Thermostat fit?

[FONT=&quot]Hi Guys,[/FONT]

[FONT=&quot]Am completely rebuilding a 2.25 petrol engine and have got round to fitting a new stat. When i put the stat in to bypass casting and placed the top hose casting in top without o ring there is a gap between the two casting, is this normal [/FONT]

[FONT=&quot]I haven't even fitted the o ring the parts manuals show. I remember i had to destroy the old stat to get it out as it was stuck firmly in place. Also no o ring present.[/FONT]

[FONT=&quot]Does the stat outer casing collapse slightly to form a seal and this gap before bolting down is normal [/FONT]

[FONT=&quot]Any thoughts? I dont remember ever seeing this gap before on different engines.[/FONT]

Thanks

Least you didn't create two separate threads

Douh. Thats what you get for not chcking before posting. Duplicate removed

Nah that doesn't sound right to me...I can't remember exactly but I seem to remember the stat on these has a large skirt and I had to thoroughly clean (scrape with a Stanley blade) out my housing as it looked like Mother Shipton's Cave...

Did you replace the thermostat housing gasket? I believe the part you need is upper thermostat gasket, part no. 527110

hi guys thanks for the response. didn't sound right to me either i'll post some pics later. I dont remember having any issues with my diesel stat. scraped out the groove.

do u guys put an o ring on top of stat. if so my problem just got bigger

edd s2 said:

hi guys thanks for the response. didn't sound right to me either i'll post some pics later. I dont remember having any issues with my diesel stat. scraped out the groove.

do u guys put an o ring on top of stat. if so my problem just got bigger

Click to expand...

When I replaced mine there was no O ring. Just the gasket between the the 2 stat housing parts.

2 1/4 engine uses gasket to seal housing and o ring to seal thermostat

found the problem as jamesmartin said there is an o ring on top of stat. mine had become one with the rust. I've dug it out, replaced with a new one and at first there is a gap between casting buts o ring compresses and gap closes nicely once bolts tightened.

Thanks everyone for your help