn't budge any futher all the way to boiling. So now I'm running with out a thermostat and it took about the same time to warm up as with a thermostat.
So all I can say is don't waste your money on MR. GASKET High flow( ha, ha) thermostats. I know I still have a flow problem with my cooling system but If I ever get it straightened out I try a Stant product if anything at all.

mr gasket sucks now. they werent always this bad though.

stant has fine thermostats. i'm putting a 180 degree high flow in my car as soon as i get the parts to finish putting the housing on....damned bypass hose! we hates it, doesnt we precious? yes yes, we hatessssss it!