Thermostat housing bolts replacement

TJ NAYLOR

MEMBER
1991 FORD ESCORT
1.9L
4 CYL
FWD
AUTOMATIC
800,000 MILES

So I need to replace my thermostat its stuck open, but before I start operation thermostat I need to get myself prepared for broken housing bolts, But I do not know the size of bolts I will need to purchase. Autozone cannot help me until I actually brake it and extract the bolt stub so we can match the bolt pattern.

3 Replies

STEVE W.

MECHANIC
13,597 POSTS

I did not find any information as to the size of the bolts. But most makers use common sizes with common head sizes as it saves money and assembly time.

So a common 1/4" bolt takes a 7/16 or 3/8" wrench
5/16" uses a 1/2" wrench
3/8" uses a 9/16" wrench

Metric is somewhat similar but they do have a few extra "standards" so if you go and put a socket on the bolts in question, that same socket should fit the replacement bolts.

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Sunday, December 18th, 2016 AT 1:13 PM

TJ NAYLOR

MEMBER
14 POSTS

Yes it was a success but now I have worse problems now I have no spark and the tacometer just sits when I try to start it and no engine light eather but I get fuel so I replaced my ignition coil pack and nothing I replaced the crank shaft position sensor and nothing then I replaced the ignition module and nothing so I check the to the connection to the ignition module to see if I'm getting power to it and nothing I did get power with the ignition + prong and I got 0.12 volts so maybe its the cce power relay next to the fuel pump relay

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Monday, February 6th, 2017 AT 8:59 PM

STEVE W.